* Re: [PATCH] makedumpfile: request the kernel do page scans
[not found] ` <20121119180710.GA16448@sgi.com>
@ 2012-12-10 0:59 ` HATAYAMA Daisuke
2012-12-10 15:36 ` Cliff Wickman
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: HATAYAMA Daisuke @ 2012-12-10 0:59 UTC (permalink / raw)
To: cpw
Cc: vgoyal, kexec, ptesarik, linux-kernel, kumagai-atsushi,
""@jp.fujitsu.com
[-- Attachment #1: Type: Text/Plain, Size: 4776 bytes --]
From: Cliff Wickman <cpw@sgi.com>
Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
Date: Mon, 19 Nov 2012 12:07:10 -0600
> On Fri, Nov 16, 2012 at 03:39:44PM -0500, Vivek Goyal wrote:
>> On Thu, Nov 15, 2012 at 04:52:40PM -0600, Cliff Wickman wrote:
>> >
>> > Gentlemen,
>> >
>> > I know this is rather late to the game, given all the recent work to speed
>> > up makedumpfile and reduce the memory that it consumes.
>> > But I've been experimenting with asking the kernel to scan the page tables
>> > instead of reading all those page structures through /proc/vmcore.
>> >
>> > The results are rather dramatic -- if they weren't I would not presume to
>> > suggest such a radical path.
>> > On a small, idle UV system: about 4 sec. versus about 40 sec.
>> > On a 8TB UV the unnecessary page scan alone takes 4 minutes, vs. about 200 min
>> > through /proc/vmcore.
>> >
>> > I have not compared it to your version 1.5.1, so I don't know if your recent
>> > work provides similar speedups.
>>
>> I guess try 1.5.1-rc. IIUC, we had the logic of going through page tables
>> but that required one single bitmap to be present and in constrained
>> memory environment we will not have that.
>>
>> That's when this idea came up that scan portion of struct page range,
>> filter it, dump it and then move on to next range.
>>
>> Even after 1.5.1-rc if difference is this dramatic, that means we are
>> not doing something right in makedumpfile and it needs to be
>> fixed/optimized.
>>
>> But moving the logic to kernel does not make much sense to me at this
>> point of time untile and unless there is a good explanation that why
>> user space can't do a good job of what kernel is doing.
>
> I tested a patch in which makedumpfile does nothing but scan all the
> page structures using /proc/vmcore. It is simply reading each consecutive
> range of page structures in readmem() chunks of 512 structures. And doing
> nothing more than accumulating a hash total of the 'flags' field in each
> page (for a sanity check). On my test machine there are 6 blocks of page
> structures, totaling 12 million structures. This takes 31.1 'units of time'
> (I won't say seconds, as the speed of the clock seems to be way too fast in
> the crash kernel). If I increase the buffer size to 5120 structures: 31.0 units.
> At 51200 structures: 30.9. So buffer size has virtually no effect.
>
> I also request the kernel to do the same thing. Each of the 6 requests
> asks the kernel to scan a range of page structures and accumulate a hash
> total of the 'flags' field. (And also copy a 10000-element pfn list back
> to user space, to test that such copies don't add significant overhead.)
> And the 12 million pages are scanned in 1.6 'units of time'.
>
> If I compare the time for actual page scanning (unnecessary pages and
> free pages) through /proc/vmcore vs. requesting the kernel to do the
> scanning: 40 units vs. 3.8 units.
>
> My conclusion is that makedumpfile's page scanning procedure is extremely
> dominated by the overhead of copying page structures through /proc/vmcore.
> And that is about 20x slower than using the kernel to access pages.
I have not tested your patch set on the machine with 2TB due to
reservation problem, but I already tested it on my local machine with
32GB and saw big performance improvement.
I applied your patch set on makedumpfile v1.5.1-rc and added an option
-N not to dump pages to focus on scanning pages part only.
By this, while scanning pages in user-space took about 25 seconds,
scanning pages in kernel-space took about 1 second.
During the execution I profiled it using perf record/report and its
results are attached files.
>From this we can notice that current makedumpfile consumes large part
of execution time for ioremap and its related processing. copy_to_user
was less than 2% only relative to a whole processing.
Looking into the codes around read method of /proc/vmcore, its call
stack can be broken into as follows:
read_vmcore
read_from_oldmem
copy_oldmem_page
copy_oldmem_page reads the 1st kernel's memory *per page* using
ioremap_cache and after completing it, immediately unmaps the remapped
address using iounmap.
Because ioremap/iounmap is called *per page*, this number of calling
ioremap throught scanning a whole pages is unchanged even if
makedumpfile's cache size is changed. This seems consistent with
Cliff's explanation that increasing 512 entries of makedumpfile's
cache was meaningless.
I think the first step to address this issue is to introduce a kind of
cache in read_vmcore path to reduce the number of calling
ioremap/iounmap. Porting scanning logic into kernel-space should be
considered if it turns out not to work enough.
Thanks.
HATAYAMA, Daisuke
[-- Attachment #2: makedumpfile-output-user.log --]
[-- Type: Text/Plain, Size: 28308 bytes --]
sadump: does not have partition header
sadump: read dump device as unknown format
sadump: unknown format
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mem_map\rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [ 3 %] \rExcluding unnecessary pages : [ 17 %] \rExcluding unnecessary pages : [ 26 %] \rExcluding unnecessary pages : [ 34 %] \rExcluding unnecessary pages : [ 42 %] \rExcluding unnecessary pages : [ 50 %] \rExcluding unnecessary pages : [ 59 %] \rExcluding unnecessary pages : [ 67 %] \rExcluding unnecessary pages : [ 75 %] \rExcluding unnecessary pages : [ 84 %] \rExcluding unnecessary pages : [ 92 %] \rExcluding unnecessary pages : [100 %] \rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [ 13 %] \rExcluding unnecessary pages : [ 22 %] \rExcluding unnecessary pages : [ 30 %] \rExcluding unnecessary pages : [ 38 %] \rExcluding unnecessary pages : [ 47 %] \rExcluding unnecessary pages : [ 55 %] \rExcluding unnecessary pages : [ 63 %] \rExcluding unnecessary pages : [ 71 %] \rExcluding unnecessary pages : [ 80 %] \rExcluding unnecessary pages : [ 88 %] \rExcluding unnecessary pages : [ 96 %] \rExcluding unnecessary pages : [100 %]
(268)
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STEP [Excluding unnecessary pages] : 11.224292 seconds
STEP [Excluding unnecessary pages] : 11.250834 seconds
STEP [Copying data ] : 11.407836 seconds
Writing erase info...
offset_eraseinfo: 6c0eb8, size_eraseinfo: 0
Original pages : 0x00000000007ec289
Excluded pages : 0x00000000007b9efb
Pages filled with zero : 0x0000000000000000
Cache pages : 0x0000000000012cff
Cache pages + private : 0x0000000000012015
User process data pages : 0x0000000000001ece
Free pages : 0x0000000000793319
Remaining pages : 0x000000000003238e
(The number of pages is reduced to 2%.)
Memory Hole : 0x0000000000093d77
--------------------------------------------------
Total pages : 0x0000000000880000
The dumpfile is saved to /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-1.
makedumpfile Completed.
[ perf record: Woken up 55 times to write data ]
[ perf record: Captured and wrote 13.735 MB /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data1 (~600084 samples) ]
[-- Attachment #3: makedumpfile-output-kernel.txt --]
[-- Type: Text/Plain, Size: 26135 bytes --]
sadump: does not have partition header
sadump: read dump device as unknown format
sadump: unknown format
LOAD (0)
phys_start : 1000000
phys_end : 22f1000
virt_start : ffffffff81000000
virt_end : ffffffff822f1000
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virt_start : ffff880000010000
virt_end : ffff88000009b000
LOAD (2)
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phys_end : 27000000
virt_start : ffff880000100000
virt_end : ffff880027000000
LOAD (3)
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phys_end : 7b00d000
virt_start : ffff880037000000
virt_end : ffff88007b00d000
LOAD (4)
phys_start : 100000000
phys_end : 880000000
virt_start : ffff880100000000
virt_end : ffff880880000000
Linux kdump
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page_size : 4096
max_mapnr : 880000
Buffer size for the cyclic mode: 2228224
num of NODEs : 4
Memory type : SPARSEMEM_EX
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mem_map
Excluding unnecessary pages : [ 0 %]
Excluding unnecessary pages : [100 %]
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Excluding unnecessary pages : [100 %]
(268)
mem_map : ffffea001d500000
pfn_start : 860000
pfn_end : 868000
mem_map (269)
mem_map : ffffea001d6c0000
pfn_start : 868000
pfn_end : 870000
mem_map (270)
mem_map : ffffea001d880000
pfn_start : 870000
pfn_end : 878000
mem_map (271)
mem_map : ffffea001da40000
pfn_start : 878000
pfn_end : 880000
STEP [Excluding unnecessary pages] : 0.438936 seconds
STEP [Excluding unnecessary pages] : 0.467304 seconds
STEP [Copying data ] : 0.624328 seconds
Writing erase info...
offset_eraseinfo: 6c0eb8, size_eraseinfo: 0
Original pages : 0x00000000007ec289
Excluded pages : 0x00000000007b9efb
Pages filled with zero : 0x0000000000000000
Cache pages : 0x0000000000012cff
Cache pages + private : 0x0000000000012015
User process data pages : 0x0000000000001ece
Free pages : 0x0000000000793319
Remaining pages : 0x000000000003238e
(The number of pages is reduced to 2%.)
Memory Hole : 0x0000000000093d77
--------------------------------------------------
Total pages : 0x0000000000880000
The dumpfile is saved to /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-2.
makedumpfile Completed.
[ perf record: Woken up 3 times to write data ]
[ perf record: Captured and wrote 0.598 MB /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data2 (~26144 samples) ]
[-- Attachment #4: perf_report_user.txt --]
[-- Type: Text/Plain, Size: 47878 bytes --]
Failed to open [ext4], continuing without symbols
No kallsyms or vmlinux with build-id a77a2293aab413880b8b361bb5b863a1680c8eab was found
[qla2xxx] with build id a77a2293aab413880b8b361bb5b863a1680c8eab not found, continuing without symbols
Failed to open [dm_mirror], continuing without symbols
No kallsyms or vmlinux with build-id 8e4a472eadb14fb0cde985ef8571b543880472dd was found
[megaraid_sas] with build id 8e4a472eadb14fb0cde985ef8571b543880472dd not found, continuing without symbols
No kallsyms or vmlinux with build-id 93346fc362be38e207aeaae310a339fb502d9acb was found
[jbd2] with build id 93346fc362be38e207aeaae310a339fb502d9acb not found, continuing without symbols
# ========
# captured on: Fri Dec 7 16:45:43 2012
# hostname : (none)
# os release : 3.7.0-rc8-cliff-bench+
# perf version : 3.7.rc8.3.ge0fb22
# arch : x86_64
# nrcpus online : 1
# nrcpus avail : 1
# cpudesc : Intel(R) Xeon(R) CPU E7- 4820 @ 2.00GHz
# cpuid : GenuineIntel,6,47,2
# total memory : 240104 kB
# cmdline : /var/crash/perf record -g -o /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data1 /var/crash/makedumpfile-cliff --message-level 31 -i /var/crash/vmcoreinfo.txt -N -o -d 31 /proc/vmcore /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-1
# event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 2 }
# HEADER_CPU_TOPOLOGY info available, use -I to display
# HEADER_NUMA_TOPOLOGY info available, use -I to display
# pmu mappings: cpu = 4, software = 1, tracepoint = 2, uncore_bbox_0 = 15, uncore_bbox_1 = 16, uncore_cbox_0 = 7, uncore_cbox_1 = 8, uncore_cbox_2 = 9, uncore_cbox_3 = 10, uncore_cbox_4 = 11, uncore_cbox_5 = 12, uncore_cbox_6 = 13, uncore_cbox_7 = 14, uncore_mbox_0 = 19, uncore_mbox_1 = 20, uncore_rbox_0 = 21, uncore_rbox_1 = 22, uncore_sbox_0 = 17, uncore_sbox_1 = 18, breakpoint = 5, uncore_ubox = 6, uncore_wbox = 23
# ========
#
# Samples: 91K of event 'cycles'
# Event count (approx.): 23676246537
#
# Overhead Command Shared Object
# ........ ............... ....................
#
90.38% makedumpfile-cl [kernel.kallsyms]
|
|--19.73%-- __purge_vmap_area_lazy
| |
| |--80.50%-- free_vmap_area_noflush
| | free_unmap_vmap_area
| | remove_vm_area
| | iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| | |
| | |--66.59%-- 0x0
| | |
| | --33.41%-- 0x45524f4300000001
| |
| |--19.43%-- vm_unmap_aliases
| | change_page_attr_set_clr
| | _set_memory_wb
| | ioremap_change_attr
| | kernel_map_sync_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| --0.07%-- [...]
|
|--15.58%-- try_preserve_large_page
| |
| |--99.97%-- __change_page_attr
| | __change_page_attr_set_clr
| | change_page_attr_set_clr
| | _set_memory_wb
| | ioremap_change_attr
| | kernel_map_sync_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| --0.03%-- [...]
|
|--14.51%-- iomem_map_sanity_check
| |
| |--99.97%-- __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| | |
| | |--50.01%-- 0x6e6d2f0065726f63
| | |
| | --49.99%-- 0x45524f4300000001
| --0.03%-- [...]
|
|--11.06%-- walk_system_ram_range
| |
| |--64.71%-- pat_pagerange_is_ram
| | |
| | |--50.87%-- free_memtype
| | | iounmap
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | --49.13%-- reserve_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| |--34.75%-- page_is_ram
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| --0.54%-- [...]
|
|--4.84%-- __phys_addr
| |
| |--52.48%-- __change_page_attr
| | __change_page_attr_set_clr
| | change_page_attr_set_clr
| | _set_memory_wb
| | ioremap_change_attr
| | kernel_map_sync_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| |--45.72%-- try_preserve_large_page
| | __change_page_attr
| | __change_page_attr_set_clr
| | change_page_attr_set_clr
| | _set_memory_wb
| | ioremap_change_attr
| | kernel_map_sync_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| --1.80%-- [...]
|
|--4.82%-- __get_vm_area_node
| |
| |--99.70%-- get_vm_area_caller
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| | |
| | --100.00%-- 0x0
| --0.30%-- [...]
|
|--4.13%-- iounmap
| |
| |--99.59%-- copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| | |
| | |--50.39%-- 0x45524f4300000001
| | |
| | --49.61%-- 0x0
| --0.41%-- [...]
|
|--3.60%-- read_vmcore
| |
| |--99.83%-- proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| --0.17%-- [...]
|
|--2.24%-- copy_user_generic_string
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--1.92%-- remove_vm_area
| |
| |--99.31%-- iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| | |
| | --100.00%-- 0x0
| |
| --0.69%-- copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--1.82%-- do_kernel_range_flush
| |
| |--99.20%-- on_each_cpu
| | flush_tlb_kernel_range
| | __purge_vmap_area_lazy
| | free_vmap_area_noflush
| | free_unmap_vmap_area
| | remove_vm_area
| | iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| --0.80%-- flush_tlb_kernel_range
| __purge_vmap_area_lazy
| free_vmap_area_noflush
| free_unmap_vmap_area
| remove_vm_area
| iounmap
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--1.01%-- rbt_memtype_erase
| |
| |--96.66%-- free_memtype
| | iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| --3.34%-- iounmap
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--0.87%-- kfree
| |
| |--55.52%-- free_memtype
| | iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| |--29.00%-- iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| |--12.42%-- rcu_do_batch
| | __rcu_process_callbacks
| | rcu_process_callbacks
| | __do_softirq
| | call_softirq
| | do_softirq
| | irq_exit
| | smp_apic_timer_interrupt
| | apic_timer_interrupt
| | |
| | |--20.23%-- free_vmap_area_noflush
| | | free_unmap_vmap_area
| | | remove_vm_area
| | | iounmap
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--19.11%-- __ioremap_caller
| | | ioremap_cache
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--16.82%-- __change_page_attr
| | | __change_page_attr_set_clr
| | | change_page_attr_set_clr
| | | _set_memory_wb
| | | ioremap_change_attr
| | | kernel_map_sync_memtype
| | | __ioremap_caller
| | | ioremap_cache
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--6.75%-- pat_pagerange_is_ram
| | | |
| | | |--66.67%-- reserve_memtype
| | | | __ioremap_caller
| | | | ioremap_cache
| | | | copy_oldmem_page
| | | | read_from_oldmem
| | | | read_vmcore
| | | | proc_reg_read
| | | | vfs_read
| | | | sys_read
| | | | system_call_fastpath
| | | | __read_nocancel
| | | |
| | | --33.33%-- free_memtype
| | | iounmap
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--5.62%-- vm_unmap_aliases
| | | change_page_attr_set_clr
| | | _set_memory_wb
| | | ioremap_change_attr
| | | kernel_map_sync_memtype
| | | __ioremap_caller
| | | ioremap_cache
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--4.50%-- proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--4.49%-- copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--3.37%-- get_vm_area_caller
| | | __ioremap_caller
| | | ioremap_cache
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--3.37%-- readmem
| | |
| | |--2.25%-- page_is_ram
| | | __ioremap_caller
| | | ioremap_cache
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--2.25%-- __exclude_unnecessary_pages
| | | exclude_unnecessary_pages_cyclic
| | | writeout_dumpfile
| | | 0x7fff6c26de6d
| | | 0x64656b616d2f6873
| | |
| | |--2.25%-- paddr_to_offset
| | | exclude_unnecessary_pages_cyclic
| | | |
| | | --100.00%-- writeout_dumpfile
| | | 0x7fff6c26de6d
| | | 0x64656b616d2f6873
| | |
| | |--1.13%-- try_preserve_large_page
| | | __change_page_attr
| | | __change_page_attr_set_clr
| | | change_page_attr_set_clr
| | | _set_memory_wb
| | | ioremap_change_attr
| | | kernel_map_sync_memtype
| | | __ioremap_caller
| | | ioremap_cache
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--1.12%-- reserve_memtype
| | | __ioremap_caller
| | | ioremap_cache
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--1.12%-- __lseek_nocancel
| | |
| | |--1.12%-- proc_reg_llseek
| | | vfs_llseek
| | | sys_lseek
| | | system_call_fastpath
| | | __lseek_nocancel
| | |
| | |--1.12%-- free_memtype
| | | iounmap
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--1.12%-- on_each_cpu
| | | flush_tlb_kernel_range
| | | __purge_vmap_area_lazy
| | | free_vmap_area_noflush
| | | free_unmap_vmap_area
| | | remove_vm_area
| | | iounmap
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | |--1.12%-- __get_vm_area_node
| | | get_vm_area_caller
| | | __ioremap_caller
| | | ioremap_cache
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | |
| | --1.12%-- vtop4_x86_64
| |
| |--2.09%-- copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| --0.98%-- __rcu_process_callbacks
| rcu_process_callbacks
| __do_softirq
| call_softirq
| do_softirq
| irq_exit
| smp_apic_timer_interrupt
| apic_timer_interrupt
| |
| |--57.11%-- __change_page_attr
| | __change_page_attr_set_clr
| | change_page_attr_set_clr
| | _set_memory_wb
| | ioremap_change_attr
| | kernel_map_sync_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| |--14.30%-- flush_tlb_kernel_range
| | __purge_vmap_area_lazy
| | free_vmap_area_noflush
| | free_unmap_vmap_area
| | remove_vm_area
| | iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| |--14.30%-- free_vmap_area_noflush
| | free_unmap_vmap_area
| | remove_vm_area
| | iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| --14.30%-- copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--0.58%-- __insert_vmap_area
| |
| |--98.32%-- alloc_vmap_area
| | __get_vm_area_node
| | get_vm_area_caller
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| --1.68%-- __get_vm_area_node
| get_vm_area_caller
| __ioremap_caller
| ioremap_cache
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--0.57%-- kmem_cache_alloc_node_trace
| |
| |--55.58%-- __get_vm_area_node
| | get_vm_area_caller
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| |--41.85%-- alloc_vmap_area
| | __get_vm_area_node
| | get_vm_area_caller
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| --2.56%-- get_vm_area_caller
| __ioremap_caller
| ioremap_cache
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--0.54%-- vfs_read
| |
| |--98.21%-- sys_read
| | system_call_fastpath
| | __read_nocancel
| | |
| | --100.00%-- 0x0
| |
| --1.79%-- system_call_fastpath
| __read_nocancel
|
|--0.54%-- memtype_rb_check_conflict
| |
| |--95.54%-- rbt_memtype_check_insert
| | reserve_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| --4.46%-- reserve_memtype
| __ioremap_caller
| ioremap_cache
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--0.51%-- __mtrr_type_lookup
| |
| |--96.91%-- mtrr_type_lookup
| | reserve_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| |
| --3.09%-- reserve_memtype
| __ioremap_caller
| ioremap_cache
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
--11.15%-- [...]
9.19% makedumpfile-cl makedumpfile-cliff
|
|--37.97%-- __exclude_unnecessary_pages
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--18.73%-- set_bitmap_cyclic
| |
| --100.00%-- exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--13.79%-- paddr_to_offset
| |
| --100.00%-- exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--4.71%-- readmem
| |
| --100.00%-- exclude_unnecessary_pages_cyclic
| writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--4.12%-- get_num_dumpable_cyclic
|
|--2.90%-- is_in_same_page
|
|--2.66%-- page_is_buddy_v3
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--2.37%-- clear_bit_on_2nd_bitmap_for_kernel
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--2.35%-- create_1st_bitmap_cyclic
|
|--2.04%-- is_xen_memory
| |
| --100.00%-- exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--2.02%-- vtop4_x86_64
|
|--1.67%-- set_bit_on_1st_bitmap
|
|--1.53%-- clear_bit_on_2nd_bitmap
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--1.25%-- write_kdump_pages_and_bitmap_cyclic
| writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--1.15%-- update_cyclic_region
|
|--0.66%-- vaddr_to_paddr_x86_64
--0.07%-- [...]
0.42% makedumpfile-cl libc.so.6
|
|--40.25%-- __lseek_nocancel
|
|--36.91%-- __read_nocancel
|
|--8.64%-- __GI___libc_read
|
|--5.01%-- __memset_sse2
| |
| --100.00%-- 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--3.90%-- __GI___libc_lseek64
|
|--3.72%-- memcpy
| |
| --100.00%-- writeout_dumpfile
| 0x7fff6c26de6d
| 0x64656b616d2f6873
|
|--0.53%-- memchr
--1.04%-- [...]
0.01% makedumpfile-cl ld-linux-x86-64.so.2
|
|--49.69%-- strcmp
| |
| |--67.41%-- 0x8922974
| | 0x42494c4700342e33
| |
| --32.59%-- 0x9691a75
| 0x42494c4700352e32
|
|--17.46%-- _dl_name_match_p
| _dl_check_all_versions
|
|--16.51%-- do_lookup_x
|
--16.34%-- _dl_lookup_symbol_x
_dl_relocate_object
dl_main
_dl_sysdep_start
0x4156415741e58948
0.00% makedumpfile-cl libstdc++.so.6
|
--- 0x37282bb470
0x3728253b43
0x7fff6c26de6d
0x64656b616d2f6873
0.00% makedumpfile-cl [megaraid_sas]
|
--- megasas_isr
handle_irq_event_percpu
handle_irq_event
handle_edge_irq
handle_irq
do_IRQ
ret_from_intr
__exclude_unnecessary_pages
exclude_unnecessary_pages_cyclic
writeout_dumpfile
0x7fff6c26de6d
0x64656b616d2f6873
0.00% makedumpfile-cl [qla2xxx]
|
--- qla24xx_mbx_completion
qla24xx_msix_default
handle_irq_event_percpu
handle_irq_event
handle_edge_irq
handle_irq
do_IRQ
ret_from_intr
__change_page_attr
__change_page_attr_set_clr
change_page_attr_set_clr
_set_memory_wb
ioremap_change_attr
kernel_map_sync_memtype
__ioremap_caller
ioremap_cache
copy_oldmem_page
read_from_oldmem
read_vmcore
proc_reg_read
vfs_read
sys_read
system_call_fastpath
__read_nocancel
0.00% makedumpfile-cl [jbd2]
|
--- jbd2_journal_start
ext4_dirty_inode
__mark_inode_dirty
update_time
file_update_time
__generic_file_aio_write
generic_file_aio_write
ext4_file_write
do_sync_write
vfs_write
sys_write
system_call_fastpath
__write_nocancel
0xffffff0000003725
[-- Attachment #5: perf_report_kernel.txt --]
[-- Type: Text/Plain, Size: 12367 bytes --]
Failed to open [dm_mirror], continuing without symbols
Failed to open [ext4], continuing without symbols
# ========
# captured on: Fri Dec 7 16:45:46 2012
# hostname : (none)
# os release : 3.7.0-rc8-cliff-bench+
# perf version : 3.7.rc8.3.ge0fb22
# arch : x86_64
# nrcpus online : 1
# nrcpus avail : 1
# cpudesc : Intel(R) Xeon(R) CPU E7- 4820 @ 2.00GHz
# cpuid : GenuineIntel,6,47,2
# total memory : 240104 kB
# cmdline : /var/crash/perf record -g -o /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data2 /var/crash/makedumpfile-cliff --message-level 31 -i /var/crash/vmcoreinfo.txt -N -d 31 /proc/vmcore /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-2
# event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 3 }
# HEADER_CPU_TOPOLOGY info available, use -I to display
# HEADER_NUMA_TOPOLOGY info available, use -I to display
# pmu mappings: cpu = 4, software = 1, tracepoint = 2, uncore_bbox_0 = 15, uncore_bbox_1 = 16, uncore_cbox_0 = 7, uncore_cbox_1 = 8, uncore_cbox_2 = 9, uncore_cbox_3 = 10, uncore_cbox_4 = 11, uncore_cbox_5 = 12, uncore_cbox_6 = 13, uncore_cbox_7 = 14, uncore_mbox_0 = 19, uncore_mbox_1 = 20, uncore_rbox_0 = 21, uncore_rbox_1 = 22, uncore_sbox_0 = 17, uncore_sbox_1 = 18, breakpoint = 5, uncore_ubox = 6, uncore_wbox = 23
# ========
#
# Samples: 5K of event 'cycles'
# Event count (approx.): 1493942335
#
# Overhead Command Shared Object
# ........ ............... ....................
#
51.45% makedumpfile-cl makedumpfile-cliff
|
|--51.45%-- set_bitmap_cyclic
| |
| --100.00%-- exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff0b66fe70
| 0x64656b616d2f6873
|
|--11.66%-- get_num_dumpable_cyclic
|
|--7.96%-- clear_bit_on_2nd_bitmap_for_kernel
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff0b66fe70
| 0x64656b616d2f6873
|
|--6.93%-- create_1st_bitmap_cyclic
|
|--4.52%-- __exclude_unnecessary_pages_kernel
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff0b66fe70
| 0x64656b616d2f6873
|
|--4.35%-- clear_bit_on_2nd_bitmap
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff0b66fe70
| 0x64656b616d2f6873
|
|--4.05%-- set_bit_on_1st_bitmap
|
|--3.63%-- update_cyclic_region
|
|--3.52%-- write_kdump_pages_and_bitmap_cyclic
| writeout_dumpfile
| 0x7fff0b66fe70
| 0x64656b616d2f6873
|
|--1.87%-- is_xen_memory
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff0b66fe70
| 0x64656b616d2f6873
--0.07%-- [...]
47.68% makedumpfile-cl [kernel.kallsyms]
|
|--77.89%-- write_vmcore_get_excludes
| write_vmcore_pfn_lists
| proc_reg_write
| vfs_write
| sys_write
| system_call_fastpath
| __write_nocancel
| exclude_unnecessary_pages_cyclic
| |
| --100.00%-- writeout_dumpfile
| 0x7fff0b66fe70
| 0x64656b616d2f6873
|
|--15.34%-- walk_system_ram_range
| |
| |--96.92%-- page_is_ram
| | __ioremap_caller
| | ioremap_cache
| | |
| | |--99.51%-- write_vmcore_get_memmap
| | | write_vmcore_pfn_lists
| | | proc_reg_write
| | | vfs_write
| | | sys_write
| | | system_call_fastpath
| | | __write_nocancel
| | | 0x7fff0b66fe70
| | | 0x64656b616d2f6873
| | --0.49%-- [...]
| |
| |--2.84%-- pat_pagerange_is_ram
| | |
| | |--58.30%-- free_memtype
| | | iounmap
| | | copy_oldmem_page
| | | read_from_oldmem
| | | read_vmcore
| | | proc_reg_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __read_nocancel
| | | |
| | | --100.00%-- 0x45524f4300000001
| | |
| | --41.70%-- reserve_memtype
| | __ioremap_caller
| | ioremap_cache
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| --0.24%-- [...]
|
|--0.76%-- __purge_vmap_area_lazy
| |
| |--76.20%-- free_vmap_area_noflush
| | free_unmap_vmap_area
| | remove_vm_area
| | iounmap
| | copy_oldmem_page
| | read_from_oldmem
| | read_vmcore
| | proc_reg_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __read_nocancel
| | |
| | |--50.02%-- 0x45524f4300000001
| | |
| | --49.98%-- 0x0
| |
| --23.80%-- vm_unmap_aliases
| change_page_attr_set_clr
| _set_memory_wb
| ioremap_change_attr
| kernel_map_sync_memtype
| __ioremap_caller
| ioremap_cache
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
|
|--0.66%-- iomem_map_sanity_check
| __ioremap_caller
| ioremap_cache
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
| |
| |--50.44%-- 0x45524f4300000001
| |
| --49.56%-- 0x0
|
|--0.51%-- try_preserve_large_page
| __change_page_attr
| __change_page_attr_set_clr
| change_page_attr_set_clr
| _set_memory_wb
| ioremap_change_attr
| kernel_map_sync_memtype
| __ioremap_caller
| ioremap_cache
| copy_oldmem_page
| read_from_oldmem
| read_vmcore
| proc_reg_read
| vfs_read
| sys_read
| system_call_fastpath
| __read_nocancel
--4.84%-- [...]
0.72% makedumpfile-cl libc.so.6
|
|--36.59%-- __memset_sse2
| |
| --100.00%-- 0x7fff0b66fe70
| 0x64656b616d2f6873
|
|--31.88%-- memcpy
| |
| --100.00%-- writeout_dumpfile
| 0x7fff0b66fe70
| 0x64656b616d2f6873
|
|--4.88%-- time
|
|--4.80%-- _IO_file_xsputn@@GLIBC_2.2.5
| 0x7f7e97029000
|
|--2.46%-- _IO_file_init@@GLIBC_2.2.5
|
|--2.45%-- _int_free
|
|--2.45%-- 0x372527ffa0
|
|--2.44%-- _IO_default_xsputn
| 0x71e4ef
|
|--2.42%-- __lseek_nocancel
|
|--2.41%-- _IO_getline_info
|
|--2.41%-- __strlen_sse42
| 0x61705f6769746e6f
|
|--2.41%-- _IO_fgets
| 0x3638343533313d45
|
--2.40%-- vfprintf
fprintf
0.13% makedumpfile-cl ld-linux-x86-64.so.2
|
|--28.61%-- _dl_relocate_object
| dl_main
| _dl_sysdep_start
| 0x4156415741e58948
|
|--28.61%-- do_lookup_x
|
|--14.96%-- strcmp
| 0x6e696c2d646c0036
|
|--14.34%-- _dl_lookup_symbol_x
| _dl_relocate_object
| dl_main
| _dl_sysdep_start
| 0x4156415741e58948
|
--13.48%-- _dl_sort_fini
_dl_fini
exit
0.02% makedumpfile-cl libstdc++.so.6
|
--- std::basic_ios<char, std::char_traits<char> >::init(std::basic_streambuf<char, std::char_traits<char> >*)
0x37284ebbe0
std::basic_ostream<char, std::char_traits<char> >::~basic_ostream()
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] makedumpfile: request the kernel do page scans
2012-12-10 0:59 ` [PATCH] makedumpfile: request the kernel do page scans HATAYAMA Daisuke
@ 2012-12-10 15:36 ` Cliff Wickman
2012-12-20 3:22 ` HATAYAMA Daisuke
2012-12-10 15:43 ` Cliff Wickman
2012-12-10 15:50 ` Cliff Wickman
2 siblings, 1 reply; 7+ messages in thread
From: Cliff Wickman @ 2012-12-10 15:36 UTC (permalink / raw)
To: HATAYAMA Daisuke
Cc: vgoyal, kexec, ptesarik, linux-kernel, kumagai-atsushi,
""@jp.fujitsu.com
[-- Attachment #1: Type: text/plain, Size: 130295 bytes --]
On Mon, Dec 10, 2012 at 09:59:29AM +0900, HATAYAMA Daisuke wrote:
> From: Cliff Wickman <cpw@sgi.com>
> Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
> Date: Mon, 19 Nov 2012 12:07:10 -0600
>
> > On Fri, Nov 16, 2012 at 03:39:44PM -0500, Vivek Goyal wrote:
> >> On Thu, Nov 15, 2012 at 04:52:40PM -0600, Cliff Wickman wrote:
> >> >
> >> > Gentlemen,
> >> >
> >> > I know this is rather late to the game, given all the recent work to speed
> >> > up makedumpfile and reduce the memory that it consumes.
> >> > But I've been experimenting with asking the kernel to scan the page tables
> >> > instead of reading all those page structures through /proc/vmcore.
> >> >
> >> > The results are rather dramatic -- if they weren't I would not presume to
> >> > suggest such a radical path.
> >> > On a small, idle UV system: about 4 sec. versus about 40 sec.
> >> > On a 8TB UV the unnecessary page scan alone takes 4 minutes, vs. about 200 min
> >> > through /proc/vmcore.
> >> >
> >> > I have not compared it to your version 1.5.1, so I don't know if your recent
> >> > work provides similar speedups.
> >>
> >> I guess try 1.5.1-rc. IIUC, we had the logic of going through page tables
> >> but that required one single bitmap to be present and in constrained
> >> memory environment we will not have that.
> >>
> >> That's when this idea came up that scan portion of struct page range,
> >> filter it, dump it and then move on to next range.
> >>
> >> Even after 1.5.1-rc if difference is this dramatic, that means we are
> >> not doing something right in makedumpfile and it needs to be
> >> fixed/optimized.
> >>
> >> But moving the logic to kernel does not make much sense to me at this
> >> point of time untile and unless there is a good explanation that why
> >> user space can't do a good job of what kernel is doing.
> >
> > I tested a patch in which makedumpfile does nothing but scan all the
> > page structures using /proc/vmcore. It is simply reading each consecutive
> > range of page structures in readmem() chunks of 512 structures. And doing
> > nothing more than accumulating a hash total of the 'flags' field in each
> > page (for a sanity check). On my test machine there are 6 blocks of page
> > structures, totaling 12 million structures. This takes 31.1 'units of time'
> > (I won't say seconds, as the speed of the clock seems to be way too fast in
> > the crash kernel). If I increase the buffer size to 5120 structures: 31.0 units.
> > At 51200 structures: 30.9. So buffer size has virtually no effect.
> >
> > I also request the kernel to do the same thing. Each of the 6 requests
> > asks the kernel to scan a range of page structures and accumulate a hash
> > total of the 'flags' field. (And also copy a 10000-element pfn list back
> > to user space, to test that such copies don't add significant overhead.)
> > And the 12 million pages are scanned in 1.6 'units of time'.
> >
> > If I compare the time for actual page scanning (unnecessary pages and
> > free pages) through /proc/vmcore vs. requesting the kernel to do the
> > scanning: 40 units vs. 3.8 units.
> >
> > My conclusion is that makedumpfile's page scanning procedure is extremely
> > dominated by the overhead of copying page structures through /proc/vmcore.
> > And that is about 20x slower than using the kernel to access pages.
>
> I have not tested your patch set on the machine with 2TB due to
> reservation problem, but I already tested it on my local machine with
> 32GB and saw big performance improvement.
>
> I applied your patch set on makedumpfile v1.5.1-rc and added an option
> -N not to dump pages to focus on scanning pages part only.
>
> By this, while scanning pages in user-space took about 25 seconds,
> scanning pages in kernel-space took about 1 second.
>
> During the execution I profiled it using perf record/report and its
> results are attached files.
>
> >From this we can notice that current makedumpfile consumes large part
> of execution time for ioremap and its related processing. copy_to_user
> was less than 2% only relative to a whole processing.
>
> Looking into the codes around read method of /proc/vmcore, its call
> stack can be broken into as follows:
>
> read_vmcore
> read_from_oldmem
> copy_oldmem_page
>
> copy_oldmem_page reads the 1st kernel's memory *per page* using
> ioremap_cache and after completing it, immediately unmaps the remapped
> address using iounmap.
>
> Because ioremap/iounmap is called *per page*, this number of calling
> ioremap throught scanning a whole pages is unchanged even if
> makedumpfile's cache size is changed. This seems consistent with
> Cliff's explanation that increasing 512 entries of makedumpfile's
> cache was meaningless.
>
> I think the first step to address this issue is to introduce a kind of
> cache in read_vmcore path to reduce the number of calling
> ioremap/iounmap. Porting scanning logic into kernel-space should be
> considered if it turns out not to work enough.
>
> Thanks.
> HATAYAMA, Daisuke
Hi Hatayama,
If ioremap/iounmap is the bottleneck then perhaps you could do what
my patch does: it consolidates all the ranges of physical addresses
where the boot kernel's page structures reside (see make_kernel_mmap())
and passes them to the kernel, which then does a handfull of ioremaps's to
cover all of them. Then /proc/vmcore could look up the already-mapped
virtual address.
(also note a kludge in get_mm_sparsemem() that verifies that each section
of the mem_map spans contiguous ranges of page structures. I had
trouble with some sections when I made that assumption)
I'm attaching 3 patches that might be useful in your testing:
- 121210.proc_vmcore2 my current patch that applies to the released
makedumpfile 1.5.1
- 121207.vmcore_pagescans.sles applies to a 3.0.13 kernel
- 121207.vmcore_pagescans.rhel applies to a 2.6.32 kernel
-Cliff
> sadump: does not have partition header
> sadump: read dump device as unknown format
> sadump: unknown format
> LOAD (0)
> phys_start : 1000000
> phys_end : 22f1000
> virt_start : ffffffff81000000
> virt_end : ffffffff822f1000
> LOAD (1)
> phys_start : 10000
> phys_end : 9b000
> virt_start : ffff880000010000
> virt_end : ffff88000009b000
> LOAD (2)
> phys_start : 100000
> phys_end : 27000000
> virt_start : ffff880000100000
> virt_end : ffff880027000000
> LOAD (3)
> phys_start : 37000000
> phys_end : 7b00d000
> virt_start : ffff880037000000
> virt_end : ffff88007b00d000
> LOAD (4)
> phys_start : 100000000
> phys_end : 880000000
> virt_start : ffff880100000000
> virt_end : ffff880880000000
> Linux kdump
> page_size : 4096
> page_size : 4096
>
> max_mapnr : 880000
>
> Buffer size for the cyclic mode: 2228224
>
> num of NODEs : 4
>
>
> Memory type : SPARSEMEM_EX
>
> mem_map (0)
> mem_map : ffffea0000000000
> pfn_start : 0
> pfn_end : 8000
> mem_map (1)
> mem_map : ffffea00001c0000
> pfn_start : 8000
> pfn_end : 10000
> mem_map (2)
> mem_map : ffffea0000380000
> pfn_start : 10000
> pfn_end : 18000
> mem_map (3)
> mem_map : ffffea0000540000
> pfn_start : 18000
> pfn_end : 20000
> mem_map (4)
> mem_map : ffffea0000700000
> pfn_start : 20000
> pfn_end : 28000
> mem_map (5)
> mem_map : ffffea00008c0000
> pfn_start : 28000
> pfn_end : 30000
> mem_map (6)
> mem_map : ffffea0000a80000
> pfn_start : 30000
> pfn_end : 38000
> mem_map (7)
> mem_map : ffffea0000c40000
> pfn_start : 38000
> pfn_end : 40000
> mem_map (8)
> mem_map : ffffea0000e00000
> pfn_start : 40000
> pfn_end : 48000
> mem_map (9)
> mem_map : ffffea0000fc0000
> pfn_start : 48000
> pfn_end : 50000
> mem_map (10)
> mem_map : ffffea0001180000
> pfn_start : 50000
> pfn_end : 58000
> mem_map (11)
> mem_map : ffffea0001340000
> pfn_start : 58000
> pfn_end : 60000
> mem_map (12)
> mem_map : ffffea0001500000
> pfn_start : 60000
> pfn_end : 68000
> mem_map (13)
> mem_map : ffffea00016c0000
> pfn_start : 68000
> pfn_end : 70000
> mem_map (14)
> mem_map : ffffea0001880000
> pfn_start : 70000
> pfn_end : 78000
> mem_map (15)
> mem_map : ffffea0001a40000
> pfn_start : 78000
> pfn_end : 80000
> mem_map (16)
> mem_map : 0
> pfn_start : 80000
> pfn_end : 88000
> mem_map (17)
> mem_map : 0
> pfn_start : 88000
> pfn_end : 90000
> mem_map (18)
> mem_map : 0
> pfn_start : 90000
> pfn_end : 98000
> mem_map (19)
> mem_map : 0
> pfn_start : 98000
> pfn_end : a0000
> mem_map (20)
> mem_map : 0
> pfn_start : a0000
> pfn_end : a8000
> mem_map (21)
> mem_map : 0
> pfn_start : a8000
> pfn_end : b0000
> mem_map (22)
> mem_map : 0
> pfn_start : b0000
> pfn_end : b8000
> mem_map (23)
> mem_map : 0
> pfn_start : b8000
> pfn_end : c0000
> mem_map (24)
> mem_map : 0
> pfn_start : c0000
> pfn_end : c8000
> mem_map (25)
> mem_map : 0
> pfn_start : c8000
> pfn_end : d0000
> mem_map (26)
> mem_map : 0
> pfn_start : d0000
> pfn_end : d8000
> mem_map (27)
> mem_map : 0
> pfn_start : d8000
> pfn_end : e0000
> mem_map (28)
> mem_map : 0
> pfn_start : e0000
> pfn_end : e8000
> mem_map (29)
> mem_map : 0
> pfn_start : e8000
> pfn_end : f0000
> mem_map (30)
> mem_map : 0
> pfn_start : f0000
> pfn_end : f8000
> mem_map (31)
> mem_map : 0
> pfn_start : f8000
> pfn_end : 100000
> mem_map (32)
> mem_map : ffffea0003800000
> pfn_start : 100000
> pfn_end : 108000
> mem_map (33)
> mem_map : ffffea00039c0000
> pfn_start : 108000
> pfn_end : 110000
> mem_map (34)
> mem_map : ffffea0003b80000
> pfn_start : 110000
> pfn_end : 118000
> mem_map (35)
> mem_map : ffffea0003d40000
> pfn_start : 118000
> pfn_end : 120000
> mem_map (36)
> mem_map : ffffea0003f00000
> pfn_start : 120000
> pfn_end : 128000
> mem_map (37)
> mem_map : ffffea00040c0000
> pfn_start : 128000
> pfn_end : 130000
> mem_map (38)
> mem_map : ffffea0004280000
> pfn_start : 130000
> pfn_end : 138000
> mem_map (39)
> mem_map : ffffea0004440000
> pfn_start : 138000
> pfn_end : 140000
> mem_map (40)
> mem_map : ffffea0004600000
> pfn_start : 140000
> pfn_end : 148000
> mem_map (41)
> mem_map : ffffea00047c0000
> pfn_start : 148000
> pfn_end : 150000
> mem_map (42)
> mem_map : ffffea0004980000
> pfn_start : 150000
> pfn_end : 158000
> mem_map (43)
> mem_map : ffffea0004b40000
> pfn_start : 158000
> pfn_end : 160000
> mem_map (44)
> mem_map : ffffea0004d00000
> pfn_start : 160000
> pfn_end : 168000
> mem_map (45)
> mem_map : ffffea0004ec0000
> pfn_start : 168000
> pfn_end : 170000
> mem_map (46)
> mem_map : ffffea0005080000
> pfn_start : 170000
> pfn_end : 178000
> mem_map (47)
> mem_map : ffffea0005240000
> pfn_start : 178000
> pfn_end : 180000
> mem_map (48)
> mem_map : ffffea0005400000
> pfn_start : 180000
> pfn_end : 188000
> mem_map (49)
> mem_map : ffffea00055c0000
> pfn_start : 188000
> pfn_end : 190000
> mem_map (50)
> mem_map : ffffea0005780000
> pfn_start : 190000
> pfn_end : 198000
> mem_map (51)
> mem_map : ffffea0005940000
> pfn_start : 198000
> pfn_end : 1a0000
> mem_map (52)
> mem_map : ffffea0005b00000
> pfn_start : 1a0000
> pfn_end : 1a8000
> mem_map (53)
> mem_map : ffffea0005cc0000
> pfn_start : 1a8000
> pfn_end : 1b0000
> mem_map (54)
> mem_map : ffffea0005e80000
> pfn_start : 1b0000
> pfn_end : 1b8000
> mem_map (55)
> mem_map : ffffea0006040000
> pfn_start : 1b8000
> pfn_end : 1c0000
> mem_map (56)
> mem_map : ffffea0006200000
> pfn_start : 1c0000
> pfn_end : 1c8000
> mem_map (57)
> mem_map : ffffea00063c0000
> pfn_start : 1c8000
> pfn_end : 1d0000
> mem_map (58)
> mem_map : ffffea0006580000
> pfn_start : 1d0000
> pfn_end : 1d8000
> mem_map (59)
> mem_map : ffffea0006740000
> pfn_start : 1d8000
> pfn_end : 1e0000
> mem_map (60)
> mem_map : ffffea0006900000
> pfn_start : 1e0000
> pfn_end : 1e8000
> mem_map (61)
> mem_map : ffffea0006ac0000
> pfn_start : 1e8000
> pfn_end : 1f0000
> mem_map (62)
> mem_map : ffffea0006c80000
> pfn_start : 1f0000
> pfn_end : 1f8000
> mem_map (63)
> mem_map : ffffea0006e40000
> pfn_start : 1f8000
> pfn_end : 200000
> mem_map (64)
> mem_map : ffffea0007000000
> pfn_start : 200000
> pfn_end : 208000
> mem_map (65)
> mem_map : ffffea00071c0000
> pfn_start : 208000
> pfn_end : 210000
> mem_map (66)
> mem_map : ffffea0007380000
> pfn_start : 210000
> pfn_end : 218000
> mem_map (67)
> mem_map : ffffea0007540000
> pfn_start : 218000
> pfn_end : 220000
> mem_map (68)
> mem_map : ffffea0007700000
> pfn_start : 220000
> pfn_end : 228000
> mem_map (69)
> mem_map : ffffea00078c0000
> pfn_start : 228000
> pfn_end : 230000
> mem_map (70)
> mem_map : ffffea0007a80000
> pfn_start : 230000
> pfn_end : 238000
> mem_map (71)
> mem_map : ffffea0007c40000
> pfn_start : 238000
> pfn_end : 240000
> mem_map (72)
> mem_map : ffffea0007e00000
> pfn_start : 240000
> pfn_end : 248000
> mem_map (73)
> mem_map : ffffea0007fc0000
> pfn_start : 248000
> pfn_end : 250000
> mem_map (74)
> mem_map : ffffea0008180000
> pfn_start : 250000
> pfn_end : 258000
> mem_map (75)
> mem_map : ffffea0008340000
> pfn_start : 258000
> pfn_end : 260000
> mem_map (76)
> mem_map : ffffea0008500000
> pfn_start : 260000
> pfn_end : 268000
> mem_map (77)
> mem_map : ffffea00086c0000
> pfn_start : 268000
> pfn_end : 270000
> mem_map (78)
> mem_map : ffffea0008880000
> pfn_start : 270000
> pfn_end : 278000
> mem_map (79)
> mem_map : ffffea0008a40000
> pfn_start : 278000
> pfn_end : 280000
> mem_map (80)
> mem_map : ffffea0008c00000
> pfn_start : 280000
> pfn_end : 288000
> mem_map (81)
> mem_map : ffffea0008dc0000
> pfn_start : 288000
> pfn_end : 290000
> mem_map (82)
> mem_map : ffffea0008f80000
> pfn_start : 290000
> pfn_end : 298000
> mem_map (83)
> mem_map : ffffea0009140000
> pfn_start : 298000
> pfn_end : 2a0000
> mem_map (84)
> mem_map : ffffea0009300000
> pfn_start : 2a0000
> pfn_end : 2a8000
> mem_map (85)
> mem_map : ffffea00094c0000
> pfn_start : 2a8000
> pfn_end : 2b0000
> mem_map (86)
> mem_map : ffffea0009680000
> pfn_start : 2b0000
> pfn_end : 2b8000
> mem_map (87)
> mem_map : ffffea0009840000
> pfn_start : 2b8000
> pfn_end : 2c0000
> mem_map (88)
> mem_map : ffffea0009a00000
> pfn_start : 2c0000
> pfn_end : 2c8000
> mem_map (89)
> mem_map : ffffea0009bc0000
> pfn_start : 2c8000
> pfn_end : 2d0000
> mem_map (90)
> mem_map : ffffea0009d80000
> pfn_start : 2d0000
> pfn_end : 2d8000
> mem_map (91)
> mem_map : ffffea0009f40000
> pfn_start : 2d8000
> pfn_end : 2e0000
> mem_map (92)
> mem_map : ffffea000a100000
> pfn_start : 2e0000
> pfn_end : 2e8000
> mem_map (93)
> mem_map : ffffea000a2c0000
> pfn_start : 2e8000
> pfn_end : 2f0000
> mem_map (94)
> mem_map : ffffea000a480000
> pfn_start : 2f0000
> pfn_end : 2f8000
> mem_map (95)
> mem_map : ffffea000a640000
> pfn_start : 2f8000
> pfn_end : 300000
> mem_map (96)
> mem_map : ffffea000a800000
> pfn_start : 300000
> pfn_end : 308000
> mem_map (97)
> mem_map : ffffea000a9c0000
> pfn_start : 308000
> pfn_end : 310000
> mem_map (98)
> mem_map : ffffea000ab80000
> pfn_start : 310000
> pfn_end : 318000
> mem_map (99)
> mem_map : ffffea000ad40000
> pfn_start : 318000
> pfn_end : 320000
> mem_map (100)
> mem_map : ffffea000af00000
> pfn_start : 320000
> pfn_end : 328000
> mem_map (101)
> mem_map : ffffea000b0c0000
> pfn_start : 328000
> pfn_end : 330000
> mem_map (102)
> mem_map : ffffea000b280000
> pfn_start : 330000
> pfn_end : 338000
> mem_map (103)
> mem_map : ffffea000b440000
> pfn_start : 338000
> pfn_end : 340000
> mem_map (104)
> mem_map : ffffea000b600000
> pfn_start : 340000
> pfn_end : 348000
> mem_map (105)
> mem_map : ffffea000b7c0000
> pfn_start : 348000
> pfn_end : 350000
> mem_map (106)
> mem_map : ffffea000b980000
> pfn_start : 350000
> pfn_end : 358000
> mem_map (107)
> mem_map : ffffea000bb40000
> pfn_start : 358000
> pfn_end : 360000
> mem_map (108)
> mem_map : ffffea000bd00000
> pfn_start : 360000
> pfn_end : 368000
> mem_map (109)
> mem_map : ffffea000bec0000
> pfn_start : 368000
> pfn_end : 370000
> mem_map (110)
> mem_map : ffffea000c080000
> pfn_start : 370000
> pfn_end : 378000
> mem_map (111)
> mem_map : ffffea000c240000
> pfn_start : 378000
> pfn_end : 380000
> mem_map (112)
> mem_map : ffffea000c400000
> pfn_start : 380000
> pfn_end : 388000
> mem_map (113)
> mem_map : ffffea000c5c0000
> pfn_start : 388000
> pfn_end : 390000
> mem_map (114)
> mem_map : ffffea000c780000
> pfn_start : 390000
> pfn_end : 398000
> mem_map (115)
> mem_map : ffffea000c940000
> pfn_start : 398000
> pfn_end : 3a0000
> mem_map (116)
> mem_map : ffffea000cb00000
> pfn_start : 3a0000
> pfn_end : 3a8000
> mem_map (117)
> mem_map : ffffea000ccc0000
> pfn_start : 3a8000
> pfn_end : 3b0000
> mem_map (118)
> mem_map : ffffea000ce80000
> pfn_start : 3b0000
> pfn_end : 3b8000
> mem_map (119)
> mem_map : ffffea000d040000
> pfn_start : 3b8000
> pfn_end : 3c0000
> mem_map (120)
> mem_map : ffffea000d200000
> pfn_start : 3c0000
> pfn_end : 3c8000
> mem_map (121)
> mem_map : ffffea000d3c0000
> pfn_start : 3c8000
> pfn_end : 3d0000
> mem_map (122)
> mem_map : ffffea000d580000
> pfn_start : 3d0000
> pfn_end : 3d8000
> mem_map (123)
> mem_map : ffffea000d740000
> pfn_start : 3d8000
> pfn_end : 3e0000
> mem_map (124)
> mem_map : ffffea000d900000
> pfn_start : 3e0000
> pfn_end : 3e8000
> mem_map (125)
> mem_map : ffffea000dac0000
> pfn_start : 3e8000
> pfn_end : 3f0000
> mem_map (126)
> mem_map : ffffea000dc80000
> pfn_start : 3f0000
> pfn_end : 3f8000
> mem_map (127)
> mem_map : ffffea000de40000
> pfn_start : 3f8000
> pfn_end : 400000
> mem_map (128)
> mem_map : ffffea000e000000
> pfn_start : 400000
> pfn_end : 408000
> mem_map (129)
> mem_map : ffffea000e1c0000
> pfn_start : 408000
> pfn_end : 410000
> mem_map (130)
> mem_map : ffffea000e380000
> pfn_start : 410000
> pfn_end : 418000
> mem_map (131)
> mem_map : ffffea000e540000
> pfn_start : 418000
> pfn_end : 420000
> mem_map (132)
> mem_map : ffffea000e700000
> pfn_start : 420000
> pfn_end : 428000
> mem_map (133)
> mem_map : ffffea000e8c0000
> pfn_start : 428000
> pfn_end : 430000
> mem_map (134)
> mem_map : ffffea000ea80000
> pfn_start : 430000
> pfn_end : 438000
> mem_map (135)
> mem_map : ffffea000ec40000
> pfn_start : 438000
> pfn_end : 440000
> mem_map (136)
> mem_map : ffffea000ee00000
> pfn_start : 440000
> pfn_end : 448000
> mem_map (137)
> mem_map : ffffea000efc0000
> pfn_start : 448000
> pfn_end : 450000
> mem_map (138)
> mem_map : ffffea000f180000
> pfn_start : 450000
> pfn_end : 458000
> mem_map (139)
> mem_map : ffffea000f340000
> pfn_start : 458000
> pfn_end : 460000
> mem_map (140)
> mem_map : ffffea000f500000
> pfn_start : 460000
> pfn_end : 468000
> mem_map (141)
> mem_map : ffffea000f6c0000
> pfn_start : 468000
> pfn_end : 470000
> mem_map (142)
> mem_map : ffffea000f880000
> pfn_start : 470000
> pfn_end : 478000
> mem_map (143)
> mem_map : ffffea000fa40000
> pfn_start : 478000
> pfn_end : 480000
> mem_map (144)
> mem_map : ffffea000fc00000
> pfn_start : 480000
> pfn_end : 488000
> mem_map (145)
> mem_map : ffffea000fdc0000
> pfn_start : 488000
> pfn_end : 490000
> mem_map (146)
> mem_map : ffffea000ff80000
> pfn_start : 490000
> pfn_end : 498000
> mem_map (147)
> mem_map : ffffea0010140000
> pfn_start : 498000
> pfn_end : 4a0000
> mem_map (148)
> mem_map : ffffea0010300000
> pfn_start : 4a0000
> pfn_end : 4a8000
> mem_map (149)
> mem_map : ffffea00104c0000
> pfn_start : 4a8000
> pfn_end : 4b0000
> mem_map (150)
> mem_map : ffffea0010680000
> pfn_start : 4b0000
> pfn_end : 4b8000
> mem_map (151)
> mem_map : ffffea0010840000
> pfn_start : 4b8000
> pfn_end : 4c0000
> mem_map (152)
> mem_map : ffffea0010a00000
> pfn_start : 4c0000
> pfn_end : 4c8000
> mem_map (153)
> mem_map : ffffea0010bc0000
> pfn_start : 4c8000
> pfn_end : 4d0000
> mem_map (154)
> mem_map : ffffea0010d80000
> pfn_start : 4d0000
> pfn_end : 4d8000
> mem_map (155)
> mem_map : ffffea0010f40000
> pfn_start : 4d8000
> pfn_end : 4e0000
> mem_map (156)
> mem_map : ffffea0011100000
> pfn_start : 4e0000
> pfn_end : 4e8000
> mem_map (157)
> mem_map : ffffea00112c0000
> pfn_start : 4e8000
> pfn_end : 4f0000
> mem_map (158)
> mem_map : ffffea0011480000
> pfn_start : 4f0000
> pfn_end : 4f8000
> mem_map (159)
> mem_map : ffffea0011640000
> pfn_start : 4f8000
> pfn_end : 500000
> mem_map (160)
> mem_map : ffffea0011800000
> pfn_start : 500000
> pfn_end : 508000
> mem_map (161)
> mem_map : ffffea00119c0000
> pfn_start : 508000
> pfn_end : 510000
> mem_map (162)
> mem_map : ffffea0011b80000
> pfn_start : 510000
> pfn_end : 518000
> mem_map (163)
> mem_map : ffffea0011d40000
> pfn_start : 518000
> pfn_end : 520000
> mem_map (164)
> mem_map : ffffea0011f00000
> pfn_start : 520000
> pfn_end : 528000
> mem_map (165)
> mem_map : ffffea00120c0000
> pfn_start : 528000
> pfn_end : 530000
> mem_map (166)
> mem_map : ffffea0012280000
> pfn_start : 530000
> pfn_end : 538000
> mem_map (167)
> mem_map : ffffea0012440000
> pfn_start : 538000
> pfn_end : 540000
> mem_map (168)
> mem_map : ffffea0012600000
> pfn_start : 540000
> pfn_end : 548000
> mem_map (169)
> mem_map : ffffea00127c0000
> pfn_start : 548000
> pfn_end : 550000
> mem_map (170)
> mem_map : ffffea0012980000
> pfn_start : 550000
> pfn_end : 558000
> mem_map (171)
> mem_map : ffffea0012b40000
> pfn_start : 558000
> pfn_end : 560000
> mem_map (172)
> mem_map : ffffea0012d00000
> pfn_start : 560000
> pfn_end : 568000
> mem_map (173)
> mem_map : ffffea0012ec0000
> pfn_start : 568000
> pfn_end : 570000
> mem_map (174)
> mem_map : ffffea0013080000
> pfn_start : 570000
> pfn_end : 578000
> mem_map (175)
> mem_map : ffffea0013240000
> pfn_start : 578000
> pfn_end : 580000
> mem_map (176)
> mem_map : ffffea0013400000
> pfn_start : 580000
> pfn_end : 588000
> mem_map (177)
> mem_map : ffffea00135c0000
> pfn_start : 588000
> pfn_end : 590000
> mem_map (178)
> mem_map : ffffea0013780000
> pfn_start : 590000
> pfn_end : 598000
> mem_map (179)
> mem_map : ffffea0013940000
> pfn_start : 598000
> pfn_end : 5a0000
> mem_map (180)
> mem_map : ffffea0013b00000
> pfn_start : 5a0000
> pfn_end : 5a8000
> mem_map (181)
> mem_map : ffffea0013cc0000
> pfn_start : 5a8000
> pfn_end : 5b0000
> mem_map (182)
> mem_map : ffffea0013e80000
> pfn_start : 5b0000
> pfn_end : 5b8000
> mem_map (183)
> mem_map : ffffea0014040000
> pfn_start : 5b8000
> pfn_end : 5c0000
> mem_map (184)
> mem_map : ffffea0014200000
> pfn_start : 5c0000
> pfn_end : 5c8000
> mem_map (185)
> mem_map : ffffea00143c0000
> pfn_start : 5c8000
> pfn_end : 5d0000
> mem_map (186)
> mem_map : ffffea0014580000
> pfn_start : 5d0000
> pfn_end : 5d8000
> mem_map (187)
> mem_map : ffffea0014740000
> pfn_start : 5d8000
> pfn_end : 5e0000
> mem_map (188)
> mem_map : ffffea0014900000
> pfn_start : 5e0000
> pfn_end : 5e8000
> mem_map (189)
> mem_map : ffffea0014ac0000
> pfn_start : 5e8000
> pfn_end : 5f0000
> mem_map (190)
> mem_map : ffffea0014c80000
> pfn_start : 5f0000
> pfn_end : 5f8000
> mem_map (191)
> mem_map : ffffea0014e40000
> pfn_start : 5f8000
> pfn_end : 600000
> mem_map (192)
> mem_map : ffffea0015000000
> pfn_start : 600000
> pfn_end : 608000
> mem_map (193)
> mem_map : ffffea00151c0000
> pfn_start : 608000
> pfn_end : 610000
> mem_map (194)
> mem_map : ffffea0015380000
> pfn_start : 610000
> pfn_end : 618000
> mem_map (195)
> mem_map : ffffea0015540000
> pfn_start : 618000
> pfn_end : 620000
> mem_map (196)
> mem_map : ffffea0015700000
> pfn_start : 620000
> pfn_end : 628000
> mem_map (197)
> mem_map : ffffea00158c0000
> pfn_start : 628000
> pfn_end : 630000
> mem_map (198)
> mem_map : ffffea0015a80000
> pfn_start : 630000
> pfn_end : 638000
> mem_map (199)
> mem_map : ffffea0015c40000
> pfn_start : 638000
> pfn_end : 640000
> mem_map (200)
> mem_map : ffffea0015e00000
> pfn_start : 640000
> pfn_end : 648000
> mem_map (201)
> mem_map : ffffea0015fc0000
> pfn_start : 648000
> pfn_end : 650000
> mem_map (202)
> mem_map : ffffea0016180000
> pfn_start : 650000
> pfn_end : 658000
> mem_map (203)
> mem_map : ffffea0016340000
> pfn_start : 658000
> pfn_end : 660000
> mem_map (204)
> mem_map : ffffea0016500000
> pfn_start : 660000
> pfn_end : 668000
> mem_map (205)
> mem_map : ffffea00166c0000
> pfn_start : 668000
> pfn_end : 670000
> mem_map (206)
> mem_map : ffffea0016880000
> pfn_start : 670000
> pfn_end : 678000
> mem_map (207)
> mem_map : ffffea0016a40000
> pfn_start : 678000
> pfn_end : 680000
> mem_map (208)
> mem_map : ffffea0016c00000
> pfn_start : 680000
> pfn_end : 688000
> mem_map (209)
> mem_map : ffffea0016dc0000
> pfn_start : 688000
> pfn_end : 690000
> mem_map (210)
> mem_map : ffffea0016f80000
> pfn_start : 690000
> pfn_end : 698000
> mem_map (211)
> mem_map : ffffea0017140000
> pfn_start : 698000
> pfn_end : 6a0000
> mem_map (212)
> mem_map : ffffea0017300000
> pfn_start : 6a0000
> pfn_end : 6a8000
> mem_map (213)
> mem_map : ffffea00174c0000
> pfn_start : 6a8000
> pfn_end : 6b0000
> mem_map (214)
> mem_map : ffffea0017680000
> pfn_start : 6b0000
> pfn_end : 6b8000
> mem_map (215)
> mem_map : ffffea0017840000
> pfn_start : 6b8000
> pfn_end : 6c0000
> mem_map (216)
> mem_map : ffffea0017a00000
> pfn_start : 6c0000
> pfn_end : 6c8000
> mem_map (217)
> mem_map : ffffea0017bc0000
> pfn_start : 6c8000
> pfn_end : 6d0000
> mem_map (218)
> mem_map : ffffea0017d80000
> pfn_start : 6d0000
> pfn_end : 6d8000
> mem_map (219)
> mem_map : ffffea0017f40000
> pfn_start : 6d8000
> pfn_end : 6e0000
> mem_map (220)
> mem_map : ffffea0018100000
> pfn_start : 6e0000
> pfn_end : 6e8000
> mem_map (221)
> mem_map : ffffea00182c0000
> pfn_start : 6e8000
> pfn_end : 6f0000
> mem_map (222)
> mem_map : ffffea0018480000
> pfn_start : 6f0000
> pfn_end : 6f8000
> mem_map (223)
> mem_map : ffffea0018640000
> pfn_start : 6f8000
> pfn_end : 700000
> mem_map (224)
> mem_map : ffffea0018800000
> pfn_start : 700000
> pfn_end : 708000
> mem_map (225)
> mem_map : ffffea00189c0000
> pfn_start : 708000
> pfn_end : 710000
> mem_map (226)
> mem_map : ffffea0018b80000
> pfn_start : 710000
> pfn_end : 718000
> mem_map (227)
> mem_map : ffffea0018d40000
> pfn_start : 718000
> pfn_end : 720000
> mem_map (228)
> mem_map : ffffea0018f00000
> pfn_start : 720000
> pfn_end : 728000
> mem_map (229)
> mem_map : ffffea00190c0000
> pfn_start : 728000
> pfn_end : 730000
> mem_map (230)
> mem_map : ffffea0019280000
> pfn_start : 730000
> pfn_end : 738000
> mem_map (231)
> mem_map : ffffea0019440000
> pfn_start : 738000
> pfn_end : 740000
> mem_map (232)
> mem_map : ffffea0019600000
> pfn_start : 740000
> pfn_end : 748000
> mem_map (233)
> mem_map : ffffea00197c0000
> pfn_start : 748000
> pfn_end : 750000
> mem_map (234)
> mem_map : ffffea0019980000
> pfn_start : 750000
> pfn_end : 758000
> mem_map (235)
> mem_map : ffffea0019b40000
> pfn_start : 758000
> pfn_end : 760000
> mem_map (236)
> mem_map : ffffea0019d00000
> pfn_start : 760000
> pfn_end : 768000
> mem_map (237)
> mem_map : ffffea0019ec0000
> pfn_start : 768000
> pfn_end : 770000
> mem_map (238)
> mem_map : ffffea001a080000
> pfn_start : 770000
> pfn_end : 778000
> mem_map (239)
> mem_map : ffffea001a240000
> pfn_start : 778000
> pfn_end : 780000
> mem_map (240)
> mem_map : ffffea001a400000
> pfn_start : 780000
> pfn_end : 788000
> mem_map (241)
> mem_map : ffffea001a5c0000
> pfn_start : 788000
> pfn_end : 790000
> mem_map (242)
> mem_map : ffffea001a780000
> pfn_start : 790000
> pfn_end : 798000
> mem_map (243)
> mem_map : ffffea001a940000
> pfn_start : 798000
> pfn_end : 7a0000
> mem_map (244)
> mem_map : ffffea001ab00000
> pfn_start : 7a0000
> pfn_end : 7a8000
> mem_map (245)
> mem_map : ffffea001acc0000
> pfn_start : 7a8000
> pfn_end : 7b0000
> mem_map (246)
> mem_map : ffffea001ae80000
> pfn_start : 7b0000
> pfn_end : 7b8000
> mem_map (247)
> mem_map : ffffea001b040000
> pfn_start : 7b8000
> pfn_end : 7c0000
> mem_map (248)
> mem_map : ffffea001b200000
> pfn_start : 7c0000
> pfn_end : 7c8000
> mem_map (249)
> mem_map : ffffea001b3c0000
> pfn_start : 7c8000
> pfn_end : 7d0000
> mem_map (250)
> mem_map : ffffea001b580000
> pfn_start : 7d0000
> pfn_end : 7d8000
> mem_map (251)
> mem_map : ffffea001b740000
> pfn_start : 7d8000
> pfn_end : 7e0000
> mem_map (252)
> mem_map : ffffea001b900000
> pfn_start : 7e0000
> pfn_end : 7e8000
> mem_map (253)
> mem_map : ffffea001bac0000
> pfn_start : 7e8000
> pfn_end : 7f0000
> mem_map (254)
> mem_map : ffffea001bc80000
> pfn_start : 7f0000
> pfn_end : 7f8000
> mem_map (255)
> mem_map : ffffea001be40000
> pfn_start : 7f8000
> pfn_end : 800000
> mem_map (256)
> mem_map : ffffea001c000000
> pfn_start : 800000
> pfn_end : 808000
> mem_map (257)
> mem_map : ffffea001c1c0000
> pfn_start : 808000
> pfn_end : 810000
> mem_map (258)
> mem_map : ffffea001c380000
> pfn_start : 810000
> pfn_end : 818000
> mem_map (259)
> mem_map : ffffea001c540000
> pfn_start : 818000
> pfn_end : 820000
> mem_map (260)
> mem_map : ffffea001c700000
> pfn_start : 820000
> pfn_end : 828000
> mem_map (261)
> mem_map : ffffea001c8c0000
> pfn_start : 828000
> pfn_end : 830000
> mem_map (262)
> mem_map : ffffea001ca80000
> pfn_start : 830000
> pfn_end : 838000
> mem_map (263)
> mem_map : ffffea001cc40000
> pfn_start : 838000
> pfn_end : 840000
> mem_map (264)
> mem_map : ffffea001ce00000
> pfn_start : 840000
> pfn_end : 848000
> mem_map (265)
> mem_map : ffffea001cfc0000
> pfn_start : 848000
> pfn_end : 850000
> mem_map (266)
> mem_map : ffffea001d180000
> pfn_start : 850000
> pfn_end : 858000
> mem_map (267)
> mem_map : ffffea001d340000
> pfn_start : 858000
> pfn_end : 860000
> mem_map\rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [ 3 %] \rExcluding unnecessary pages : [ 17 %] \rExcluding unnecessary pages : [ 26 %] \rExcluding unnecessary pages : [ 34 %] \rExcluding unnecessary pages : [ 42 %] \rExcluding unnecessary pages : [ 50 %] \rExcluding unnecessary pages : [ 59 %] \rExcluding unnecessary pages : [ 67 %] \rExcluding unnecessary pages : [ 75 %] \rExcluding unnecessary pages : [ 84 %] \rExcluding unnecessary pages : [ 92 %] \rExcluding unnecessary pages : [100 %] \rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [ 13 %] \rExcluding unnecessary pages : [ 22 %] \rExcluding unnecessary pages : [ 30 %] \rExcluding unnecessary pages : [ 38 %] \rExcluding unnecessary pages : [ 47 %] \rExcluding unnecessary pages : [ 55 %] \rExcluding unnecessary pages : [ 63 %] \rExcluding unnecessary pages : [ 71 %] \rExcluding unnecessary pages : [ 80 %] \rExcluding unnecessary pages : [ 88 %] \rExcluding unnecessary pages : [ 96 %] \rExcluding unnecessary pages : [100 %]
> (268)
> mem_map : ffffea001d500000
> pfn_start : 860000
> pfn_end : 868000
> mem_map (269)
> mem_map : ffffea001d6c0000
> pfn_start : 868000
> pfn_end : 870000
> mem_map (270)
> mem_map : ffffea001d880000
> pfn_start : 870000
> pfn_end : 878000
> mem_map (271)
> mem_map : ffffea001da40000
> pfn_start : 878000
> pfn_end : 880000
> STEP [Excluding unnecessary pages] : 11.224292 seconds
> STEP [Excluding unnecessary pages] : 11.250834 seconds
> STEP [Copying data ] : 11.407836 seconds
> Writing erase info...
> offset_eraseinfo: 6c0eb8, size_eraseinfo: 0
>
> Original pages : 0x00000000007ec289
> Excluded pages : 0x00000000007b9efb
> Pages filled with zero : 0x0000000000000000
> Cache pages : 0x0000000000012cff
> Cache pages + private : 0x0000000000012015
> User process data pages : 0x0000000000001ece
> Free pages : 0x0000000000793319
> Remaining pages : 0x000000000003238e
> (The number of pages is reduced to 2%.)
> Memory Hole : 0x0000000000093d77
> --------------------------------------------------
> Total pages : 0x0000000000880000
>
>
> The dumpfile is saved to /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-1.
>
> makedumpfile Completed.
> [ perf record: Woken up 55 times to write data ]
> [ perf record: Captured and wrote 13.735 MB /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data1 (~600084 samples) ]
> sadump: does not have partition header
> sadump: read dump device as unknown format
> sadump: unknown format
> LOAD (0)
> phys_start : 1000000
> phys_end : 22f1000
> virt_start : ffffffff81000000
> virt_end : ffffffff822f1000
> LOAD (1)
> phys_start : 10000
> phys_end : 9b000
> virt_start : ffff880000010000
> virt_end : ffff88000009b000
> LOAD (2)
> phys_start : 100000
> phys_end : 27000000
> virt_start : ffff880000100000
> virt_end : ffff880027000000
> LOAD (3)
> phys_start : 37000000
> phys_end : 7b00d000
> virt_start : ffff880037000000
> virt_end : ffff88007b00d000
> LOAD (4)
> phys_start : 100000000
> phys_end : 880000000
> virt_start : ffff880100000000
> virt_end : ffff880880000000
> Linux kdump
> page_size : 4096
> page_size : 4096
>
> max_mapnr : 880000
>
> Buffer size for the cyclic mode: 2228224
>
> num of NODEs : 4
>
>
> Memory type : SPARSEMEM_EX
>
> mem_map (0)
> mem_map : ffffea0000000000
> pfn_start : 0
> pfn_end : 8000
> mem_map (1)
> mem_map : ffffea00001c0000
> pfn_start : 8000
> pfn_end : 10000
> mem_map (2)
> mem_map : ffffea0000380000
> pfn_start : 10000
> pfn_end : 18000
> mem_map (3)
> mem_map : ffffea0000540000
> pfn_start : 18000
> pfn_end : 20000
> mem_map (4)
> mem_map : ffffea0000700000
> pfn_start : 20000
> pfn_end : 28000
> mem_map (5)
> mem_map : ffffea00008c0000
> pfn_start : 28000
> pfn_end : 30000
> mem_map (6)
> mem_map : ffffea0000a80000
> pfn_start : 30000
> pfn_end : 38000
> mem_map (7)
> mem_map : ffffea0000c40000
> pfn_start : 38000
> pfn_end : 40000
> mem_map (8)
> mem_map : ffffea0000e00000
> pfn_start : 40000
> pfn_end : 48000
> mem_map (9)
> mem_map : ffffea0000fc0000
> pfn_start : 48000
> pfn_end : 50000
> mem_map (10)
> mem_map : ffffea0001180000
> pfn_start : 50000
> pfn_end : 58000
> mem_map (11)
> mem_map : ffffea0001340000
> pfn_start : 58000
> pfn_end : 60000
> mem_map (12)
> mem_map : ffffea0001500000
> pfn_start : 60000
> pfn_end : 68000
> mem_map (13)
> mem_map : ffffea00016c0000
> pfn_start : 68000
> pfn_end : 70000
> mem_map (14)
> mem_map : ffffea0001880000
> pfn_start : 70000
> pfn_end : 78000
> mem_map (15)
> mem_map : ffffea0001a40000
> pfn_start : 78000
> pfn_end : 80000
> mem_map (16)
> mem_map : 0
> pfn_start : 80000
> pfn_end : 88000
> mem_map (17)
> mem_map : 0
> pfn_start : 88000
> pfn_end : 90000
> mem_map (18)
> mem_map : 0
> pfn_start : 90000
> pfn_end : 98000
> mem_map (19)
> mem_map : 0
> pfn_start : 98000
> pfn_end : a0000
> mem_map (20)
> mem_map : 0
> pfn_start : a0000
> pfn_end : a8000
> mem_map (21)
> mem_map : 0
> pfn_start : a8000
> pfn_end : b0000
> mem_map (22)
> mem_map : 0
> pfn_start : b0000
> pfn_end : b8000
> mem_map (23)
> mem_map : 0
> pfn_start : b8000
> pfn_end : c0000
> mem_map (24)
> mem_map : 0
> pfn_start : c0000
> pfn_end : c8000
> mem_map (25)
> mem_map : 0
> pfn_start : c8000
> pfn_end : d0000
> mem_map (26)
> mem_map : 0
> pfn_start : d0000
> pfn_end : d8000
> mem_map (27)
> mem_map : 0
> pfn_start : d8000
> pfn_end : e0000
> mem_map (28)
> mem_map : 0
> pfn_start : e0000
> pfn_end : e8000
> mem_map (29)
> mem_map : 0
> pfn_start : e8000
> pfn_end : f0000
> mem_map (30)
> mem_map : 0
> pfn_start : f0000
> pfn_end : f8000
> mem_map (31)
> mem_map : 0
> pfn_start : f8000
> pfn_end : 100000
> mem_map (32)
> mem_map : ffffea0003800000
> pfn_start : 100000
> pfn_end : 108000
> mem_map (33)
> mem_map : ffffea00039c0000
> pfn_start : 108000
> pfn_end : 110000
> mem_map (34)
> mem_map : ffffea0003b80000
> pfn_start : 110000
> pfn_end : 118000
> mem_map (35)
> mem_map : ffffea0003d40000
> pfn_start : 118000
> pfn_end : 120000
> mem_map (36)
> mem_map : ffffea0003f00000
> pfn_start : 120000
> pfn_end : 128000
> mem_map (37)
> mem_map : ffffea00040c0000
> pfn_start : 128000
> pfn_end : 130000
> mem_map (38)
> mem_map : ffffea0004280000
> pfn_start : 130000
> pfn_end : 138000
> mem_map (39)
> mem_map : ffffea0004440000
> pfn_start : 138000
> pfn_end : 140000
> mem_map (40)
> mem_map : ffffea0004600000
> pfn_start : 140000
> pfn_end : 148000
> mem_map (41)
> mem_map : ffffea00047c0000
> pfn_start : 148000
> pfn_end : 150000
> mem_map (42)
> mem_map : ffffea0004980000
> pfn_start : 150000
> pfn_end : 158000
> mem_map (43)
> mem_map : ffffea0004b40000
> pfn_start : 158000
> pfn_end : 160000
> mem_map (44)
> mem_map : ffffea0004d00000
> pfn_start : 160000
> pfn_end : 168000
> mem_map (45)
> mem_map : ffffea0004ec0000
> pfn_start : 168000
> pfn_end : 170000
> mem_map (46)
> mem_map : ffffea0005080000
> pfn_start : 170000
> pfn_end : 178000
> mem_map (47)
> mem_map : ffffea0005240000
> pfn_start : 178000
> pfn_end : 180000
> mem_map (48)
> mem_map : ffffea0005400000
> pfn_start : 180000
> pfn_end : 188000
> mem_map (49)
> mem_map : ffffea00055c0000
> pfn_start : 188000
> pfn_end : 190000
> mem_map (50)
> mem_map : ffffea0005780000
> pfn_start : 190000
> pfn_end : 198000
> mem_map (51)
> mem_map : ffffea0005940000
> pfn_start : 198000
> pfn_end : 1a0000
> mem_map (52)
> mem_map : ffffea0005b00000
> pfn_start : 1a0000
> pfn_end : 1a8000
> mem_map (53)
> mem_map : ffffea0005cc0000
> pfn_start : 1a8000
> pfn_end : 1b0000
> mem_map (54)
> mem_map : ffffea0005e80000
> pfn_start : 1b0000
> pfn_end : 1b8000
> mem_map (55)
> mem_map : ffffea0006040000
> pfn_start : 1b8000
> pfn_end : 1c0000
> mem_map (56)
> mem_map : ffffea0006200000
> pfn_start : 1c0000
> pfn_end : 1c8000
> mem_map (57)
> mem_map : ffffea00063c0000
> pfn_start : 1c8000
> pfn_end : 1d0000
> mem_map (58)
> mem_map : ffffea0006580000
> pfn_start : 1d0000
> pfn_end : 1d8000
> mem_map (59)
> mem_map : ffffea0006740000
> pfn_start : 1d8000
> pfn_end : 1e0000
> mem_map (60)
> mem_map : ffffea0006900000
> pfn_start : 1e0000
> pfn_end : 1e8000
> mem_map (61)
> mem_map : ffffea0006ac0000
> pfn_start : 1e8000
> pfn_end : 1f0000
> mem_map (62)
> mem_map : ffffea0006c80000
> pfn_start : 1f0000
> pfn_end : 1f8000
> mem_map (63)
> mem_map : ffffea0006e40000
> pfn_start : 1f8000
> pfn_end : 200000
> mem_map (64)
> mem_map : ffffea0007000000
> pfn_start : 200000
> pfn_end : 208000
> mem_map (65)
> mem_map : ffffea00071c0000
> pfn_start : 208000
> pfn_end : 210000
> mem_map (66)
> mem_map : ffffea0007380000
> pfn_start : 210000
> pfn_end : 218000
> mem_map (67)
> mem_map : ffffea0007540000
> pfn_start : 218000
> pfn_end : 220000
> mem_map (68)
> mem_map : ffffea0007700000
> pfn_start : 220000
> pfn_end : 228000
> mem_map (69)
> mem_map : ffffea00078c0000
> pfn_start : 228000
> pfn_end : 230000
> mem_map (70)
> mem_map : ffffea0007a80000
> pfn_start : 230000
> pfn_end : 238000
> mem_map (71)
> mem_map : ffffea0007c40000
> pfn_start : 238000
> pfn_end : 240000
> mem_map (72)
> mem_map : ffffea0007e00000
> pfn_start : 240000
> pfn_end : 248000
> mem_map (73)
> mem_map : ffffea0007fc0000
> pfn_start : 248000
> pfn_end : 250000
> mem_map (74)
> mem_map : ffffea0008180000
> pfn_start : 250000
> pfn_end : 258000
> mem_map (75)
> mem_map : ffffea0008340000
> pfn_start : 258000
> pfn_end : 260000
> mem_map (76)
> mem_map : ffffea0008500000
> pfn_start : 260000
> pfn_end : 268000
> mem_map (77)
> mem_map : ffffea00086c0000
> pfn_start : 268000
> pfn_end : 270000
> mem_map (78)
> mem_map : ffffea0008880000
> pfn_start : 270000
> pfn_end : 278000
> mem_map (79)
> mem_map : ffffea0008a40000
> pfn_start : 278000
> pfn_end : 280000
> mem_map (80)
> mem_map : ffffea0008c00000
> pfn_start : 280000
> pfn_end : 288000
> mem_map (81)
> mem_map : ffffea0008dc0000
> pfn_start : 288000
> pfn_end : 290000
> mem_map (82)
> mem_map : ffffea0008f80000
> pfn_start : 290000
> pfn_end : 298000
> mem_map (83)
> mem_map : ffffea0009140000
> pfn_start : 298000
> pfn_end : 2a0000
> mem_map (84)
> mem_map : ffffea0009300000
> pfn_start : 2a0000
> pfn_end : 2a8000
> mem_map (85)
> mem_map : ffffea00094c0000
> pfn_start : 2a8000
> pfn_end : 2b0000
> mem_map (86)
> mem_map : ffffea0009680000
> pfn_start : 2b0000
> pfn_end : 2b8000
> mem_map (87)
> mem_map : ffffea0009840000
> pfn_start : 2b8000
> pfn_end : 2c0000
> mem_map (88)
> mem_map : ffffea0009a00000
> pfn_start : 2c0000
> pfn_end : 2c8000
> mem_map (89)
> mem_map : ffffea0009bc0000
> pfn_start : 2c8000
> pfn_end : 2d0000
> mem_map (90)
> mem_map : ffffea0009d80000
> pfn_start : 2d0000
> pfn_end : 2d8000
> mem_map (91)
> mem_map : ffffea0009f40000
> pfn_start : 2d8000
> pfn_end : 2e0000
> mem_map (92)
> mem_map : ffffea000a100000
> pfn_start : 2e0000
> pfn_end : 2e8000
> mem_map (93)
> mem_map : ffffea000a2c0000
> pfn_start : 2e8000
> pfn_end : 2f0000
> mem_map (94)
> mem_map : ffffea000a480000
> pfn_start : 2f0000
> pfn_end : 2f8000
> mem_map (95)
> mem_map : ffffea000a640000
> pfn_start : 2f8000
> pfn_end : 300000
> mem_map (96)
> mem_map : ffffea000a800000
> pfn_start : 300000
> pfn_end : 308000
> mem_map (97)
> mem_map : ffffea000a9c0000
> pfn_start : 308000
> pfn_end : 310000
> mem_map (98)
> mem_map : ffffea000ab80000
> pfn_start : 310000
> pfn_end : 318000
> mem_map (99)
> mem_map : ffffea000ad40000
> pfn_start : 318000
> pfn_end : 320000
> mem_map (100)
> mem_map : ffffea000af00000
> pfn_start : 320000
> pfn_end : 328000
> mem_map (101)
> mem_map : ffffea000b0c0000
> pfn_start : 328000
> pfn_end : 330000
> mem_map (102)
> mem_map : ffffea000b280000
> pfn_start : 330000
> pfn_end : 338000
> mem_map (103)
> mem_map : ffffea000b440000
> pfn_start : 338000
> pfn_end : 340000
> mem_map (104)
> mem_map : ffffea000b600000
> pfn_start : 340000
> pfn_end : 348000
> mem_map (105)
> mem_map : ffffea000b7c0000
> pfn_start : 348000
> pfn_end : 350000
> mem_map (106)
> mem_map : ffffea000b980000
> pfn_start : 350000
> pfn_end : 358000
> mem_map (107)
> mem_map : ffffea000bb40000
> pfn_start : 358000
> pfn_end : 360000
> mem_map (108)
> mem_map : ffffea000bd00000
> pfn_start : 360000
> pfn_end : 368000
> mem_map (109)
> mem_map : ffffea000bec0000
> pfn_start : 368000
> pfn_end : 370000
> mem_map (110)
> mem_map : ffffea000c080000
> pfn_start : 370000
> pfn_end : 378000
> mem_map (111)
> mem_map : ffffea000c240000
> pfn_start : 378000
> pfn_end : 380000
> mem_map (112)
> mem_map : ffffea000c400000
> pfn_start : 380000
> pfn_end : 388000
> mem_map (113)
> mem_map : ffffea000c5c0000
> pfn_start : 388000
> pfn_end : 390000
> mem_map (114)
> mem_map : ffffea000c780000
> pfn_start : 390000
> pfn_end : 398000
> mem_map (115)
> mem_map : ffffea000c940000
> pfn_start : 398000
> pfn_end : 3a0000
> mem_map (116)
> mem_map : ffffea000cb00000
> pfn_start : 3a0000
> pfn_end : 3a8000
> mem_map (117)
> mem_map : ffffea000ccc0000
> pfn_start : 3a8000
> pfn_end : 3b0000
> mem_map (118)
> mem_map : ffffea000ce80000
> pfn_start : 3b0000
> pfn_end : 3b8000
> mem_map (119)
> mem_map : ffffea000d040000
> pfn_start : 3b8000
> pfn_end : 3c0000
> mem_map (120)
> mem_map : ffffea000d200000
> pfn_start : 3c0000
> pfn_end : 3c8000
> mem_map (121)
> mem_map : ffffea000d3c0000
> pfn_start : 3c8000
> pfn_end : 3d0000
> mem_map (122)
> mem_map : ffffea000d580000
> pfn_start : 3d0000
> pfn_end : 3d8000
> mem_map (123)
> mem_map : ffffea000d740000
> pfn_start : 3d8000
> pfn_end : 3e0000
> mem_map (124)
> mem_map : ffffea000d900000
> pfn_start : 3e0000
> pfn_end : 3e8000
> mem_map (125)
> mem_map : ffffea000dac0000
> pfn_start : 3e8000
> pfn_end : 3f0000
> mem_map (126)
> mem_map : ffffea000dc80000
> pfn_start : 3f0000
> pfn_end : 3f8000
> mem_map (127)
> mem_map : ffffea000de40000
> pfn_start : 3f8000
> pfn_end : 400000
> mem_map (128)
> mem_map : ffffea000e000000
> pfn_start : 400000
> pfn_end : 408000
> mem_map (129)
> mem_map : ffffea000e1c0000
> pfn_start : 408000
> pfn_end : 410000
> mem_map (130)
> mem_map : ffffea000e380000
> pfn_start : 410000
> pfn_end : 418000
> mem_map (131)
> mem_map : ffffea000e540000
> pfn_start : 418000
> pfn_end : 420000
> mem_map (132)
> mem_map : ffffea000e700000
> pfn_start : 420000
> pfn_end : 428000
> mem_map (133)
> mem_map : ffffea000e8c0000
> pfn_start : 428000
> pfn_end : 430000
> mem_map (134)
> mem_map : ffffea000ea80000
> pfn_start : 430000
> pfn_end : 438000
> mem_map (135)
> mem_map : ffffea000ec40000
> pfn_start : 438000
> pfn_end : 440000
> mem_map (136)
> mem_map : ffffea000ee00000
> pfn_start : 440000
> pfn_end : 448000
> mem_map (137)
> mem_map : ffffea000efc0000
> pfn_start : 448000
> pfn_end : 450000
> mem_map (138)
> mem_map : ffffea000f180000
> pfn_start : 450000
> pfn_end : 458000
> mem_map (139)
> mem_map : ffffea000f340000
> pfn_start : 458000
> pfn_end : 460000
> mem_map (140)
> mem_map : ffffea000f500000
> pfn_start : 460000
> pfn_end : 468000
> mem_map (141)
> mem_map : ffffea000f6c0000
> pfn_start : 468000
> pfn_end : 470000
> mem_map (142)
> mem_map : ffffea000f880000
> pfn_start : 470000
> pfn_end : 478000
> mem_map (143)
> mem_map : ffffea000fa40000
> pfn_start : 478000
> pfn_end : 480000
> mem_map (144)
> mem_map : ffffea000fc00000
> pfn_start : 480000
> pfn_end : 488000
> mem_map (145)
> mem_map : ffffea000fdc0000
> pfn_start : 488000
> pfn_end : 490000
> mem_map (146)
> mem_map : ffffea000ff80000
> pfn_start : 490000
> pfn_end : 498000
> mem_map (147)
> mem_map : ffffea0010140000
> pfn_start : 498000
> pfn_end : 4a0000
> mem_map (148)
> mem_map : ffffea0010300000
> pfn_start : 4a0000
> pfn_end : 4a8000
> mem_map (149)
> mem_map : ffffea00104c0000
> pfn_start : 4a8000
> pfn_end : 4b0000
> mem_map (150)
> mem_map : ffffea0010680000
> pfn_start : 4b0000
> pfn_end : 4b8000
> mem_map (151)
> mem_map : ffffea0010840000
> pfn_start : 4b8000
> pfn_end : 4c0000
> mem_map (152)
> mem_map : ffffea0010a00000
> pfn_start : 4c0000
> pfn_end : 4c8000
> mem_map (153)
> mem_map : ffffea0010bc0000
> pfn_start : 4c8000
> pfn_end : 4d0000
> mem_map (154)
> mem_map : ffffea0010d80000
> pfn_start : 4d0000
> pfn_end : 4d8000
> mem_map (155)
> mem_map : ffffea0010f40000
> pfn_start : 4d8000
> pfn_end : 4e0000
> mem_map (156)
> mem_map : ffffea0011100000
> pfn_start : 4e0000
> pfn_end : 4e8000
> mem_map (157)
> mem_map : ffffea00112c0000
> pfn_start : 4e8000
> pfn_end : 4f0000
> mem_map (158)
> mem_map : ffffea0011480000
> pfn_start : 4f0000
> pfn_end : 4f8000
> mem_map (159)
> mem_map : ffffea0011640000
> pfn_start : 4f8000
> pfn_end : 500000
> mem_map (160)
> mem_map : ffffea0011800000
> pfn_start : 500000
> pfn_end : 508000
> mem_map (161)
> mem_map : ffffea00119c0000
> pfn_start : 508000
> pfn_end : 510000
> mem_map (162)
> mem_map : ffffea0011b80000
> pfn_start : 510000
> pfn_end : 518000
> mem_map (163)
> mem_map : ffffea0011d40000
> pfn_start : 518000
> pfn_end : 520000
> mem_map (164)
> mem_map : ffffea0011f00000
> pfn_start : 520000
> pfn_end : 528000
> mem_map (165)
> mem_map : ffffea00120c0000
> pfn_start : 528000
> pfn_end : 530000
> mem_map (166)
> mem_map : ffffea0012280000
> pfn_start : 530000
> pfn_end : 538000
> mem_map (167)
> mem_map : ffffea0012440000
> pfn_start : 538000
> pfn_end : 540000
> mem_map (168)
> mem_map : ffffea0012600000
> pfn_start : 540000
> pfn_end : 548000
> mem_map (169)
> mem_map : ffffea00127c0000
> pfn_start : 548000
> pfn_end : 550000
> mem_map (170)
> mem_map : ffffea0012980000
> pfn_start : 550000
> pfn_end : 558000
> mem_map (171)
> mem_map : ffffea0012b40000
> pfn_start : 558000
> pfn_end : 560000
> mem_map (172)
> mem_map : ffffea0012d00000
> pfn_start : 560000
> pfn_end : 568000
> mem_map (173)
> mem_map : ffffea0012ec0000
> pfn_start : 568000
> pfn_end : 570000
> mem_map (174)
> mem_map : ffffea0013080000
> pfn_start : 570000
> pfn_end : 578000
> mem_map (175)
> mem_map : ffffea0013240000
> pfn_start : 578000
> pfn_end : 580000
> mem_map (176)
> mem_map : ffffea0013400000
> pfn_start : 580000
> pfn_end : 588000
> mem_map (177)
> mem_map : ffffea00135c0000
> pfn_start : 588000
> pfn_end : 590000
> mem_map (178)
> mem_map : ffffea0013780000
> pfn_start : 590000
> pfn_end : 598000
> mem_map (179)
> mem_map : ffffea0013940000
> pfn_start : 598000
> pfn_end : 5a0000
> mem_map (180)
> mem_map : ffffea0013b00000
> pfn_start : 5a0000
> pfn_end : 5a8000
> mem_map (181)
> mem_map : ffffea0013cc0000
> pfn_start : 5a8000
> pfn_end : 5b0000
> mem_map (182)
> mem_map : ffffea0013e80000
> pfn_start : 5b0000
> pfn_end : 5b8000
> mem_map (183)
> mem_map : ffffea0014040000
> pfn_start : 5b8000
> pfn_end : 5c0000
> mem_map (184)
> mem_map : ffffea0014200000
> pfn_start : 5c0000
> pfn_end : 5c8000
> mem_map (185)
> mem_map : ffffea00143c0000
> pfn_start : 5c8000
> pfn_end : 5d0000
> mem_map (186)
> mem_map : ffffea0014580000
> pfn_start : 5d0000
> pfn_end : 5d8000
> mem_map (187)
> mem_map : ffffea0014740000
> pfn_start : 5d8000
> pfn_end : 5e0000
> mem_map (188)
> mem_map : ffffea0014900000
> pfn_start : 5e0000
> pfn_end : 5e8000
> mem_map (189)
> mem_map : ffffea0014ac0000
> pfn_start : 5e8000
> pfn_end : 5f0000
> mem_map (190)
> mem_map : ffffea0014c80000
> pfn_start : 5f0000
> pfn_end : 5f8000
> mem_map (191)
> mem_map : ffffea0014e40000
> pfn_start : 5f8000
> pfn_end : 600000
> mem_map (192)
> mem_map : ffffea0015000000
> pfn_start : 600000
> pfn_end : 608000
> mem_map (193)
> mem_map : ffffea00151c0000
> pfn_start : 608000
> pfn_end : 610000
> mem_map (194)
> mem_map : ffffea0015380000
> pfn_start : 610000
> pfn_end : 618000
> mem_map (195)
> mem_map : ffffea0015540000
> pfn_start : 618000
> pfn_end : 620000
> mem_map (196)
> mem_map : ffffea0015700000
> pfn_start : 620000
> pfn_end : 628000
> mem_map (197)
> mem_map : ffffea00158c0000
> pfn_start : 628000
> pfn_end : 630000
> mem_map (198)
> mem_map : ffffea0015a80000
> pfn_start : 630000
> pfn_end : 638000
> mem_map (199)
> mem_map : ffffea0015c40000
> pfn_start : 638000
> pfn_end : 640000
> mem_map (200)
> mem_map : ffffea0015e00000
> pfn_start : 640000
> pfn_end : 648000
> mem_map (201)
> mem_map : ffffea0015fc0000
> pfn_start : 648000
> pfn_end : 650000
> mem_map (202)
> mem_map : ffffea0016180000
> pfn_start : 650000
> pfn_end : 658000
> mem_map (203)
> mem_map : ffffea0016340000
> pfn_start : 658000
> pfn_end : 660000
> mem_map (204)
> mem_map : ffffea0016500000
> pfn_start : 660000
> pfn_end : 668000
> mem_map (205)
> mem_map : ffffea00166c0000
> pfn_start : 668000
> pfn_end : 670000
> mem_map (206)
> mem_map : ffffea0016880000
> pfn_start : 670000
> pfn_end : 678000
> mem_map (207)
> mem_map : ffffea0016a40000
> pfn_start : 678000
> pfn_end : 680000
> mem_map (208)
> mem_map : ffffea0016c00000
> pfn_start : 680000
> pfn_end : 688000
> mem_map (209)
> mem_map : ffffea0016dc0000
> pfn_start : 688000
> pfn_end : 690000
> mem_map (210)
> mem_map : ffffea0016f80000
> pfn_start : 690000
> pfn_end : 698000
> mem_map (211)
> mem_map : ffffea0017140000
> pfn_start : 698000
> pfn_end : 6a0000
> mem_map (212)
> mem_map : ffffea0017300000
> pfn_start : 6a0000
> pfn_end : 6a8000
> mem_map (213)
> mem_map : ffffea00174c0000
> pfn_start : 6a8000
> pfn_end : 6b0000
> mem_map (214)
> mem_map : ffffea0017680000
> pfn_start : 6b0000
> pfn_end : 6b8000
> mem_map (215)
> mem_map : ffffea0017840000
> pfn_start : 6b8000
> pfn_end : 6c0000
> mem_map (216)
> mem_map : ffffea0017a00000
> pfn_start : 6c0000
> pfn_end : 6c8000
> mem_map (217)
> mem_map : ffffea0017bc0000
> pfn_start : 6c8000
> pfn_end : 6d0000
> mem_map (218)
> mem_map : ffffea0017d80000
> pfn_start : 6d0000
> pfn_end : 6d8000
> mem_map (219)
> mem_map : ffffea0017f40000
> pfn_start : 6d8000
> pfn_end : 6e0000
> mem_map (220)
> mem_map : ffffea0018100000
> pfn_start : 6e0000
> pfn_end : 6e8000
> mem_map (221)
> mem_map : ffffea00182c0000
> pfn_start : 6e8000
> pfn_end : 6f0000
> mem_map (222)
> mem_map : ffffea0018480000
> pfn_start : 6f0000
> pfn_end : 6f8000
> mem_map (223)
> mem_map : ffffea0018640000
> pfn_start : 6f8000
> pfn_end : 700000
> mem_map (224)
> mem_map : ffffea0018800000
> pfn_start : 700000
> pfn_end : 708000
> mem_map (225)
> mem_map : ffffea00189c0000
> pfn_start : 708000
> pfn_end : 710000
> mem_map (226)
> mem_map : ffffea0018b80000
> pfn_start : 710000
> pfn_end : 718000
> mem_map (227)
> mem_map : ffffea0018d40000
> pfn_start : 718000
> pfn_end : 720000
> mem_map (228)
> mem_map : ffffea0018f00000
> pfn_start : 720000
> pfn_end : 728000
> mem_map (229)
> mem_map : ffffea00190c0000
> pfn_start : 728000
> pfn_end : 730000
> mem_map (230)
> mem_map : ffffea0019280000
> pfn_start : 730000
> pfn_end : 738000
> mem_map (231)
> mem_map : ffffea0019440000
> pfn_start : 738000
> pfn_end : 740000
> mem_map (232)
> mem_map : ffffea0019600000
> pfn_start : 740000
> pfn_end : 748000
> mem_map (233)
> mem_map : ffffea00197c0000
> pfn_start : 748000
> pfn_end : 750000
> mem_map (234)
> mem_map : ffffea0019980000
> pfn_start : 750000
> pfn_end : 758000
> mem_map (235)
> mem_map : ffffea0019b40000
> pfn_start : 758000
> pfn_end : 760000
> mem_map (236)
> mem_map : ffffea0019d00000
> pfn_start : 760000
> pfn_end : 768000
> mem_map (237)
> mem_map : ffffea0019ec0000
> pfn_start : 768000
> pfn_end : 770000
> mem_map (238)
> mem_map : ffffea001a080000
> pfn_start : 770000
> pfn_end : 778000
> mem_map (239)
> mem_map : ffffea001a240000
> pfn_start : 778000
> pfn_end : 780000
> mem_map (240)
> mem_map : ffffea001a400000
> pfn_start : 780000
> pfn_end : 788000
> mem_map (241)
> mem_map : ffffea001a5c0000
> pfn_start : 788000
> pfn_end : 790000
> mem_map (242)
> mem_map : ffffea001a780000
> pfn_start : 790000
> pfn_end : 798000
> mem_map (243)
> mem_map : ffffea001a940000
> pfn_start : 798000
> pfn_end : 7a0000
> mem_map (244)
> mem_map : ffffea001ab00000
> pfn_start : 7a0000
> pfn_end : 7a8000
> mem_map (245)
> mem_map : ffffea001acc0000
> pfn_start : 7a8000
> pfn_end : 7b0000
> mem_map (246)
> mem_map : ffffea001ae80000
> pfn_start : 7b0000
> pfn_end : 7b8000
> mem_map (247)
> mem_map : ffffea001b040000
> pfn_start : 7b8000
> pfn_end : 7c0000
> mem_map (248)
> mem_map : ffffea001b200000
> pfn_start : 7c0000
> pfn_end : 7c8000
> mem_map (249)
> mem_map : ffffea001b3c0000
> pfn_start : 7c8000
> pfn_end : 7d0000
> mem_map (250)
> mem_map : ffffea001b580000
> pfn_start : 7d0000
> pfn_end : 7d8000
> mem_map (251)
> mem_map : ffffea001b740000
> pfn_start : 7d8000
> pfn_end : 7e0000
> mem_map (252)
> mem_map : ffffea001b900000
> pfn_start : 7e0000
> pfn_end : 7e8000
> mem_map (253)
> mem_map : ffffea001bac0000
> pfn_start : 7e8000
> pfn_end : 7f0000
> mem_map (254)
> mem_map : ffffea001bc80000
> pfn_start : 7f0000
> pfn_end : 7f8000
> mem_map (255)
> mem_map : ffffea001be40000
> pfn_start : 7f8000
> pfn_end : 800000
> mem_map (256)
> mem_map : ffffea001c000000
> pfn_start : 800000
> pfn_end : 808000
> mem_map (257)
> mem_map : ffffea001c1c0000
> pfn_start : 808000
> pfn_end : 810000
> mem_map (258)
> mem_map : ffffea001c380000
> pfn_start : 810000
> pfn_end : 818000
> mem_map (259)
> mem_map : ffffea001c540000
> pfn_start : 818000
> pfn_end : 820000
> mem_map (260)
> mem_map : ffffea001c700000
> pfn_start : 820000
> pfn_end : 828000
> mem_map (261)
> mem_map : ffffea001c8c0000
> pfn_start : 828000
> pfn_end : 830000
> mem_map (262)
> mem_map : ffffea001ca80000
> pfn_start : 830000
> pfn_end : 838000
> mem_map (263)
> mem_map : ffffea001cc40000
> pfn_start : 838000
> pfn_end : 840000
> mem_map (264)
> mem_map : ffffea001ce00000
> pfn_start : 840000
> pfn_end : 848000
> mem_map (265)
> mem_map : ffffea001cfc0000
> pfn_start : 848000
> pfn_end : 850000
> mem_map (266)
> mem_map : ffffea001d180000
> pfn_start : 850000
> pfn_end : 858000
> mem_map (267)
> mem_map : ffffea001d340000
> pfn_start : 858000
> pfn_end : 860000
> mem_map\rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [100 %] \rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [100 %]
> (268)
> mem_map : ffffea001d500000
> pfn_start : 860000
> pfn_end : 868000
> mem_map (269)
> mem_map : ffffea001d6c0000
> pfn_start : 868000
> pfn_end : 870000
> mem_map (270)
> mem_map : ffffea001d880000
> pfn_start : 870000
> pfn_end : 878000
> mem_map (271)
> mem_map : ffffea001da40000
> pfn_start : 878000
> pfn_end : 880000
> STEP [Excluding unnecessary pages] : 0.438936 seconds
> STEP [Excluding unnecessary pages] : 0.467304 seconds
> STEP [Copying data ] : 0.624328 seconds
> Writing erase info...
> offset_eraseinfo: 6c0eb8, size_eraseinfo: 0
>
> Original pages : 0x00000000007ec289
> Excluded pages : 0x00000000007b9efb
> Pages filled with zero : 0x0000000000000000
> Cache pages : 0x0000000000012cff
> Cache pages + private : 0x0000000000012015
> User process data pages : 0x0000000000001ece
> Free pages : 0x0000000000793319
> Remaining pages : 0x000000000003238e
> (The number of pages is reduced to 2%.)
> Memory Hole : 0x0000000000093d77
> --------------------------------------------------
> Total pages : 0x0000000000880000
>
>
> The dumpfile is saved to /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-2.
>
> makedumpfile Completed.
> [ perf record: Woken up 3 times to write data ]
> [ perf record: Captured and wrote 0.598 MB /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data2 (~26144 samples) ]
> Failed to open [ext4], continuing without symbols
> No kallsyms or vmlinux with build-id a77a2293aab413880b8b361bb5b863a1680c8eab was found
> [qla2xxx] with build id a77a2293aab413880b8b361bb5b863a1680c8eab not found, continuing without symbols
> Failed to open [dm_mirror], continuing without symbols
> No kallsyms or vmlinux with build-id 8e4a472eadb14fb0cde985ef8571b543880472dd was found
> [megaraid_sas] with build id 8e4a472eadb14fb0cde985ef8571b543880472dd not found, continuing without symbols
> No kallsyms or vmlinux with build-id 93346fc362be38e207aeaae310a339fb502d9acb was found
> [jbd2] with build id 93346fc362be38e207aeaae310a339fb502d9acb not found, continuing without symbols
> # ========
> # captured on: Fri Dec 7 16:45:43 2012
> # hostname : (none)
> # os release : 3.7.0-rc8-cliff-bench+
> # perf version : 3.7.rc8.3.ge0fb22
> # arch : x86_64
> # nrcpus online : 1
> # nrcpus avail : 1
> # cpudesc : Intel(R) Xeon(R) CPU E7- 4820 @ 2.00GHz
> # cpuid : GenuineIntel,6,47,2
> # total memory : 240104 kB
> # cmdline : /var/crash/perf record -g -o /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data1 /var/crash/makedumpfile-cliff --message-level 31 -i /var/crash/vmcoreinfo.txt -N -o -d 31 /proc/vmcore /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-1
> # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 2 }
> # HEADER_CPU_TOPOLOGY info available, use -I to display
> # HEADER_NUMA_TOPOLOGY info available, use -I to display
> # pmu mappings: cpu = 4, software = 1, tracepoint = 2, uncore_bbox_0 = 15, uncore_bbox_1 = 16, uncore_cbox_0 = 7, uncore_cbox_1 = 8, uncore_cbox_2 = 9, uncore_cbox_3 = 10, uncore_cbox_4 = 11, uncore_cbox_5 = 12, uncore_cbox_6 = 13, uncore_cbox_7 = 14, uncore_mbox_0 = 19, uncore_mbox_1 = 20, uncore_rbox_0 = 21, uncore_rbox_1 = 22, uncore_sbox_0 = 17, uncore_sbox_1 = 18, breakpoint = 5, uncore_ubox = 6, uncore_wbox = 23
> # ========
> #
> # Samples: 91K of event 'cycles'
> # Event count (approx.): 23676246537
> #
> # Overhead Command Shared Object
> # ........ ............... ....................
> #
> 90.38% makedumpfile-cl [kernel.kallsyms]
> |
> |--19.73%-- __purge_vmap_area_lazy
> | |
> | |--80.50%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--66.59%-- 0x0
> | | |
> | | --33.41%-- 0x45524f4300000001
> | |
> | |--19.43%-- vm_unmap_aliases
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.07%-- [...]
> |
> |--15.58%-- try_preserve_large_page
> | |
> | |--99.97%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.03%-- [...]
> |
> |--14.51%-- iomem_map_sanity_check
> | |
> | |--99.97%-- __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.01%-- 0x6e6d2f0065726f63
> | | |
> | | --49.99%-- 0x45524f4300000001
> | --0.03%-- [...]
> |
> |--11.06%-- walk_system_ram_range
> | |
> | |--64.71%-- pat_pagerange_is_ram
> | | |
> | | |--50.87%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | --49.13%-- reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--34.75%-- page_is_ram
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.54%-- [...]
> |
> |--4.84%-- __phys_addr
> | |
> | |--52.48%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--45.72%-- try_preserve_large_page
> | | __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --1.80%-- [...]
> |
> |--4.82%-- __get_vm_area_node
> | |
> | |--99.70%-- get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | --0.30%-- [...]
> |
> |--4.13%-- iounmap
> | |
> | |--99.59%-- copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.39%-- 0x45524f4300000001
> | | |
> | | --49.61%-- 0x0
> | --0.41%-- [...]
> |
> |--3.60%-- read_vmcore
> | |
> | |--99.83%-- proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.17%-- [...]
> |
> |--2.24%-- copy_user_generic_string
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.92%-- remove_vm_area
> | |
> | |--99.31%-- iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | |
> | --0.69%-- copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.82%-- do_kernel_range_flush
> | |
> | |--99.20%-- on_each_cpu
> | | flush_tlb_kernel_range
> | | __purge_vmap_area_lazy
> | | free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --0.80%-- flush_tlb_kernel_range
> | __purge_vmap_area_lazy
> | free_vmap_area_noflush
> | free_unmap_vmap_area
> | remove_vm_area
> | iounmap
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.01%-- rbt_memtype_erase
> | |
> | |--96.66%-- free_memtype
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --3.34%-- iounmap
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.87%-- kfree
> | |
> | |--55.52%-- free_memtype
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--29.00%-- iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--12.42%-- rcu_do_batch
> | | __rcu_process_callbacks
> | | rcu_process_callbacks
> | | __do_softirq
> | | call_softirq
> | | do_softirq
> | | irq_exit
> | | smp_apic_timer_interrupt
> | | apic_timer_interrupt
> | | |
> | | |--20.23%-- free_vmap_area_noflush
> | | | free_unmap_vmap_area
> | | | remove_vm_area
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--19.11%-- __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--16.82%-- __change_page_attr
> | | | __change_page_attr_set_clr
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--6.75%-- pat_pagerange_is_ram
> | | | |
> | | | |--66.67%-- reserve_memtype
> | | | | __ioremap_caller
> | | | | ioremap_cache
> | | | | copy_oldmem_page
> | | | | read_from_oldmem
> | | | | read_vmcore
> | | | | proc_reg_read
> | | | | vfs_read
> | | | | sys_read
> | | | | system_call_fastpath
> | | | | __read_nocancel
> | | | |
> | | | --33.33%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--5.62%-- vm_unmap_aliases
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--4.50%-- proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--4.49%-- copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--3.37%-- get_vm_area_caller
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--3.37%-- readmem
> | | |
> | | |--2.25%-- page_is_ram
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--2.25%-- __exclude_unnecessary_pages
> | | | exclude_unnecessary_pages_cyclic
> | | | writeout_dumpfile
> | | | 0x7fff6c26de6d
> | | | 0x64656b616d2f6873
> | | |
> | | |--2.25%-- paddr_to_offset
> | | | exclude_unnecessary_pages_cyclic
> | | | |
> | | | --100.00%-- writeout_dumpfile
> | | | 0x7fff6c26de6d
> | | | 0x64656b616d2f6873
> | | |
> | | |--1.13%-- try_preserve_large_page
> | | | __change_page_attr
> | | | __change_page_attr_set_clr
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- reserve_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- __lseek_nocancel
> | | |
> | | |--1.12%-- proc_reg_llseek
> | | | vfs_llseek
> | | | sys_lseek
> | | | system_call_fastpath
> | | | __lseek_nocancel
> | | |
> | | |--1.12%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- on_each_cpu
> | | | flush_tlb_kernel_range
> | | | __purge_vmap_area_lazy
> | | | free_vmap_area_noflush
> | | | free_unmap_vmap_area
> | | | remove_vm_area
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- __get_vm_area_node
> | | | get_vm_area_caller
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | --1.12%-- vtop4_x86_64
> | |
> | |--2.09%-- copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --0.98%-- __rcu_process_callbacks
> | rcu_process_callbacks
> | __do_softirq
> | call_softirq
> | do_softirq
> | irq_exit
> | smp_apic_timer_interrupt
> | apic_timer_interrupt
> | |
> | |--57.11%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--14.30%-- flush_tlb_kernel_range
> | | __purge_vmap_area_lazy
> | | free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--14.30%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --14.30%-- copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.58%-- __insert_vmap_area
> | |
> | |--98.32%-- alloc_vmap_area
> | | __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --1.68%-- __get_vm_area_node
> | get_vm_area_caller
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.57%-- kmem_cache_alloc_node_trace
> | |
> | |--55.58%-- __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--41.85%-- alloc_vmap_area
> | | __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --2.56%-- get_vm_area_caller
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.54%-- vfs_read
> | |
> | |--98.21%-- sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | |
> | --1.79%-- system_call_fastpath
> | __read_nocancel
> |
> |--0.54%-- memtype_rb_check_conflict
> | |
> | |--95.54%-- rbt_memtype_check_insert
> | | reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --4.46%-- reserve_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.51%-- __mtrr_type_lookup
> | |
> | |--96.91%-- mtrr_type_lookup
> | | reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --3.09%-- reserve_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> --11.15%-- [...]
>
> 9.19% makedumpfile-cl makedumpfile-cliff
> |
> |--37.97%-- __exclude_unnecessary_pages
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--18.73%-- set_bitmap_cyclic
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--13.79%-- paddr_to_offset
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--4.71%-- readmem
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--4.12%-- get_num_dumpable_cyclic
> |
> |--2.90%-- is_in_same_page
> |
> |--2.66%-- page_is_buddy_v3
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.37%-- clear_bit_on_2nd_bitmap_for_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.35%-- create_1st_bitmap_cyclic
> |
> |--2.04%-- is_xen_memory
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.02%-- vtop4_x86_64
> |
> |--1.67%-- set_bit_on_1st_bitmap
> |
> |--1.53%-- clear_bit_on_2nd_bitmap
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--1.25%-- write_kdump_pages_and_bitmap_cyclic
> | writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--1.15%-- update_cyclic_region
> |
> |--0.66%-- vaddr_to_paddr_x86_64
> --0.07%-- [...]
>
> 0.42% makedumpfile-cl libc.so.6
> |
> |--40.25%-- __lseek_nocancel
> |
> |--36.91%-- __read_nocancel
> |
> |--8.64%-- __GI___libc_read
> |
> |--5.01%-- __memset_sse2
> | |
> | --100.00%-- 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--3.90%-- __GI___libc_lseek64
> |
> |--3.72%-- memcpy
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--0.53%-- memchr
> --1.04%-- [...]
>
> 0.01% makedumpfile-cl ld-linux-x86-64.so.2
> |
> |--49.69%-- strcmp
> | |
> | |--67.41%-- 0x8922974
> | | 0x42494c4700342e33
> | |
> | --32.59%-- 0x9691a75
> | 0x42494c4700352e32
> |
> |--17.46%-- _dl_name_match_p
> | _dl_check_all_versions
> |
> |--16.51%-- do_lookup_x
> |
> --16.34%-- _dl_lookup_symbol_x
> _dl_relocate_object
> dl_main
> _dl_sysdep_start
> 0x4156415741e58948
>
> 0.00% makedumpfile-cl libstdc++.so.6
> |
> --- 0x37282bb470
> 0x3728253b43
> 0x7fff6c26de6d
> 0x64656b616d2f6873
>
> 0.00% makedumpfile-cl [megaraid_sas]
> |
> --- megasas_isr
> handle_irq_event_percpu
> handle_irq_event
> handle_edge_irq
> handle_irq
> do_IRQ
> ret_from_intr
> __exclude_unnecessary_pages
> exclude_unnecessary_pages_cyclic
> writeout_dumpfile
> 0x7fff6c26de6d
> 0x64656b616d2f6873
>
> 0.00% makedumpfile-cl [qla2xxx]
> |
> --- qla24xx_mbx_completion
> qla24xx_msix_default
> handle_irq_event_percpu
> handle_irq_event
> handle_edge_irq
> handle_irq
> do_IRQ
> ret_from_intr
> __change_page_attr
> __change_page_attr_set_clr
> change_page_attr_set_clr
> _set_memory_wb
> ioremap_change_attr
> kernel_map_sync_memtype
> __ioremap_caller
> ioremap_cache
> copy_oldmem_page
> read_from_oldmem
> read_vmcore
> proc_reg_read
> vfs_read
> sys_read
> system_call_fastpath
> __read_nocancel
>
> 0.00% makedumpfile-cl [jbd2]
> |
> --- jbd2_journal_start
> ext4_dirty_inode
> __mark_inode_dirty
> update_time
> file_update_time
> __generic_file_aio_write
> generic_file_aio_write
> ext4_file_write
> do_sync_write
> vfs_write
> sys_write
> system_call_fastpath
> __write_nocancel
> 0xffffff0000003725
>
>
>
> Failed to open [dm_mirror], continuing without symbols
> Failed to open [ext4], continuing without symbols
> # ========
> # captured on: Fri Dec 7 16:45:46 2012
> # hostname : (none)
> # os release : 3.7.0-rc8-cliff-bench+
> # perf version : 3.7.rc8.3.ge0fb22
> # arch : x86_64
> # nrcpus online : 1
> # nrcpus avail : 1
> # cpudesc : Intel(R) Xeon(R) CPU E7- 4820 @ 2.00GHz
> # cpuid : GenuineIntel,6,47,2
> # total memory : 240104 kB
> # cmdline : /var/crash/perf record -g -o /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data2 /var/crash/makedumpfile-cliff --message-level 31 -i /var/crash/vmcoreinfo.txt -N -d 31 /proc/vmcore /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-2
> # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 3 }
> # HEADER_CPU_TOPOLOGY info available, use -I to display
> # HEADER_NUMA_TOPOLOGY info available, use -I to display
> # pmu mappings: cpu = 4, software = 1, tracepoint = 2, uncore_bbox_0 = 15, uncore_bbox_1 = 16, uncore_cbox_0 = 7, uncore_cbox_1 = 8, uncore_cbox_2 = 9, uncore_cbox_3 = 10, uncore_cbox_4 = 11, uncore_cbox_5 = 12, uncore_cbox_6 = 13, uncore_cbox_7 = 14, uncore_mbox_0 = 19, uncore_mbox_1 = 20, uncore_rbox_0 = 21, uncore_rbox_1 = 22, uncore_sbox_0 = 17, uncore_sbox_1 = 18, breakpoint = 5, uncore_ubox = 6, uncore_wbox = 23
> # ========
> #
> # Samples: 5K of event 'cycles'
> # Event count (approx.): 1493942335
> #
> # Overhead Command Shared Object
> # ........ ............... ....................
> #
> 51.45% makedumpfile-cl makedumpfile-cliff
> |
> |--51.45%-- set_bitmap_cyclic
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--11.66%-- get_num_dumpable_cyclic
> |
> |--7.96%-- clear_bit_on_2nd_bitmap_for_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--6.93%-- create_1st_bitmap_cyclic
> |
> |--4.52%-- __exclude_unnecessary_pages_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.35%-- clear_bit_on_2nd_bitmap
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.05%-- set_bit_on_1st_bitmap
> |
> |--3.63%-- update_cyclic_region
> |
> |--3.52%-- write_kdump_pages_and_bitmap_cyclic
> | writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--1.87%-- is_xen_memory
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> --0.07%-- [...]
>
> 47.68% makedumpfile-cl [kernel.kallsyms]
> |
> |--77.89%-- write_vmcore_get_excludes
> | write_vmcore_pfn_lists
> | proc_reg_write
> | vfs_write
> | sys_write
> | system_call_fastpath
> | __write_nocancel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--15.34%-- walk_system_ram_range
> | |
> | |--96.92%-- page_is_ram
> | | __ioremap_caller
> | | ioremap_cache
> | | |
> | | |--99.51%-- write_vmcore_get_memmap
> | | | write_vmcore_pfn_lists
> | | | proc_reg_write
> | | | vfs_write
> | | | sys_write
> | | | system_call_fastpath
> | | | __write_nocancel
> | | | 0x7fff0b66fe70
> | | | 0x64656b616d2f6873
> | | --0.49%-- [...]
> | |
> | |--2.84%-- pat_pagerange_is_ram
> | | |
> | | |--58.30%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | | |
> | | | --100.00%-- 0x45524f4300000001
> | | |
> | | --41.70%-- reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.24%-- [...]
> |
> |--0.76%-- __purge_vmap_area_lazy
> | |
> | |--76.20%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.02%-- 0x45524f4300000001
> | | |
> | | --49.98%-- 0x0
> | |
> | --23.80%-- vm_unmap_aliases
> | change_page_attr_set_clr
> | _set_memory_wb
> | ioremap_change_attr
> | kernel_map_sync_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.66%-- iomem_map_sanity_check
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> | |
> | |--50.44%-- 0x45524f4300000001
> | |
> | --49.56%-- 0x0
> |
> |--0.51%-- try_preserve_large_page
> | __change_page_attr
> | __change_page_attr_set_clr
> | change_page_attr_set_clr
> | _set_memory_wb
> | ioremap_change_attr
> | kernel_map_sync_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> --4.84%-- [...]
>
> 0.72% makedumpfile-cl libc.so.6
> |
> |--36.59%-- __memset_sse2
> | |
> | --100.00%-- 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--31.88%-- memcpy
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.88%-- time
> |
> |--4.80%-- _IO_file_xsputn@@GLIBC_2.2.5
> | 0x7f7e97029000
> |
> |--2.46%-- _IO_file_init@@GLIBC_2.2.5
> |
> |--2.45%-- _int_free
> |
> |--2.45%-- 0x372527ffa0
> |
> |--2.44%-- _IO_default_xsputn
> | 0x71e4ef
> |
> |--2.42%-- __lseek_nocancel
> |
> |--2.41%-- _IO_getline_info
> |
> |--2.41%-- __strlen_sse42
> | 0x61705f6769746e6f
> |
> |--2.41%-- _IO_fgets
> | 0x3638343533313d45
> |
> --2.40%-- vfprintf
> fprintf
>
> 0.13% makedumpfile-cl ld-linux-x86-64.so.2
> |
> |--28.61%-- _dl_relocate_object
> | dl_main
> | _dl_sysdep_start
> | 0x4156415741e58948
> |
> |--28.61%-- do_lookup_x
> |
> |--14.96%-- strcmp
> | 0x6e696c2d646c0036
> |
> |--14.34%-- _dl_lookup_symbol_x
> | _dl_relocate_object
> | dl_main
> | _dl_sysdep_start
> | 0x4156415741e58948
> |
> --13.48%-- _dl_sort_fini
> _dl_fini
> exit
>
> 0.02% makedumpfile-cl libstdc++.so.6
> |
> --- std::basic_ios<char, std::char_traits<char> >::init(std::basic_streambuf<char, std::char_traits<char> >*)
> 0x37284ebbe0
> std::basic_ostream<char, std::char_traits<char> >::~basic_ostream()
>
>
>
--
Cliff Wickman
SGI
cpw@sgi.com
(651) 683-3824
[-- Attachment #2: 121210.proc_vmcore2 --]
[-- Type: text/plain, Size: 30805 bytes --]
To: kumagai-atsushi@mxc.nes.nec.co.jp d.hatayama@jp.fujitsu.com
Cc: kexec@lists.infradead.org
Subject: [PATCH] makedumpfile: request the kernel do page scans
From: Cliff Wickman <cpw@sgi.com>
I've been experimenting with asking the kernel to scan the page tables
instead of reading all those page structures through /proc/vmcore.
The results are rather dramatic.
On a small, idle UV: about 4 sec. versus about 40 sec.
On a 8TB UV the unnecessary page scan takes 4 minutes, vs. about 200 min
through /proc/vmcore.
This patch incorporates this scheme into version 1.5.1, so that the cyclic
processing can use the kernel scans.
It also uses the page_is_buddy logic to speed the finding of free pages.
And also allows makedumpfile to work as before with a kernel that does
not provide /proc/vmcore_pfn_lists.
This patch:
- writes requests to new kernel file /proc/vmcore_pfn_lists
- makes request PL_REQUEST_MEMMAP to pass the crash kernel information about
the boot kernel
- makes requests PL_REQUEST_FREE and PL_REQUEST_EXCLUDE, asking the kernel
to return lists of PFNs
- adds page scan timing options -n -o and -t
The patch [PATCH] makedumpfile: fix to exclude_unnecessary_pages_cyclic
is re-done by the below, so that patch should not be applied.
This patch depends on a kernel patch.
Diffed against the released makedumpfile-1.5.1
Signed-off-by: Cliff Wickman <cpw@sgi.com>
---
dwarf_info.c | 2
makedumpfile.c | 523 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
makedumpfile.h | 92 +++++++++-
print_info.c | 5
print_info.h | 3
5 files changed, 601 insertions(+), 24 deletions(-)
Index: makedumpfile-1.5.1.released/makedumpfile.h
===================================================================
--- makedumpfile-1.5.1.released.orig/makedumpfile.h
+++ makedumpfile-1.5.1.released/makedumpfile.h
@@ -86,6 +86,8 @@ int get_mem_type(void);
#define LSEEKED_PDESC (2)
#define LSEEKED_PDATA (3)
+#define EXTRA_MEMMAPS 100
+
/*
* Xen page flags
*/
@@ -418,7 +420,7 @@ do { \
#define KVER_MIN_SHIFT 16
#define KERNEL_VERSION(x,y,z) (((x) << KVER_MAJ_SHIFT) | ((y) << KVER_MIN_SHIFT) | (z))
#define OLDEST_VERSION KERNEL_VERSION(2, 6, 15)/* linux-2.6.15 */
-#define LATEST_VERSION KERNEL_VERSION(3, 6, 7)/* linux-3.6.7 */
+#define LATEST_VERSION KERNEL_VERSION(3, 7, 8)/* linux-3.7.8 */
/*
* vmcoreinfo in /proc/vmcore
@@ -794,9 +796,20 @@ typedef struct {
} xen_crash_info_v2_t;
struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
unsigned long long pfn_start;
unsigned long long pfn_end;
- unsigned long mem_map;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
};
struct dump_bitmap {
@@ -875,6 +888,7 @@ struct DumpInfo {
int flag_rearrange; /* flag of creating dumpfile from
flattened format */
int flag_split; /* splitting vmcore */
+ int flag_use_kernel_lists;
int flag_cyclic; /* cyclic processing to keep memory consumption */
int flag_reassemble; /* reassemble multiple dumpfiles into one */
int flag_refiltering; /* refilter from kdump-compressed file */
@@ -1384,6 +1398,80 @@ struct domain_list {
unsigned int pickled_id;
};
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * limit the size of the pfn list to this many pfn_element structures
+ */
+#define MAX_PFN_LIST 10000
+
+/*
+ * one element in the pfn_list
+ */
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negoiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
#define PAGES_PER_MAPWORD (sizeof(unsigned long) * 8)
#define MFNS_PER_FRAME (info->page_size / sizeof(unsigned long))
Index: makedumpfile-1.5.1.released/dwarf_info.c
===================================================================
--- makedumpfile-1.5.1.released.orig/dwarf_info.c
+++ makedumpfile-1.5.1.released/dwarf_info.c
@@ -324,6 +324,8 @@ get_data_member_location(Dwarf_Die *die,
return TRUE;
}
+int dwarf_formref(Dwarf_Attribute *, Dwarf_Off *);
+
static int
get_die_type(Dwarf_Die *die, Dwarf_Die *die_type)
{
Index: makedumpfile-1.5.1.released/print_info.c
===================================================================
--- makedumpfile-1.5.1.released.orig/print_info.c
+++ makedumpfile-1.5.1.released/print_info.c
@@ -244,6 +244,11 @@ print_usage(void)
MSG(" [-f]:\n");
MSG(" Overwrite DUMPFILE even if it already exists.\n");
MSG("\n");
+ MSG(" [-o]:\n");
+ MSG(" Read page structures from /proc/vmcore in the scan for\n");
+ MSG(" free and excluded pages regardless of whether\n");
+ MSG(" /proc/vmcore_pfn_lists is present.\n");
+ MSG("\n");
MSG(" [-h]:\n");
MSG(" Show help message and LZO/snappy support status (enabled/disabled).\n");
MSG("\n");
Index: makedumpfile-1.5.1.released/print_info.h
===================================================================
--- makedumpfile-1.5.1.released.orig/print_info.h
+++ makedumpfile-1.5.1.released/print_info.h
@@ -43,7 +43,8 @@ void print_execution_time(char *step_nam
*/
#define MIN_MSG_LEVEL (0)
#define MAX_MSG_LEVEL (31)
-#define DEFAULT_MSG_LEVEL (7) /* Print the progress indicator, the
+// cpw: was 7 but add x10 for testing
+#define DEFAULT_MSG_LEVEL (23) /* Print the progress indicator, the
common message, the error message */
#define ML_PRINT_PROGRESS (0x001) /* Print the progress indicator */
#define ML_PRINT_COMMON_MSG (0x002) /* Print the common message */
Index: makedumpfile-1.5.1.released/makedumpfile.c
===================================================================
--- makedumpfile-1.5.1.released.orig/makedumpfile.c
+++ makedumpfile-1.5.1.released/makedumpfile.c
@@ -13,6 +13,8 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
+#define _GNU_SOURCE
+#include <stdio.h>
#include "makedumpfile.h"
#include "print_info.h"
#include "dwarf_info.h"
@@ -31,6 +33,13 @@ struct srcfile_table srcfile_table;
struct vm_table vt = { 0 };
struct DumpInfo *info = NULL;
+int pfn_list_fd;
+struct pfn_element *pfn_list;
+int nflag = 0;
+int oflag = 0;
+int tflag = 0;
+struct timeval scan_start;
+int max_pfn_list;
char filename_stdout[] = FILENAME_STDOUT;
@@ -2415,6 +2424,22 @@ get_mm_sparsemem(void)
unsigned long long pfn_start, pfn_end;
unsigned long section, mem_map;
unsigned long *mem_sec = NULL;
+ unsigned long vaddr;
+ unsigned long paddr;
+ unsigned long lastvaddr;
+ unsigned long lastpaddr;
+ unsigned long diff;
+ long j;
+ int i;
+ int npfns;
+ int pagesize;
+ int num_mem_map;
+ int num_added = 0;
+ struct mem_map_data *mmd;
+ struct mem_map_data *curmmd;
+ struct mem_map_data *work1mmd;
+ struct mem_map_data *work2mmd;
+ struct mem_map_data *lastmmd;
int ret = FALSE;
@@ -2441,7 +2466,8 @@ get_mm_sparsemem(void)
}
info->num_mem_map = num_section;
if ((info->mem_map_data = (struct mem_map_data *)
- malloc(sizeof(struct mem_map_data)*info->num_mem_map)) == NULL) {
+ malloc(sizeof(struct mem_map_data) *
+ (EXTRA_MEMMAPS + info->num_mem_map))) == NULL) {
ERRMSG("Can't allocate memory for the mem_map_data. %s\n",
strerror(errno));
goto out;
@@ -2459,6 +2485,74 @@ get_mm_sparsemem(void)
dump_mem_map(pfn_start, pfn_end, mem_map, section_nr);
}
ret = TRUE;
+
+ /* add paddr to the table */
+ mmd = &info->mem_map_data[0];
+ num_mem_map = info->num_mem_map;
+ lastmmd = mmd + num_mem_map;
+ for (i = 0; i < num_mem_map; i++) {
+ if (mmd[i].mem_map == 0) {
+ mmd[i].paddr = 0;
+ } else {
+ mmd[i].paddr = vaddr_to_paddr(mmd[i].mem_map);
+ if (mmd[i].paddr == 0) {
+ printf("! can't translate %#lx to paddr\n",
+ mmd[i].mem_map);
+ exit(1);
+ }
+ /*
+ * When we pass a mem_map and its paddr to the kernel
+ * it will be ioremap'd assuming the entire range
+ * of pfn's are consecutive. If they are not then
+ * we need to split the range into two.
+ */
+ pagesize = SIZE(page);
+ npfns = mmd[i].pfn_end - mmd[i].pfn_start;
+ vaddr = (unsigned long)mmd[i].mem_map;
+ paddr = vaddr_to_paddr(vaddr);
+ diff = vaddr - paddr;
+ lastvaddr = vaddr + (pagesize * (npfns-1));
+ lastpaddr = vaddr_to_paddr(lastvaddr);
+ if (lastvaddr - lastpaddr != diff) {
+ /* there is a break in vtop somewhere in this range */
+ for (j = 0; j < npfns; j++) {
+ paddr = vaddr_to_paddr(vaddr);
+ if (vaddr - paddr != diff) {
+ diff = vaddr - paddr;
+ /* insert a new entry if we have room */
+ if (num_added < EXTRA_MEMMAPS) {
+ curmmd = &info->mem_map_data[i];
+ num_added++;
+ work1mmd = lastmmd - 1;
+ for (work2mmd = lastmmd;
+ work2mmd > curmmd; work2mmd--) {
+ work1mmd = work2mmd - 1;
+ *work2mmd = *work1mmd;
+ }
+ work2mmd = work1mmd + 1;
+ work1mmd->pfn_end =
+ work1mmd->pfn_start + j;
+ work2mmd->pfn_start =
+ work1mmd->pfn_end;
+ work2mmd->mem_map =
+ work1mmd->mem_map + (pagesize * j);
+ lastmmd++;
+ num_mem_map++;
+ info->num_mem_map++;
+ /*
+ * need only 1 split, the new
+ * one will be checked also.
+ */
+ break;
+ } else
+ printf("warn: out of EXTRA_MEMMAPS\n");
+ }
+ vaddr += pagesize;
+ }
+ }
+ }
+ }
+
out:
if (mem_sec != NULL)
free(mem_sec);
@@ -2571,6 +2665,105 @@ initialize_bitmap_memory(void)
return TRUE;
}
+/*
+ * construct a version of the mem_map_data table to pass to the kernel
+ */
+void *
+make_kernel_mmap(int *kmap_elements, int *kmap_size)
+{
+ int i, j;
+ int elements = 0;
+ int page_structs;
+ int elem;
+ unsigned long base_end_pfn;
+ unsigned long end_paddr;
+ struct mem_map_data *mmdo, *mmdn;
+ struct mem_map_data *mmdbase, *mmdnext, *mmdend, *mmdwork;
+ struct mem_map_data temp_mmd;
+ struct mem_map_data *mmap;
+
+ mmap = malloc(info->num_mem_map * sizeof(struct mem_map_data));
+ if (mmap == NULL) {
+ ERRMSG("Can't allocate memory kernel map\n");
+ return NULL;
+ }
+
+ /* condense them down to the valid ones */
+ for (i = 0, mmdn = mmap, mmdo = &info->mem_map_data[0];
+ i < info->num_mem_map; i++, mmdo++) {
+ if (mmdo->mem_map && mmdo->paddr) {
+ *mmdn = *mmdo;
+ mmdn++;
+ elements++;
+ }
+ }
+
+ /* make sure it is sorted by mem_map (it should be already) */
+ mmdn = mmap;
+ for (i = 0; i < elements - 1; i++) {
+ for (j = i + 1; j < elements; j++) {
+ if (mmdn[j].mem_map < mmdn[i].mem_map) {
+ temp_mmd = mmdn[j];
+ mmdn[j] = mmdn[i];
+ mmdn[i] = temp_mmd;
+ }
+ }
+ }
+
+ /*
+ * consolidate those mem_map's with occupying consecutive physical
+ * addresses
+ * pages represented by these pages structs: addr of page struct
+ * pfns 0x1000000-1008000 mem_map 0xffffea0038000000 paddr 0x11f7e00000
+ * pfns 0x1008000-1010000 mem_map 0xffffea00381c0000 paddr 0x11f7fc0000
+ * pfns 0x1010000-1018000 mem_map 0xffffea0038380000 paddr 0x11f8180000
+ * 8000 increments inc's: 1c0000
+ * 8000000 of memory (128M) 8000 page structs
+ *
+ */
+ mmdbase = mmap;
+ mmdnext = mmap + 1;
+ mmdend = mmap + elements;
+ while (mmdnext < mmdend) {
+ elem = mmdend - mmdnext;
+ /* test mmdbase vs. mmdwork and onward: */
+ for (i = 0, mmdwork = mmdnext; i < elem; i++, mmdwork++) {
+ base_end_pfn = mmdbase->pfn_end;
+ if (base_end_pfn == mmdwork->pfn_start) {
+ page_structs = (mmdbase->pfn_end -
+ mmdbase->pfn_start);
+ end_paddr = (page_structs * SIZE(page))
+ + mmdbase->paddr;
+ if (mmdwork->paddr == end_paddr) {
+ /* extend base by the work one */
+ mmdbase->pfn_end = mmdwork->pfn_end;
+ /* next is where to begin next time */
+ mmdnext = mmdwork + 1;
+ } else {
+ /* gap in address of page
+ structs; end of section */
+ mmdbase++;
+ if (mmdwork - mmdbase > 0)
+ *mmdbase = *mmdwork;
+ mmdnext = mmdwork + 1;
+ break;
+ }
+ } else {
+ /* gap in pfns; end of section */
+ mmdbase++;
+ if (mmdwork - mmdbase > 0)
+ *mmdbase = *mmdwork;
+ mmdnext = mmdwork + 1;
+ break;
+ }
+ }
+ }
+ elements = (mmdbase - mmap) + 1;
+ *kmap_elements = elements;
+ *kmap_size = elements * sizeof(struct mem_map_data);
+ return mmap;
+}
+
int
initial(void)
{
@@ -2833,7 +3026,19 @@ out:
if (!get_value_for_old_linux())
return FALSE;
+ /*
+ * page_is_buddy will tell us whether free pages can be identified
+ * by flags and counts in the page structure without making an extra
+ * pass through the free lists.
+ * This is applicable to using /proc/vmcore or using the kernel.
+ * force all old (-o) forms to search free lists
+ */
+/*
if (info->flag_cyclic && (info->dump_level & DL_EXCLUDE_FREE))
+ if ((info->flag_cyclic || !oflag) &&
+ (info->dump_level & DL_EXCLUDE_FREE))
+*/
+ if (info->dump_level & DL_EXCLUDE_FREE)
setup_page_is_buddy();
return TRUE;
@@ -3549,6 +3754,65 @@ out:
return ret;
}
+/*
+ * let the kernel find excludable pages from one node
+ */
+void
+__exclude_free_pages_kernel(unsigned long pgdat, int node)
+{
+ int i, j, ret, pages;
+ unsigned long pgdat_paddr;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+ struct pfn_element *pe;
+
+ if ((pgdat_paddr = vaddr_to_paddr(pgdat)) == NOT_PADDR) {
+ ERRMSG("Can't convert virtual address(%#lx) to physical.\n",
+ pgdat);
+ return;
+ }
+
+ /*
+ * Get the list of free pages.
+ * This may be broken up into MAX_PFN_list arrays of PFNs.
+ */
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_FREE;
+ request.node = node;
+ request.pgdat_paddr = pgdat_paddr;
+ request.pgdat_vaddr = pgdat;
+ request.reply_ptr = (void *)&reply;
+ request.pfn_list_ptr = (void *)pfn_list;
+ memset(&reply, 0, sizeof(reply));
+
+ do {
+ request.more = 0;
+ if (reply.more) {
+ /* this is to be a continuation of the last request */
+ request.more = 1;
+ request.zone_index = reply.zone_index;
+ request.freearea_index = reply.freearea_index;
+ request.type_index = reply.type_index;
+ request.list_ct = reply.list_ct;
+ }
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret != sizeof(request)) {
+ printf("PL_REQUEST_FREE failed\n");
+ return;
+ }
+ pfn_free += reply.pfn_free;
+
+ for (i = 0; i < reply.in_pfn_list; i++) {
+ pe = &pfn_list[i];
+ pages = (1 << pe->order);
+ for (j = 0; j < pages; j++) {
+ clear_bit_on_2nd_bitmap_for_kernel(pe->pfn + j);
+ }
+ }
+ } while (reply.more);
+
+ return;
+}
int
_exclude_free_page(void)
@@ -3556,6 +3820,7 @@ _exclude_free_page(void)
int i, nr_zones, num_nodes, node;
unsigned long node_zones, zone, spanned_pages, pgdat;
struct timeval tv_start;
+int ct=0;
if ((node = next_online_node(0)) < 0) {
ERRMSG("Can't get next online node.\n");
@@ -3568,7 +3833,24 @@ _exclude_free_page(void)
gettimeofday(&tv_start, NULL);
for (num_nodes = 1; num_nodes <= vt.numnodes; num_nodes++) {
-
+ if (!info->flag_cyclic && info->flag_use_kernel_lists) {
+ node_zones = pgdat + OFFSET(pglist_data.node_zones);
+ if (!readmem(VADDR,
+ pgdat + OFFSET(pglist_data.nr_zones),
+ &nr_zones, sizeof(nr_zones))) {
+ ERRMSG("Can't get nr_zones.\n");
+ return FALSE;
+ }
+ print_progress(PROGRESS_FREE_PAGES, num_nodes - 1,
+ vt.numnodes);
+ /* ask the kernel to do one node */
+ __exclude_free_pages_kernel(pgdat, node);
+ goto next_pgdat;
+ }
+ /*
+ * kernel does not have the pfn_list capability
+ * use the old way
+ */
print_progress(PROGRESS_FREE_PAGES, num_nodes - 1, vt.numnodes);
node_zones = pgdat + OFFSET(pglist_data.node_zones);
@@ -3592,9 +3874,11 @@ _exclude_free_page(void)
}
if (!spanned_pages)
continue;
+ct++;
if (!reset_bitmap_of_free_pages(zone))
return FALSE;
}
+ next_pgdat:
if (num_nodes < vt.numnodes) {
if ((node = next_online_node(node + 1)) < 0) {
ERRMSG("Can't get next online node.\n");
@@ -3612,6 +3896,8 @@ _exclude_free_page(void)
*/
print_progress(PROGRESS_FREE_PAGES, vt.numnodes, vt.numnodes);
print_execution_time(PROGRESS_FREE_PAGES, &tv_start);
+ if (tflag)
+ print_execution_time("Total time", &scan_start);
return TRUE;
}
@@ -3755,7 +4041,6 @@ setup_page_is_buddy(void)
}
} else
info->page_is_buddy = page_is_buddy_v2;
-
out:
if (!info->page_is_buddy)
DEBUG_MSG("Can't select page_is_buddy handler; "
@@ -3964,10 +4249,88 @@ exclude_zero_pages(void)
return TRUE;
}
+/*
+ * let the kernel find excludable pages from one mem_section
+ */
+int
+__exclude_unnecessary_pages_kernel(int mm, struct mem_map_data *mmd)
+{
+ unsigned long long pfn_start = mmd->pfn_start;
+ unsigned long long pfn_end = mmd->pfn_end;
+ int i, j, ret, pages, flag;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+ struct pfn_element *pe;
+
+ /*
+ * Get the list of to-be-excluded pages in this section.
+ * It may be broken up by groups of max_pfn_list size.
+ */
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_EXCLUDE;
+ request.paddr = mmd->paddr; /* phys addr of mem_map */
+ request.reply_ptr = (void *)&reply;
+ request.pfn_list_ptr = (void *)pfn_list;
+ request.exclude_bits = 0;
+ request.pfn_start = pfn_start;
+ request.count = pfn_end - pfn_start;
+ if (info->dump_level & DL_EXCLUDE_CACHE)
+ request.exclude_bits |= DL_EXCLUDE_CACHE;
+ if (info->dump_level & DL_EXCLUDE_CACHE_PRI)
+ request.exclude_bits |= DL_EXCLUDE_CACHE_PRI;
+ if (info->dump_level & DL_EXCLUDE_USER_DATA)
+ request.exclude_bits |= DL_EXCLUDE_USER_DATA;
+ /* if we try for free pages from the freelists then we don't need
+ to ask here for 'buddy' pages */
+ if (info->dump_level & DL_EXCLUDE_FREE)
+ request.exclude_bits |= DL_EXCLUDE_FREE;
+ memset(&reply, 0, sizeof(reply));
+
+ do {
+ /* pfn represented by paddr */
+ request.more = 0;
+ if (reply.more) {
+ /* this is to be a continuation of the last request */
+ request.more = 1;
+ request.map_index = reply.map_index;
+ }
+
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret != sizeof(request))
+ return FALSE;
+
+ pfn_cache += reply.pfn_cache;
+ pfn_cache_private += reply.pfn_cache_private;
+ pfn_user += reply.pfn_user;
+ pfn_free += reply.pfn_free;
+
+ flag = 0;
+ for (i = 0; i < reply.in_pfn_list; i++) {
+ pe = &pfn_list[i];
+ pages = (1 << pe->order);
+ for (j = 0; j < pages; j++) {
+ if (clear_bit_on_2nd_bitmap_for_kernel(
+ pe->pfn + j) == FALSE) {
+ printf("fail: mm %d slot %d pfn %#lx\n",
+ mm, i, pe->pfn + j);
+ printf("paddr %#llx pfn %#llx-%#llx mem_map %#lx\n", mmd->paddr, mmd->pfn_start, mmd->pfn_end, mmd->mem_map);
+ flag = 1;
+ break;
+ }
+ if (flag) break;
+ }
+ }
+ } while (reply.more);
+
+ return TRUE;
+}
+
int
-__exclude_unnecessary_pages(unsigned long mem_map,
- unsigned long long pfn_start, unsigned long long pfn_end)
+__exclude_unnecessary_pages(int mm, struct mem_map_data *mmd)
{
+ unsigned long long pfn_start = mmd->pfn_start;
+ unsigned long long pfn_end = mmd->pfn_end;
+ unsigned long mem_map = mmd->mem_map;
unsigned long long pfn, pfn_mm, maddr;
unsigned long long pfn_read_start, pfn_read_end, index_pg;
unsigned char page_cache[SIZE(page) * PGMM_CACHED];
@@ -3975,6 +4338,12 @@ __exclude_unnecessary_pages(unsigned lon
unsigned int _count, _mapcount = 0;
unsigned long flags, mapping, private = 0;
+ if (info->flag_use_kernel_lists) {
+ if (__exclude_unnecessary_pages_kernel(mm, mmd) == FALSE)
+ return FALSE;
+ return TRUE;
+ }
+
/*
* Refresh the buffer of struct page, when changing mem_map.
*/
@@ -4012,7 +4381,6 @@ __exclude_unnecessary_pages(unsigned lon
pfn_mm = PGMM_CACHED - index_pg;
else
pfn_mm = pfn_end - pfn;
-
if (!readmem(VADDR, mem_map,
page_cache + (index_pg * SIZE(page)),
SIZE(page) * pfn_mm)) {
@@ -4036,7 +4404,6 @@ __exclude_unnecessary_pages(unsigned lon
* Exclude the free page managed by a buddy
*/
if ((info->dump_level & DL_EXCLUDE_FREE)
- && info->flag_cyclic
&& info->page_is_buddy
&& info->page_is_buddy(flags, _mapcount, private, _count)) {
int i;
@@ -4085,19 +4452,78 @@ __exclude_unnecessary_pages(unsigned lon
return TRUE;
}
+/*
+ * Pass in the mem_map_data table.
+ * Must do this once, and before doing PL_REQUEST_FREE or PL_REQUEST_EXCLUDE.
+ */
+int
+setup_kernel_mmap()
+{
+ int ret;
+ int kmap_elements, kmap_size;
+ long malloc_size;
+ void *kmap_addr;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+
+ kmap_addr = make_kernel_mmap(&kmap_elements, &kmap_size);
+ if (kmap_addr == NULL)
+ return FALSE;
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_MEMMAP;
+ request.map_ptr = kmap_addr;
+ request.reply_ptr = (void *)&reply;
+ request.map_count = kmap_elements;
+ request.map_size = kmap_size;
+ request.list_size = MAX_PFN_LIST;
+
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret < 0) {
+ fprintf(stderr, "PL_REQUEST_MEMMAP returned %d\n", ret);
+ return FALSE;
+ }
+ /* the reply tells us how long the kernel's list actually is */
+ max_pfn_list = reply.pfn_list_elements;
+ if (max_pfn_list <= 0) {
+ fprintf(stderr,
+ "PL_REQUEST_MEMMAP returned max_pfn_list %d\n",
+ max_pfn_list);
+ return FALSE;
+ }
+ if (max_pfn_list < MAX_PFN_LIST) {
+ printf("length of pfn list dropped from %d to %d\n",
+ MAX_PFN_LIST, max_pfn_list);
+ }
+ free(kmap_addr);
+ /*
+ * Allocate the buffer for the PFN list (just once).
+ */
+ malloc_size = max_pfn_list * sizeof(struct pfn_element);
+ if ((pfn_list = (struct pfn_element *)malloc(malloc_size)) == NULL) {
+ ERRMSG("Can't allocate pfn_list of %ld\n", malloc_size);
+ return FALSE;
+ }
+ return TRUE;
+}
+
int
exclude_unnecessary_pages(void)
{
- unsigned int mm;
- struct mem_map_data *mmd;
- struct timeval tv_start;
+ unsigned int mm;
+ struct mem_map_data *mmd;
+ struct timeval tv_start;
if (is_xen_memory() && !info->dom0_mapnr) {
ERRMSG("Can't get max domain-0 PFN for excluding pages.\n");
return FALSE;
}
+ if (!info->flag_cyclic && info->flag_use_kernel_lists) {
+ if (setup_kernel_mmap() == FALSE)
+ return FALSE;
+ }
gettimeofday(&tv_start, NULL);
+ gettimeofday(&scan_start, NULL);
for (mm = 0; mm < info->num_mem_map; mm++) {
print_progress(PROGRESS_UNN_PAGES, mm, info->num_mem_map);
@@ -4106,9 +4532,9 @@ exclude_unnecessary_pages(void)
if (mmd->mem_map == NOT_MEMMAP_ADDR)
continue;
-
- if (!__exclude_unnecessary_pages(mmd->mem_map,
- mmd->pfn_start, mmd->pfn_end))
+ if (mmd->paddr == 0)
+ continue;
+ if (!__exclude_unnecessary_pages(mm, mmd))
return FALSE;
}
@@ -4139,7 +4565,11 @@ exclude_unnecessary_pages_cyclic(void)
*/
copy_bitmap_cyclic();
- if ((info->dump_level & DL_EXCLUDE_FREE) && !info->page_is_buddy)
+ /*
+ * If free pages cannot be identified with the buddy flag and/or
+ * count then we have to search free lists.
+ */
+ if ((info->dump_level & DL_EXCLUDE_FREE) && (!info->page_is_buddy))
if (!exclude_free_page())
return FALSE;
@@ -4164,8 +4594,7 @@ exclude_unnecessary_pages_cyclic(void)
if (mmd->pfn_end >= info->cyclic_start_pfn &&
mmd->pfn_start <= info->cyclic_end_pfn) {
- if (!__exclude_unnecessary_pages(mmd->mem_map,
- mmd->pfn_start, mmd->pfn_end))
+ if (!__exclude_unnecessary_pages(mm, mmd))
return FALSE;
}
}
@@ -4195,7 +4624,7 @@ update_cyclic_region(unsigned long long
if (!create_1st_bitmap_cyclic())
return FALSE;
- if (!exclude_unnecessary_pages_cyclic())
+ if (exclude_unnecessary_pages_cyclic() == FALSE)
return FALSE;
return TRUE;
@@ -4255,7 +4684,7 @@ create_2nd_bitmap(void)
if (info->dump_level & DL_EXCLUDE_CACHE ||
info->dump_level & DL_EXCLUDE_CACHE_PRI ||
info->dump_level & DL_EXCLUDE_USER_DATA) {
- if (!exclude_unnecessary_pages()) {
+ if (exclude_unnecessary_pages() == FALSE) {
ERRMSG("Can't exclude unnecessary pages.\n");
return FALSE;
}
@@ -4263,8 +4692,10 @@ create_2nd_bitmap(void)
/*
* Exclude free pages.
+ * If free pages cannot be identified with the buddy flag and/or
+ * count then we have to search free lists.
*/
- if (info->dump_level & DL_EXCLUDE_FREE)
+ if ((info->dump_level & DL_EXCLUDE_FREE) && (!info->page_is_buddy))
if (!exclude_free_page())
return FALSE;
@@ -4395,6 +4826,10 @@ create_dump_bitmap(void)
int ret = FALSE;
if (info->flag_cyclic) {
+ if (info->flag_use_kernel_lists) {
+ if (setup_kernel_mmap() == FALSE)
+ goto out;
+ }
if (!prepare_bitmap_buffer_cyclic())
goto out;
@@ -4872,6 +5307,7 @@ get_num_dumpable_cyclic(void)
{
unsigned long long pfn, num_dumpable=0;
+ gettimeofday(&scan_start, NULL);
for (pfn = 0; pfn < info->max_mapnr; pfn++) {
if (!update_cyclic_region(pfn))
return FALSE;
@@ -5201,7 +5637,7 @@ get_loads_dumpfile_cyclic(void)
info->cyclic_end_pfn = info->pfn_cyclic;
if (!create_1st_bitmap_cyclic())
return FALSE;
- if (!exclude_unnecessary_pages_cyclic())
+ if (exclude_unnecessary_pages_cyclic() == FALSE)
return FALSE;
if (!(phnum = get_phnum_memory()))
@@ -5613,6 +6049,10 @@ write_kdump_pages(struct cache_data *cd_
pfn_zero++;
continue;
}
+
+ if (nflag)
+ continue;
+
/*
* Compress the page data.
*/
@@ -5768,6 +6208,7 @@ write_kdump_pages_cyclic(struct cache_da
for (pfn = start_pfn; pfn < end_pfn; pfn++) {
if ((num_dumped % per) == 0)
+
print_progress(PROGRESS_COPY, num_dumped, info->num_dumpable);
/*
@@ -5786,11 +6227,17 @@ write_kdump_pages_cyclic(struct cache_da
*/
if ((info->dump_level & DL_EXCLUDE_ZERO)
&& is_zero_page(buf, info->page_size)) {
+if (!nflag) {
if (!write_cache(cd_header, pd_zero, sizeof(page_desc_t)))
goto out;
+}
pfn_zero++;
continue;
}
+
+ if (nflag)
+ continue;
+
/*
* Compress the page data.
*/
@@ -6208,6 +6655,8 @@ write_kdump_pages_and_bitmap_cyclic(stru
if (!update_cyclic_region(pfn))
return FALSE;
+ if (tflag)
+ print_execution_time("Total time", &scan_start);
if (!write_kdump_pages_cyclic(cd_header, cd_page, &pd_zero, &offset_data))
return FALSE;
@@ -8231,6 +8680,22 @@ static struct option longopts[] = {
{0, 0, 0, 0}
};
+/*
+ * test for the presence of capability in the kernel to provide lists
+ * of pfn's:
+ * /proc/vmcore_pfn_lists
+ * return 1 for present
+ * return 0 for not present
+ */
+int
+test_kernel_pfn_lists(void)
+{
+ if ((pfn_list_fd = open("/proc/vmcore_pfn_lists", O_WRONLY)) < 0) {
+ return 0;
+ }
+ return 1;
+}
+
int
main(int argc, char *argv[])
{
@@ -8256,7 +8721,7 @@ main(int argc, char *argv[])
info->block_order = DEFAULT_ORDER;
message_level = DEFAULT_MSG_LEVEL;
- while ((opt = getopt_long(argc, argv, "b:cDd:EFfg:hi:lMpRrsvXx:", longopts,
+ while ((opt = getopt_long(argc, argv, "b:cDd:EFfg:hi:MnoRrstVvXx:Y", longopts,
NULL)) != -1) {
switch (opt) {
case 'b':
@@ -8314,6 +8779,13 @@ main(int argc, char *argv[])
case 'M':
info->flag_dmesg = 1;
break;
+ case 'n':
+ /* -n undocumented, for testing page scanning time */
+ nflag = 1;
+ break;
+ case 'o':
+ oflag = 1;
+ break;
case 'p':
info->flag_compress = DUMP_DH_COMPRESSED_SNAPPY;
break;
@@ -8329,6 +8801,9 @@ main(int argc, char *argv[])
case 'r':
info->flag_reassemble = 1;
break;
+ case 't':
+ tflag = 1;
+ break;
case 'V':
info->vaddr_for_vtop = strtoul(optarg, NULL, 0);
break;
@@ -8360,6 +8835,12 @@ main(int argc, char *argv[])
goto out;
}
}
+
+ if (oflag)
+ info->flag_use_kernel_lists = 0;
+ else
+ info->flag_use_kernel_lists = test_kernel_pfn_lists();
+
if (flag_debug)
message_level |= ML_PRINT_DEBUG_MSG;
[-- Attachment #3: 121207.vmcore_pagescans.rhel --]
[-- Type: text/plain, Size: 21607 bytes --]
Subject: [PATCH] scan page tables for makedumpfile
---
fs/proc/vmcore.c | 568 +++++++++++++++++++++++++++++++++++++++++++
include/linux/makedumpfile.h | 115 ++++++++
2 files changed, 683 insertions(+)
Index: linux/fs/proc/vmcore.c
===================================================================
--- linux.orig/fs/proc/vmcore.c
+++ linux/fs/proc/vmcore.c
@@ -17,8 +17,18 @@
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/list.h>
+#include <linux/makedumpfile.h>
+#include <linux/mmzone.h>
#include <asm/uaccess.h>
#include <asm/io.h>
+#include <asm/page.h>
+static int num_mem_map_data = 0;
+static struct mem_map_data *mem_map_data;
+static struct pfn_element *pfn_list;
+static long in_pfn_list;
+static int last_found_vaddr = 0;
+static int last_found_paddr = 0;
+static int max_pfn_list;
/* List representing chunks of contiguous memory areas and their offsets in
* vmcore file.
@@ -33,6 +43,7 @@ static size_t elfcorebuf_sz;
static u64 vmcore_size;
static struct proc_dir_entry *proc_vmcore = NULL;
+static struct proc_dir_entry *proc_vmcore_pfn_lists = NULL;
/* Reads a page from the oldmem device from given offset. */
static ssize_t read_from_oldmem(char *buf, size_t count,
@@ -160,10 +171,563 @@ static ssize_t read_vmcore(struct file *
return acc;
}
+/*
+ * Given the boot-kernel-relative virtual address of a page
+ * return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+unsigned long
+find_local_vaddr(unsigned long orig_vaddr)
+{
+ int i;
+ int fnd = 0;
+ struct mem_map_data *mmd, *next_mmd;
+ unsigned long paddr;
+ unsigned long local_vaddr;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_vaddr, mmd = mem_map_data + last_found_vaddr,
+ next_mmd = mem_map_data + last_found_vaddr + 1;
+ i < num_mem_map_data; i++, mmd++, next_mmd++) {
+ if (mmd->mem_map && mmd->paddr) {
+ if (orig_vaddr >= mmd->mem_map &&
+ orig_vaddr < next_mmd->mem_map) {
+ offset = orig_vaddr - mmd->mem_map;
+ paddr = mmd->paddr + offset;
+ fnd++;
+ /* caching gives about 99% hit on first pass */
+ last_found_vaddr = i;
+ break;
+ }
+ }
+ }
+
+ if (! fnd) {
+ if (last_found_vaddr > 0) {
+ last_found_vaddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+ }
+
+ /* paddr is now the physical address of the page structure */
+ /* and offset is the offset into the found section, and we have
+ a table of how those sections are ioremap_cache'd */
+ local_vaddr = (unsigned long)mmd->section_vaddr + offset;
+ return local_vaddr;
+}
+
+/*
+ * Given a paddr, return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+void *
+find_local_from_paddr(unsigned long paddr)
+{
+ int i;
+ struct mem_map_data *mmd;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_paddr, mmd = mem_map_data + last_found_paddr;
+ i < num_mem_map_data; i++, mmd++) {
+ if ((paddr >= mmd->paddr) && (paddr < mmd->ending_paddr)) {
+ offset = paddr - mmd->paddr;
+ last_found_paddr = i;
+ /* caching gives about 98% hit on first pass */
+ return (void *)(mmd->section_vaddr + offset);
+ }
+ }
+
+ if (last_found_paddr > 0) {
+ last_found_paddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+}
+
+/*
+ * given an anchoring list_head, walk the list of free pages
+ * 'root' is a virtual address based on the ioremap_cache'd pointer pgp
+ * 'boot_root' is the virtual address of the list root, boot kernel relative
+ *
+ * return the number of pages found on the list
+ */
+int
+walk_freelist(struct list_head *root, int node, int zone, int order, int list,
+ int restart_list, int start_page, struct pfn_list_request *reqp,
+ struct pfn_reply *replyp, struct list_head *boot_root)
+{
+ int list_ct = 0;
+ int list_free_pages = 0;
+ int doit;
+ unsigned long start_pfn;
+ struct page *pagep;
+ struct page *local_pagep;
+ struct list_head *lhp;
+ struct list_head *local_lhp; /* crashkernel-relative */
+ struct list_head *prev;
+ struct pfn_element *pe;
+
+ /*
+ * root is the crashkernel-relative address of the anchor of the
+ * free_list.
+ */
+ prev = root;
+ if (root == NULL) {
+ printk(KERN_EMERG "root is null!!, node %d order %d\n",
+ node, order);
+ return 0;
+ }
+
+ if (root->next == boot_root)
+ /* list is empty */
+ return 0;
+
+ lhp = root->next;
+ local_lhp = (struct list_head *)find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp) {
+ return 0;
+ }
+
+ while (local_lhp != boot_root) {
+ list_ct++;
+ if (lhp == NULL) {
+ printk(KERN_EMERG
+ "The free list has a null!!, node %d order %d\n",
+ node, order);
+ break;
+ }
+ if (list_ct > 1 && local_lhp->prev != prev) {
+ /* can't be compared to root, as that is local */
+ printk(KERN_EMERG "The free list is broken!!\n");
+ break;
+ }
+
+ /* we want the boot kernel's pfn that this page represents */
+ pagep = container_of((struct list_head *)lhp,
+ struct page, lru);
+ start_pfn = pagep - vmemmap;
+ local_pagep = container_of((struct list_head *)local_lhp,
+ struct page, lru);
+ doit = 1;
+ if (restart_list && list_ct < start_page)
+ doit = 0;
+ if (doit) {
+ if (in_pfn_list == max_pfn_list) {
+ /* if array would overflow, come back to
+ this page with a continuation */
+ replyp->more = 1;
+ replyp->zone_index = zone;
+ replyp->freearea_index = order;
+ replyp->type_index = list;
+ replyp->list_ct = list_ct;
+ goto list_is_full;
+ }
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = start_pfn;
+ pe->order = order;
+ list_free_pages += (1 << order);
+ }
+ prev = lhp;
+ lhp = local_pagep->lru.next;
+ /* the local node-relative vaddr: */
+ local_lhp = (struct list_head *)
+ find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp)
+ break;
+ }
+
+list_is_full:
+ return list_free_pages;
+}
+
+/*
+ * Return the pfns of free pages on this node
+ */
+int
+write_vmcore_get_free(struct pfn_list_request *reqp)
+{
+ int node;
+ int nr_zones;
+ int nr_orders = MAX_ORDER;
+ int nr_freelist = MIGRATE_TYPES;
+ int zone;
+ int order;
+ int list;
+ int start_zone = 0;
+ int start_order = 0;
+ int start_list = 0;
+ int ret;
+ int restart = 0;
+ int start_page = 0;
+ int node_free_pages = 0;
+ struct pfn_reply rep;
+ struct pglist_data *pgp;
+ struct zone *zonep;
+ struct free_area *fap;
+ struct list_head *flp;
+ struct list_head *boot_root;
+ unsigned long pgdat_paddr;
+ unsigned long pgdat_vaddr;
+ unsigned long page_aligned_pgdat;
+ unsigned long page_aligned_size;
+ void *mapped_vaddr;
+
+ node = reqp->node;
+ pgdat_paddr = reqp->pgdat_paddr;
+ pgdat_vaddr = reqp->pgdat_vaddr;
+
+ /* map this pglist_data structure within a page-aligned area */
+ page_aligned_pgdat = pgdat_paddr & ~(PAGE_SIZE - 1);
+ page_aligned_size = sizeof(struct pglist_data) +
+ (pgdat_paddr - page_aligned_pgdat);
+ page_aligned_size = ((page_aligned_size + (PAGE_SIZE - 1))
+ >> PAGE_SHIFT) << PAGE_SHIFT;
+ mapped_vaddr = ioremap_cache(page_aligned_pgdat, page_aligned_size);
+ if (!mapped_vaddr) {
+ printk("ioremap_cache of pgdat %#lx failed\n",
+ page_aligned_pgdat);
+ return -EINVAL;
+ }
+ pgp = (struct pglist_data *)(mapped_vaddr +
+ (pgdat_paddr - page_aligned_pgdat));
+ nr_zones = pgp->nr_zones;
+ memset(&rep, 0, sizeof(rep));
+
+ if (reqp->more) {
+ restart = 1;
+ start_zone = reqp->zone_index;
+ start_order = reqp->freearea_index;
+ start_list = reqp->type_index;
+ start_page = reqp->list_ct;
+ }
+
+ in_pfn_list = 0;
+ for (zone = start_zone; zone < nr_zones; zone++) {
+ zonep = &pgp->node_zones[zone];
+ for (order = start_order; order < nr_orders; order++) {
+ fap = &zonep->free_area[order];
+ /* some free_area's are all zero */
+ if (fap->nr_free) {
+ for (list = start_list; list < nr_freelist;
+ list++) {
+ flp = &fap->free_list[list];
+ boot_root = (struct list_head *)
+ (pgdat_vaddr +
+ ((unsigned long)flp -
+ (unsigned long)pgp));
+ ret = walk_freelist(flp, node, zone,
+ order, list, restart,
+ start_page, reqp, &rep,
+ boot_root);
+ node_free_pages += ret;
+ restart = 0;
+ if (rep.more)
+ goto list_full;
+ }
+ }
+ }
+ }
+list_full:
+
+ iounmap(mapped_vaddr);
+
+ /* copy the reply and the valid part of our pfn list to the user */
+ rep.pfn_free = node_free_pages; /* the total, for statistics */
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+/*
+ * Get the memap_data table from makedumpfile
+ * and do the single allocate of the pfn_list.
+ */
+int
+write_vmcore_get_memmap(struct pfn_list_request *reqp)
+{
+ int i;
+ int count;
+ int size;
+ int ret = 0;
+ long pfn_list_elements;
+ long malloc_size;
+ unsigned long page_section_start;
+ unsigned long page_section_size;
+ struct mem_map_data *mmd, *dum_mmd;
+ struct pfn_reply rep;
+ void *bufptr;
+
+ rep.pfn_list_elements = 0;
+ if (num_mem_map_data) {
+ /* shouldn't have been done before, but if it was.. */
+ printk(KERN_INFO "warning: PL_REQUEST_MEMMAP is repeated\n");
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data;
+ i++, mmd++) {
+ iounmap(mmd->section_vaddr);
+ }
+ kfree(mem_map_data);
+ mem_map_data = NULL;
+ num_mem_map_data = 0;
+ kfree(pfn_list);
+ pfn_list = NULL;
+ }
+
+ count = reqp->map_count;
+ size = reqp->map_size;
+ bufptr = reqp->map_ptr;
+ if (size != (count * sizeof(struct mem_map_data))) {
+ printk("Error in mem_map_data, %d * %ld != %d\n",
+ count, sizeof(struct mem_map_data), size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* add a dummy at the end to limit the size of the last entry */
+ size += sizeof(struct mem_map_data);
+
+ mem_map_data = kzalloc(size, GFP_KERNEL);
+ if (!mem_map_data) {
+ printk("kmalloc of mem_map_data for %d failed\n", size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (copy_from_user(mem_map_data, bufptr, size)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ num_mem_map_data = count;
+
+ /* construct the dummy entry to limit the size of 'next_mmd->mem_map' */
+ /* (see find_local_vaddr() ) */
+ mmd = mem_map_data + (num_mem_map_data - 1);
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ dum_mmd = mmd + 1;
+ *dum_mmd = *mmd;
+ dum_mmd->mem_map += page_section_size;
+
+ /* Fill in the ending address of array of page struct */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ mmd->ending_paddr = mmd->paddr +
+ ((mmd->pfn_end - mmd->pfn_start) * sizeof(struct page));
+ }
+
+ /* Map each section of page structures to local virtual addresses */
+ /* (these are never iounmap'd, as this is the crash kernel) */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ page_section_start = mmd->paddr;
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ mmd->section_vaddr = ioremap_cache(page_section_start,
+ page_section_size);
+ if (!mmd->section_vaddr) {
+ printk(
+ "ioremap_cache of [%d] node %#lx for %#lx failed\n",
+ i, page_section_start, page_section_size);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ /*
+ * allocate the array for PFN's (just once)
+ * get as much as we can, up to what the user specified, and return
+ * that count to the user
+ */
+ pfn_list_elements = reqp->list_size;
+ do {
+ malloc_size = pfn_list_elements * sizeof(struct pfn_element);
+ if ((pfn_list = kmalloc(malloc_size, GFP_KERNEL)) != NULL) {
+ rep.pfn_list_elements = pfn_list_elements;
+ max_pfn_list = pfn_list_elements;
+ goto out;
+ }
+ pfn_list_elements -= 1000;
+ } while (pfn_list == NULL && pfn_list_elements > 0);
+
+ ret = -EINVAL;
+out:
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ return ret;
+}
+
+/*
+ * Return the pfns of to-be-excluded pages fulfilling this request.
+ * This is called for each mem_map in makedumpfile's list.
+ */
+int
+write_vmcore_get_excludes(struct pfn_list_request *reqp)
+{
+ int i;
+ int start = 0;
+ int end;
+ unsigned long paddr;
+ unsigned long pfn;
+ void *vaddr;
+ struct page *pagep;
+ struct pfn_reply rep;
+ struct pfn_element *pe;
+
+ if (!num_mem_map_data) {
+ /* sanity check */
+ printk(
+ "ERROR:PL_REQUEST_MEMMAP not done before PL_REQUEST_EXCLUDE\n");
+ return -EINVAL;
+ }
+
+ /*
+ * the request contains (besides request type and bufptr):
+ * paddr (physical address of the page[0]
+ * count of pages in the block
+ * exclude bits (DL_EXCLUDE_...)
+ */
+ paddr = reqp->paddr;
+ end = reqp->count;
+ pfn = reqp->pfn_start;
+ /* find the already-mapped vaddr of this paddr */
+ vaddr = find_local_from_paddr(paddr);
+ if (!vaddr) {
+ printk("ERROR: PL_REQUEST_EXCLUDE cannot find paddr %#lx\n",
+ paddr);
+ return -EINVAL;
+ }
+ if (reqp->more) {
+ start = reqp->map_index;
+ vaddr += (reqp->map_index * sizeof(struct page));
+ pfn += reqp->map_index;
+ }
+ memset(&rep, 0, sizeof(rep));
+ in_pfn_list = 0;
+
+ for (i = start, pagep = (struct page *)vaddr; i < end;
+ i++, pagep++, pfn++) {
+ if (in_pfn_list == max_pfn_list) {
+ rep.in_pfn_list = in_pfn_list;
+ rep.more = 1;
+ rep.map_index = i;
+ break;
+ }
+ /*
+ * Exclude the free page managed by a buddy
+ */
+ if ((reqp->exclude_bits & DL_EXCLUDE_FREE)
+ && (pagep->flags & (1UL << PG_buddy))) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = pagep->private;
+ rep.pfn_free += (1 << pe->order);
+ }
+ /*
+ * Exclude the cache page without the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isPrivate(pagep->flags) && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache++;
+ }
+ /*
+ * Exclude the cache page with the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE_PRI)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache_private++;
+ }
+ /*
+ * Exclude the data page of the user process.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_USER_DATA)
+ && isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_user++;
+ }
+
+ }
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static ssize_t write_vmcore_pfn_lists(struct file *file,
+ const char __user *user_buf, size_t count, loff_t *ppos)
+{
+ int ret;
+ struct pfn_list_request pfn_list_request;
+
+ if (count != sizeof(struct pfn_list_request)) {
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&pfn_list_request, user_buf, count))
+ return -EFAULT;
+
+ if (pfn_list_request.request == PL_REQUEST_FREE) {
+ ret = write_vmcore_get_free(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_EXCLUDE) {
+ ret = write_vmcore_get_excludes(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_MEMMAP) {
+ ret = write_vmcore_get_memmap(&pfn_list_request);
+ } else {
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+ return count;
+}
+
static const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
};
+static const struct file_operations proc_vmcore_pfn_lists_operations = {
+ .write = write_vmcore_pfn_lists,
+};
+
static struct vmcore* __init get_new_element(void)
{
return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
@@ -648,6 +1212,10 @@ static int __init vmcore_init(void)
proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
if (proc_vmcore)
proc_vmcore->size = vmcore_size;
+
+ proc_vmcore_pfn_lists = proc_create("vmcore_pfn_lists", S_IWUSR, NULL,
+ &proc_vmcore_pfn_lists_operations);
+
return 0;
}
module_init(vmcore_init)
Index: linux/include/linux/makedumpfile.h
===================================================================
--- /dev/null
+++ linux/include/linux/makedumpfile.h
@@ -0,0 +1,115 @@
+/*
+ * makedumpfile.h
+ * portions Copyright (C) 2006, 2007, 2008, 2009 NEC Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define isLRU(flags) (flags & (1UL << PG_lru))
+#define isPrivate(flags) (flags & (1UL << PG_private))
+#define isSwapCache(flags) (flags & (1UL << PG_swapcache))
+
+static inline int
+isAnon(struct address_space *mapping)
+{
+ return ((unsigned long)mapping & PAGE_MAPPING_ANON) != 0;
+}
+
+#define DL_EXCLUDE_ZERO (0x001) /* Exclude Pages filled with Zeros */
+#define DL_EXCLUDE_CACHE (0x002) /* Exclude Cache Pages
+ without Private Pages */
+#define DL_EXCLUDE_CACHE_PRI (0x004) /* Exclude Cache Pages
+ with Private Pages */
+#define DL_EXCLUDE_USER_DATA (0x008) /* Exclude UserProcessData Pages */
+#define DL_EXCLUDE_FREE (0x010) /* Exclude Free Pages */
+
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negotiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
+ unsigned long long pfn_start;
+ unsigned long long pfn_end;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
+};
[-- Attachment #4: 121207.vmcore_pagescans.sles --]
[-- Type: text/plain, Size: 21973 bytes --]
To: kumagai-atsushi@mxc.nes.nec.co.jp d.hatayama@jp.fujitsu.com
Cc: kexec@lists.infradead.org
Subject: [PATCH] scan page tables for makedumpfile, 3.0.13 kernel
From: Cliff Wickman <cpw@sgi.com>
This patch provides the kernel support for makedumpfile to request
a list of PFNs.
Accompanies
[PATCH v2] makedumpfile: request the kernel do page scans
---
fs/proc/vmcore.c | 571 +++++++++++++++++++++++++++++++++++++++++++
include/linux/makedumpfile.h | 115 ++++++++
2 files changed, 686 insertions(+)
Index: linux/fs/proc/vmcore.c
===================================================================
--- linux.orig/fs/proc/vmcore.c
+++ linux/fs/proc/vmcore.c
@@ -18,8 +18,18 @@
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/list.h>
+#include <linux/makedumpfile.h>
+#include <linux/mmzone.h>
#include <asm/uaccess.h>
#include <asm/io.h>
+#include <asm/page.h>
+static int num_mem_map_data = 0;
+static struct mem_map_data *mem_map_data;
+static struct pfn_element *pfn_list;
+static long in_pfn_list;
+static int last_found_vaddr = 0;
+static int last_found_paddr = 0;
+static int max_pfn_list;
/* List representing chunks of contiguous memory areas and their offsets in
* vmcore file.
@@ -34,6 +44,7 @@ static size_t elfcorebuf_sz;
static u64 vmcore_size;
static struct proc_dir_entry *proc_vmcore = NULL;
+static struct proc_dir_entry *proc_vmcore_pfn_lists = NULL;
/*
* Returns > 0 for RAM pages, 0 for non-RAM pages, < 0 on error
@@ -207,11 +218,567 @@ static ssize_t read_vmcore(struct file *
return acc;
}
+/*
+ * Given the boot-kernel-relative virtual address of a page
+ * return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+unsigned long
+find_local_vaddr(unsigned long orig_vaddr)
+{
+ int i;
+ int fnd = 0;
+ struct mem_map_data *mmd, *next_mmd;
+ unsigned long paddr;
+ unsigned long local_vaddr;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_vaddr, mmd = mem_map_data + last_found_vaddr,
+ next_mmd = mem_map_data + last_found_vaddr + 1;
+ i < num_mem_map_data; i++, mmd++, next_mmd++) {
+ if (mmd->mem_map && mmd->paddr) {
+ if (orig_vaddr >= mmd->mem_map &&
+ orig_vaddr < next_mmd->mem_map) {
+ offset = orig_vaddr - mmd->mem_map;
+ paddr = mmd->paddr + offset;
+ fnd++;
+ /* caching gives about 99% hit on first pass */
+ last_found_vaddr = i;
+ break;
+ }
+ }
+ }
+
+ if (! fnd) {
+ if (last_found_vaddr > 0) {
+ last_found_vaddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+ }
+
+ /* paddr is now the physical address of the page structure */
+ /* and offset is the offset into the found section, and we have
+ a table of how those sections are ioremap_cache'd */
+ local_vaddr = (unsigned long)mmd->section_vaddr + offset;
+ return local_vaddr;
+}
+
+/*
+ * Given a paddr, return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+void *
+find_local_from_paddr(unsigned long paddr)
+{
+ int i;
+ struct mem_map_data *mmd;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_paddr, mmd = mem_map_data + last_found_paddr;
+ i < num_mem_map_data; i++, mmd++) {
+ if ((paddr >= mmd->paddr) && (paddr < mmd->ending_paddr)) {
+ offset = paddr - mmd->paddr;
+ last_found_paddr = i;
+ /* caching gives about 98% hit on first pass */
+ return (void *)(mmd->section_vaddr + offset);
+ }
+ }
+
+ if (last_found_paddr > 0) {
+ last_found_paddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+}
+
+/*
+ * given an anchoring list_head, walk the list of free pages
+ * 'root' is a virtual address based on the ioremap_cache'd pointer pgp
+ * 'boot_root' is the virtual address of the list root, boot kernel relative
+ *
+ * return the number of pages found on the list
+ */
+int
+walk_freelist(struct list_head *root, int node, int zone, int order, int list,
+ int restart_list, int start_page, struct pfn_list_request *reqp,
+ struct pfn_reply *replyp, struct list_head *boot_root)
+{
+ int list_ct = 0;
+ int list_free_pages = 0;
+ int doit;
+ unsigned long start_pfn;
+ struct page *pagep;
+ struct page *local_pagep;
+ struct list_head *lhp;
+ struct list_head *local_lhp; /* crashkernel-relative */
+ struct list_head *prev;
+ struct pfn_element *pe;
+
+ /*
+ * root is the crashkernel-relative address of the anchor of the
+ * free_list.
+ */
+ prev = root;
+ if (root == NULL) {
+ printk(KERN_EMERG "root is null!!, node %d order %d\n",
+ node, order);
+ return 0;
+ }
+
+ if (root->next == boot_root)
+ /* list is empty */
+ return 0;
+
+ lhp = root->next;
+ local_lhp = (struct list_head *)find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp) {
+ return 0;
+ }
+
+ while (local_lhp != boot_root) {
+ list_ct++;
+ if (lhp == NULL) {
+ printk(KERN_EMERG
+ "The free list has a null!!, node %d order %d\n",
+ node, order);
+ break;
+ }
+ if (list_ct > 1 && local_lhp->prev != prev) {
+ /* can't be compared to root, as that is local */
+ printk(KERN_EMERG "The free list is broken!!\n");
+ break;
+ }
+
+ /* we want the boot kernel's pfn that this page represents */
+ pagep = container_of((struct list_head *)lhp,
+ struct page, lru);
+ start_pfn = pagep - vmemmap;
+ local_pagep = container_of((struct list_head *)local_lhp,
+ struct page, lru);
+ doit = 1;
+ if (restart_list && list_ct < start_page)
+ doit = 0;
+ if (doit) {
+ if (in_pfn_list == max_pfn_list) {
+ /* if array would overflow, come back to
+ this page with a continuation */
+ replyp->more = 1;
+ replyp->zone_index = zone;
+ replyp->freearea_index = order;
+ replyp->type_index = list;
+ replyp->list_ct = list_ct;
+ goto list_is_full;
+ }
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = start_pfn;
+ pe->order = order;
+ list_free_pages += (1 << order);
+ }
+ prev = lhp;
+ lhp = local_pagep->lru.next;
+ /* the local node-relative vaddr: */
+ local_lhp = (struct list_head *)
+ find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp)
+ break;
+ }
+
+list_is_full:
+ return list_free_pages;
+}
+
+/*
+ * Return the pfns of free pages on this node
+ */
+int
+write_vmcore_get_free(struct pfn_list_request *reqp)
+{
+ int node;
+ int nr_zones;
+ int nr_orders = MAX_ORDER;
+ int nr_freelist = MIGRATE_TYPES;
+ int zone;
+ int order;
+ int list;
+ int start_zone = 0;
+ int start_order = 0;
+ int start_list = 0;
+ int ret;
+ int restart = 0;
+ int start_page = 0;
+ int node_free_pages = 0;
+ struct pfn_reply rep;
+ struct pglist_data *pgp;
+ struct zone *zonep;
+ struct free_area *fap;
+ struct list_head *flp;
+ struct list_head *boot_root;
+ unsigned long pgdat_paddr;
+ unsigned long pgdat_vaddr;
+ unsigned long page_aligned_pgdat;
+ unsigned long page_aligned_size;
+ void *mapped_vaddr;
+
+ node = reqp->node;
+ pgdat_paddr = reqp->pgdat_paddr;
+ pgdat_vaddr = reqp->pgdat_vaddr;
+
+ /* map this pglist_data structure within a page-aligned area */
+ page_aligned_pgdat = pgdat_paddr & ~(PAGE_SIZE - 1);
+ page_aligned_size = sizeof(struct pglist_data) +
+ (pgdat_paddr - page_aligned_pgdat);
+ page_aligned_size = ((page_aligned_size + (PAGE_SIZE - 1))
+ >> PAGE_SHIFT) << PAGE_SHIFT;
+ mapped_vaddr = ioremap_cache(page_aligned_pgdat, page_aligned_size);
+ if (!mapped_vaddr) {
+ printk("ioremap_cache of pgdat %#lx failed\n",
+ page_aligned_pgdat);
+ return -EINVAL;
+ }
+ pgp = (struct pglist_data *)(mapped_vaddr +
+ (pgdat_paddr - page_aligned_pgdat));
+ nr_zones = pgp->nr_zones;
+ memset(&rep, 0, sizeof(rep));
+
+ if (reqp->more) {
+ restart = 1;
+ start_zone = reqp->zone_index;
+ start_order = reqp->freearea_index;
+ start_list = reqp->type_index;
+ start_page = reqp->list_ct;
+ }
+
+ in_pfn_list = 0;
+ for (zone = start_zone; zone < nr_zones; zone++) {
+ zonep = &pgp->node_zones[zone];
+ for (order = start_order; order < nr_orders; order++) {
+ fap = &zonep->free_area[order];
+ /* some free_area's are all zero */
+ if (fap->nr_free) {
+ for (list = start_list; list < nr_freelist;
+ list++) {
+ flp = &fap->free_list[list];
+ boot_root = (struct list_head *)
+ (pgdat_vaddr +
+ ((unsigned long)flp -
+ (unsigned long)pgp));
+ ret = walk_freelist(flp, node, zone,
+ order, list, restart,
+ start_page, reqp, &rep,
+ boot_root);
+ node_free_pages += ret;
+ restart = 0;
+ if (rep.more)
+ goto list_full;
+ }
+ }
+ }
+ }
+list_full:
+
+ iounmap(mapped_vaddr);
+
+ /* copy the reply and the valid part of our pfn list to the user */
+ rep.pfn_free = node_free_pages; /* the total, for statistics */
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+/*
+ * Get the memap_data table from makedumpfile
+ * and do the single allocate of the pfn_list.
+ */
+int
+write_vmcore_get_memmap(struct pfn_list_request *reqp)
+{
+ int i;
+ int count;
+ int size;
+ int ret = 0;
+ long pfn_list_elements;
+ long malloc_size;
+ unsigned long page_section_start;
+ unsigned long page_section_size;
+ struct mem_map_data *mmd, *dum_mmd;
+ struct pfn_reply rep;
+ void *bufptr;
+
+ rep.pfn_list_elements = 0;
+ if (num_mem_map_data) {
+ /* shouldn't have been done before, but if it was.. */
+ printk(KERN_INFO "warning: PL_REQUEST_MEMMAP is repeated\n");
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data;
+ i++, mmd++) {
+ iounmap(mmd->section_vaddr);
+ }
+ kfree(mem_map_data);
+ mem_map_data = NULL;
+ num_mem_map_data = 0;
+ kfree(pfn_list);
+ pfn_list = NULL;
+ }
+
+ count = reqp->map_count;
+ size = reqp->map_size;
+ bufptr = reqp->map_ptr;
+ if (size != (count * sizeof(struct mem_map_data))) {
+ printk("Error in mem_map_data, %d * %ld != %d\n",
+ count, sizeof(struct mem_map_data), size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* add a dummy at the end to limit the size of the last entry */
+ size += sizeof(struct mem_map_data);
+
+ mem_map_data = kzalloc(size, GFP_KERNEL);
+ if (!mem_map_data) {
+ printk("kmalloc of mem_map_data for %d failed\n", size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (copy_from_user(mem_map_data, bufptr, size)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ num_mem_map_data = count;
+
+ /* construct the dummy entry to limit the size of 'next_mmd->mem_map' */
+ /* (see find_local_vaddr() ) */
+ mmd = mem_map_data + (num_mem_map_data - 1);
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ dum_mmd = mmd + 1;
+ *dum_mmd = *mmd;
+ dum_mmd->mem_map += page_section_size;
+
+ /* Fill in the ending address of array of page struct */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ mmd->ending_paddr = mmd->paddr +
+ ((mmd->pfn_end - mmd->pfn_start) * sizeof(struct page));
+ }
+
+ /* Map each section of page structures to local virtual addresses */
+ /* (these are never iounmap'd, as this is the crash kernel) */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ page_section_start = mmd->paddr;
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ mmd->section_vaddr = ioremap_cache(page_section_start,
+ page_section_size);
+ if (!mmd->section_vaddr) {
+ printk(
+ "ioremap_cache of [%d] node %#lx for %#lx failed\n",
+ i, page_section_start, page_section_size);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ /*
+ * allocate the array for PFN's (just once)
+ * get as much as we can, up to what the user specified, and return
+ * that count to the user
+ */
+ pfn_list_elements = reqp->list_size;
+ do {
+ malloc_size = pfn_list_elements * sizeof(struct pfn_element);
+ if ((pfn_list = kmalloc(malloc_size, GFP_KERNEL)) != NULL) {
+ rep.pfn_list_elements = pfn_list_elements;
+ max_pfn_list = pfn_list_elements;
+ goto out;
+ }
+ pfn_list_elements -= 1000;
+ } while (pfn_list == NULL && pfn_list_elements > 0);
+
+ ret = -EINVAL;
+out:
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ return ret;
+}
+
+/*
+ * Return the pfns of to-be-excluded pages fulfilling this request.
+ * This is called for each mem_map in makedumpfile's list.
+ */
+int
+write_vmcore_get_excludes(struct pfn_list_request *reqp)
+{
+ int i;
+ int start = 0;
+ int end;
+ unsigned long paddr;
+ unsigned long pfn;
+ void *vaddr;
+ struct page *pagep;
+ struct pfn_reply rep;
+ struct pfn_element *pe;
+
+ if (!num_mem_map_data) {
+ /* sanity check */
+ printk(
+ "ERROR:PL_REQUEST_MEMMAP not done before PL_REQUEST_EXCLUDE\n");
+ return -EINVAL;
+ }
+
+ /*
+ * the request contains (besides request type and bufptr):
+ * paddr (physical address of the page[0]
+ * count of pages in the block
+ * exclude bits (DL_EXCLUDE_...)
+ */
+ paddr = reqp->paddr;
+ end = reqp->count;
+ pfn = reqp->pfn_start;
+ /* find the already-mapped vaddr of this paddr */
+ vaddr = find_local_from_paddr(paddr);
+ if (!vaddr) {
+ printk("ERROR: PL_REQUEST_EXCLUDE cannot find paddr %#lx\n",
+ paddr);
+ return -EINVAL;
+ }
+ if (reqp->more) {
+ start = reqp->map_index;
+ vaddr += (reqp->map_index * sizeof(struct page));
+ pfn += reqp->map_index;
+ }
+ memset(&rep, 0, sizeof(rep));
+ in_pfn_list = 0;
+
+ for (i = start, pagep = (struct page *)vaddr; i < end;
+ i++, pagep++, pfn++) {
+ if (in_pfn_list == max_pfn_list) {
+ rep.in_pfn_list = in_pfn_list;
+ rep.more = 1;
+ rep.map_index = i;
+ break;
+ }
+ /*
+ * Exclude the free page managed by a buddy
+ */
+ if ((reqp->exclude_bits & DL_EXCLUDE_FREE)
+ && ((pagep->flags & (1UL << PG_slab)) == 0)
+ && (atomic_read(&pagep->_mapcount) ==
+ PAGE_BUDDY_MAPCOUNT_VALUE)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = pagep->private;
+ rep.pfn_free += (1 << pe->order);
+ }
+ /*
+ * Exclude the cache page without the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isPrivate(pagep->flags) && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache++;
+ }
+ /*
+ * Exclude the cache page with the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE_PRI)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache_private++;
+ }
+ /*
+ * Exclude the data page of the user process.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_USER_DATA)
+ && isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_user++;
+ }
+
+ }
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static ssize_t write_vmcore_pfn_lists(struct file *file,
+ const char __user *user_buf, size_t count, loff_t *ppos)
+{
+ int ret;
+ struct pfn_list_request pfn_list_request;
+
+ if (count != sizeof(struct pfn_list_request)) {
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&pfn_list_request, user_buf, count))
+ return -EFAULT;
+
+ if (pfn_list_request.request == PL_REQUEST_FREE) {
+ ret = write_vmcore_get_free(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_EXCLUDE) {
+ ret = write_vmcore_get_excludes(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_MEMMAP) {
+ ret = write_vmcore_get_memmap(&pfn_list_request);
+ } else {
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+ return count;
+}
+
+
static const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
.llseek = default_llseek,
};
+static const struct file_operations proc_vmcore_pfn_lists_operations = {
+ .write = write_vmcore_pfn_lists,
+};
+
static struct vmcore* __init get_new_element(void)
{
return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
@@ -696,6 +1263,10 @@ static int __init vmcore_init(void)
proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
if (proc_vmcore)
proc_vmcore->size = vmcore_size;
+
+ proc_vmcore_pfn_lists = proc_create("vmcore_pfn_lists", S_IWUSR, NULL,
+ &proc_vmcore_pfn_lists_operations);
+
return 0;
}
module_init(vmcore_init)
Index: linux/include/linux/makedumpfile.h
===================================================================
--- /dev/null
+++ linux/include/linux/makedumpfile.h
@@ -0,0 +1,115 @@
+/*
+ * makedumpfile.h
+ * portions Copyright (C) 2006, 2007, 2008, 2009 NEC Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define isLRU(flags) (flags & (1UL << PG_lru))
+#define isPrivate(flags) (flags & (1UL << PG_private))
+#define isSwapCache(flags) (flags & (1UL << PG_swapcache))
+
+static inline int
+isAnon(struct address_space *mapping)
+{
+ return ((unsigned long)mapping & PAGE_MAPPING_ANON) != 0;
+}
+
+#define DL_EXCLUDE_ZERO (0x001) /* Exclude Pages filled with Zeros */
+#define DL_EXCLUDE_CACHE (0x002) /* Exclude Cache Pages
+ without Private Pages */
+#define DL_EXCLUDE_CACHE_PRI (0x004) /* Exclude Cache Pages
+ with Private Pages */
+#define DL_EXCLUDE_USER_DATA (0x008) /* Exclude UserProcessData Pages */
+#define DL_EXCLUDE_FREE (0x010) /* Exclude Free Pages */
+
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negotiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
+ unsigned long long pfn_start;
+ unsigned long long pfn_end;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
+};
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] makedumpfile: request the kernel do page scans
2012-12-10 0:59 ` [PATCH] makedumpfile: request the kernel do page scans HATAYAMA Daisuke
2012-12-10 15:36 ` Cliff Wickman
@ 2012-12-10 15:43 ` Cliff Wickman
2012-12-10 15:50 ` Cliff Wickman
2 siblings, 0 replies; 7+ messages in thread
From: Cliff Wickman @ 2012-12-10 15:43 UTC (permalink / raw)
To: HATAYAMA Daisuke
Cc: vgoyal, kexec, ptesarik, linux-kernel, kumagai-atsushi,
""@jp.fujitsu.com
[-- Attachment #1: Type: text/plain, Size: 130368 bytes --]
On Mon, Dec 10, 2012 at 09:59:29AM +0900, HATAYAMA Daisuke wrote:
> From: Cliff Wickman <cpw@sgi.com>
> Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
> Date: Mon, 19 Nov 2012 12:07:10 -0600
>
> > On Fri, Nov 16, 2012 at 03:39:44PM -0500, Vivek Goyal wrote:
> >> On Thu, Nov 15, 2012 at 04:52:40PM -0600, Cliff Wickman wrote:
> >> >
> >> > Gentlemen,
> >> >
> >> > I know this is rather late to the game, given all the recent work to speed
> >> > up makedumpfile and reduce the memory that it consumes.
> >> > But I've been experimenting with asking the kernel to scan the page tables
> >> > instead of reading all those page structures through /proc/vmcore.
> >> >
> >> > The results are rather dramatic -- if they weren't I would not presume to
> >> > suggest such a radical path.
> >> > On a small, idle UV system: about 4 sec. versus about 40 sec.
> >> > On a 8TB UV the unnecessary page scan alone takes 4 minutes, vs. about 200 min
> >> > through /proc/vmcore.
> >> >
> >> > I have not compared it to your version 1.5.1, so I don't know if your recent
> >> > work provides similar speedups.
> >>
> >> I guess try 1.5.1-rc. IIUC, we had the logic of going through page tables
> >> but that required one single bitmap to be present and in constrained
> >> memory environment we will not have that.
> >>
> >> That's when this idea came up that scan portion of struct page range,
> >> filter it, dump it and then move on to next range.
> >>
> >> Even after 1.5.1-rc if difference is this dramatic, that means we are
> >> not doing something right in makedumpfile and it needs to be
> >> fixed/optimized.
> >>
> >> But moving the logic to kernel does not make much sense to me at this
> >> point of time untile and unless there is a good explanation that why
> >> user space can't do a good job of what kernel is doing.
> >
> > I tested a patch in which makedumpfile does nothing but scan all the
> > page structures using /proc/vmcore. It is simply reading each consecutive
> > range of page structures in readmem() chunks of 512 structures. And doing
> > nothing more than accumulating a hash total of the 'flags' field in each
> > page (for a sanity check). On my test machine there are 6 blocks of page
> > structures, totaling 12 million structures. This takes 31.1 'units of time'
> > (I won't say seconds, as the speed of the clock seems to be way too fast in
> > the crash kernel). If I increase the buffer size to 5120 structures: 31.0 units.
> > At 51200 structures: 30.9. So buffer size has virtually no effect.
> >
> > I also request the kernel to do the same thing. Each of the 6 requests
> > asks the kernel to scan a range of page structures and accumulate a hash
> > total of the 'flags' field. (And also copy a 10000-element pfn list back
> > to user space, to test that such copies don't add significant overhead.)
> > And the 12 million pages are scanned in 1.6 'units of time'.
> >
> > If I compare the time for actual page scanning (unnecessary pages and
> > free pages) through /proc/vmcore vs. requesting the kernel to do the
> > scanning: 40 units vs. 3.8 units.
> >
> > My conclusion is that makedumpfile's page scanning procedure is extremely
> > dominated by the overhead of copying page structures through /proc/vmcore.
> > And that is about 20x slower than using the kernel to access pages.
>
> I have not tested your patch set on the machine with 2TB due to
> reservation problem, but I already tested it on my local machine with
> 32GB and saw big performance improvement.
>
> I applied your patch set on makedumpfile v1.5.1-rc and added an option
> -N not to dump pages to focus on scanning pages part only.
>
> By this, while scanning pages in user-space took about 25 seconds,
> scanning pages in kernel-space took about 1 second.
>
> During the execution I profiled it using perf record/report and its
> results are attached files.
>
> >From this we can notice that current makedumpfile consumes large part
> of execution time for ioremap and its related processing. copy_to_user
> was less than 2% only relative to a whole processing.
>
> Looking into the codes around read method of /proc/vmcore, its call
> stack can be broken into as follows:
>
> read_vmcore
> read_from_oldmem
> copy_oldmem_page
>
> copy_oldmem_page reads the 1st kernel's memory *per page* using
> ioremap_cache and after completing it, immediately unmaps the remapped
> address using iounmap.
>
> Because ioremap/iounmap is called *per page*, this number of calling
> ioremap throught scanning a whole pages is unchanged even if
> makedumpfile's cache size is changed. This seems consistent with
> Cliff's explanation that increasing 512 entries of makedumpfile's
> cache was meaningless.
>
> I think the first step to address this issue is to introduce a kind of
> cache in read_vmcore path to reduce the number of calling
> ioremap/iounmap. Porting scanning logic into kernel-space should be
> considered if it turns out not to work enough.
>
> Thanks.
> HATAYAMA, Daisuke
(resending this note - I seem to have messed up the email header)
Hi Hatayama,
If ioremap/iounmap is the bottleneck then perhaps you could do what
my patch does: it consolidates all the ranges of physical addresses
where the boot kernel's page structures reside (see make_kernel_mmap())
and passes them to the kernel, which then does a handfull of ioremaps's
to
cover all of them. Then /proc/vmcore could look up the already-mapped
virtual address.
(also note a kludge in get_mm_sparsemem() that verifies that each
section
of the mem_map spans contiguous ranges of page structures. I had
trouble with some sections when I made that assumption)
I'm attaching 3 patches that might be useful in your testing:
- 121210.proc_vmcore2 my current patch that applies to the released
makedumpfile 1.5.1
- 121207.vmcore_pagescans.sles applies to a 3.0.13 kernel
- 121207.vmcore_pagescans.rhel applies to a 2.6.32 kernel
-Cliff
> sadump: does not have partition header
> sadump: read dump device as unknown format
> sadump: unknown format
> LOAD (0)
> phys_start : 1000000
> phys_end : 22f1000
> virt_start : ffffffff81000000
> virt_end : ffffffff822f1000
> LOAD (1)
> phys_start : 10000
> phys_end : 9b000
> virt_start : ffff880000010000
> virt_end : ffff88000009b000
> LOAD (2)
> phys_start : 100000
> phys_end : 27000000
> virt_start : ffff880000100000
> virt_end : ffff880027000000
> LOAD (3)
> phys_start : 37000000
> phys_end : 7b00d000
> virt_start : ffff880037000000
> virt_end : ffff88007b00d000
> LOAD (4)
> phys_start : 100000000
> phys_end : 880000000
> virt_start : ffff880100000000
> virt_end : ffff880880000000
> Linux kdump
> page_size : 4096
> page_size : 4096
>
> max_mapnr : 880000
>
> Buffer size for the cyclic mode: 2228224
>
> num of NODEs : 4
>
>
> Memory type : SPARSEMEM_EX
>
> mem_map (0)
> mem_map : ffffea0000000000
> pfn_start : 0
> pfn_end : 8000
> mem_map (1)
> mem_map : ffffea00001c0000
> pfn_start : 8000
> pfn_end : 10000
> mem_map (2)
> mem_map : ffffea0000380000
> pfn_start : 10000
> pfn_end : 18000
> mem_map (3)
> mem_map : ffffea0000540000
> pfn_start : 18000
> pfn_end : 20000
> mem_map (4)
> mem_map : ffffea0000700000
> pfn_start : 20000
> pfn_end : 28000
> mem_map (5)
> mem_map : ffffea00008c0000
> pfn_start : 28000
> pfn_end : 30000
> mem_map (6)
> mem_map : ffffea0000a80000
> pfn_start : 30000
> pfn_end : 38000
> mem_map (7)
> mem_map : ffffea0000c40000
> pfn_start : 38000
> pfn_end : 40000
> mem_map (8)
> mem_map : ffffea0000e00000
> pfn_start : 40000
> pfn_end : 48000
> mem_map (9)
> mem_map : ffffea0000fc0000
> pfn_start : 48000
> pfn_end : 50000
> mem_map (10)
> mem_map : ffffea0001180000
> pfn_start : 50000
> pfn_end : 58000
> mem_map (11)
> mem_map : ffffea0001340000
> pfn_start : 58000
> pfn_end : 60000
> mem_map (12)
> mem_map : ffffea0001500000
> pfn_start : 60000
> pfn_end : 68000
> mem_map (13)
> mem_map : ffffea00016c0000
> pfn_start : 68000
> pfn_end : 70000
> mem_map (14)
> mem_map : ffffea0001880000
> pfn_start : 70000
> pfn_end : 78000
> mem_map (15)
> mem_map : ffffea0001a40000
> pfn_start : 78000
> pfn_end : 80000
> mem_map (16)
> mem_map : 0
> pfn_start : 80000
> pfn_end : 88000
> mem_map (17)
> mem_map : 0
> pfn_start : 88000
> pfn_end : 90000
> mem_map (18)
> mem_map : 0
> pfn_start : 90000
> pfn_end : 98000
> mem_map (19)
> mem_map : 0
> pfn_start : 98000
> pfn_end : a0000
> mem_map (20)
> mem_map : 0
> pfn_start : a0000
> pfn_end : a8000
> mem_map (21)
> mem_map : 0
> pfn_start : a8000
> pfn_end : b0000
> mem_map (22)
> mem_map : 0
> pfn_start : b0000
> pfn_end : b8000
> mem_map (23)
> mem_map : 0
> pfn_start : b8000
> pfn_end : c0000
> mem_map (24)
> mem_map : 0
> pfn_start : c0000
> pfn_end : c8000
> mem_map (25)
> mem_map : 0
> pfn_start : c8000
> pfn_end : d0000
> mem_map (26)
> mem_map : 0
> pfn_start : d0000
> pfn_end : d8000
> mem_map (27)
> mem_map : 0
> pfn_start : d8000
> pfn_end : e0000
> mem_map (28)
> mem_map : 0
> pfn_start : e0000
> pfn_end : e8000
> mem_map (29)
> mem_map : 0
> pfn_start : e8000
> pfn_end : f0000
> mem_map (30)
> mem_map : 0
> pfn_start : f0000
> pfn_end : f8000
> mem_map (31)
> mem_map : 0
> pfn_start : f8000
> pfn_end : 100000
> mem_map (32)
> mem_map : ffffea0003800000
> pfn_start : 100000
> pfn_end : 108000
> mem_map (33)
> mem_map : ffffea00039c0000
> pfn_start : 108000
> pfn_end : 110000
> mem_map (34)
> mem_map : ffffea0003b80000
> pfn_start : 110000
> pfn_end : 118000
> mem_map (35)
> mem_map : ffffea0003d40000
> pfn_start : 118000
> pfn_end : 120000
> mem_map (36)
> mem_map : ffffea0003f00000
> pfn_start : 120000
> pfn_end : 128000
> mem_map (37)
> mem_map : ffffea00040c0000
> pfn_start : 128000
> pfn_end : 130000
> mem_map (38)
> mem_map : ffffea0004280000
> pfn_start : 130000
> pfn_end : 138000
> mem_map (39)
> mem_map : ffffea0004440000
> pfn_start : 138000
> pfn_end : 140000
> mem_map (40)
> mem_map : ffffea0004600000
> pfn_start : 140000
> pfn_end : 148000
> mem_map (41)
> mem_map : ffffea00047c0000
> pfn_start : 148000
> pfn_end : 150000
> mem_map (42)
> mem_map : ffffea0004980000
> pfn_start : 150000
> pfn_end : 158000
> mem_map (43)
> mem_map : ffffea0004b40000
> pfn_start : 158000
> pfn_end : 160000
> mem_map (44)
> mem_map : ffffea0004d00000
> pfn_start : 160000
> pfn_end : 168000
> mem_map (45)
> mem_map : ffffea0004ec0000
> pfn_start : 168000
> pfn_end : 170000
> mem_map (46)
> mem_map : ffffea0005080000
> pfn_start : 170000
> pfn_end : 178000
> mem_map (47)
> mem_map : ffffea0005240000
> pfn_start : 178000
> pfn_end : 180000
> mem_map (48)
> mem_map : ffffea0005400000
> pfn_start : 180000
> pfn_end : 188000
> mem_map (49)
> mem_map : ffffea00055c0000
> pfn_start : 188000
> pfn_end : 190000
> mem_map (50)
> mem_map : ffffea0005780000
> pfn_start : 190000
> pfn_end : 198000
> mem_map (51)
> mem_map : ffffea0005940000
> pfn_start : 198000
> pfn_end : 1a0000
> mem_map (52)
> mem_map : ffffea0005b00000
> pfn_start : 1a0000
> pfn_end : 1a8000
> mem_map (53)
> mem_map : ffffea0005cc0000
> pfn_start : 1a8000
> pfn_end : 1b0000
> mem_map (54)
> mem_map : ffffea0005e80000
> pfn_start : 1b0000
> pfn_end : 1b8000
> mem_map (55)
> mem_map : ffffea0006040000
> pfn_start : 1b8000
> pfn_end : 1c0000
> mem_map (56)
> mem_map : ffffea0006200000
> pfn_start : 1c0000
> pfn_end : 1c8000
> mem_map (57)
> mem_map : ffffea00063c0000
> pfn_start : 1c8000
> pfn_end : 1d0000
> mem_map (58)
> mem_map : ffffea0006580000
> pfn_start : 1d0000
> pfn_end : 1d8000
> mem_map (59)
> mem_map : ffffea0006740000
> pfn_start : 1d8000
> pfn_end : 1e0000
> mem_map (60)
> mem_map : ffffea0006900000
> pfn_start : 1e0000
> pfn_end : 1e8000
> mem_map (61)
> mem_map : ffffea0006ac0000
> pfn_start : 1e8000
> pfn_end : 1f0000
> mem_map (62)
> mem_map : ffffea0006c80000
> pfn_start : 1f0000
> pfn_end : 1f8000
> mem_map (63)
> mem_map : ffffea0006e40000
> pfn_start : 1f8000
> pfn_end : 200000
> mem_map (64)
> mem_map : ffffea0007000000
> pfn_start : 200000
> pfn_end : 208000
> mem_map (65)
> mem_map : ffffea00071c0000
> pfn_start : 208000
> pfn_end : 210000
> mem_map (66)
> mem_map : ffffea0007380000
> pfn_start : 210000
> pfn_end : 218000
> mem_map (67)
> mem_map : ffffea0007540000
> pfn_start : 218000
> pfn_end : 220000
> mem_map (68)
> mem_map : ffffea0007700000
> pfn_start : 220000
> pfn_end : 228000
> mem_map (69)
> mem_map : ffffea00078c0000
> pfn_start : 228000
> pfn_end : 230000
> mem_map (70)
> mem_map : ffffea0007a80000
> pfn_start : 230000
> pfn_end : 238000
> mem_map (71)
> mem_map : ffffea0007c40000
> pfn_start : 238000
> pfn_end : 240000
> mem_map (72)
> mem_map : ffffea0007e00000
> pfn_start : 240000
> pfn_end : 248000
> mem_map (73)
> mem_map : ffffea0007fc0000
> pfn_start : 248000
> pfn_end : 250000
> mem_map (74)
> mem_map : ffffea0008180000
> pfn_start : 250000
> pfn_end : 258000
> mem_map (75)
> mem_map : ffffea0008340000
> pfn_start : 258000
> pfn_end : 260000
> mem_map (76)
> mem_map : ffffea0008500000
> pfn_start : 260000
> pfn_end : 268000
> mem_map (77)
> mem_map : ffffea00086c0000
> pfn_start : 268000
> pfn_end : 270000
> mem_map (78)
> mem_map : ffffea0008880000
> pfn_start : 270000
> pfn_end : 278000
> mem_map (79)
> mem_map : ffffea0008a40000
> pfn_start : 278000
> pfn_end : 280000
> mem_map (80)
> mem_map : ffffea0008c00000
> pfn_start : 280000
> pfn_end : 288000
> mem_map (81)
> mem_map : ffffea0008dc0000
> pfn_start : 288000
> pfn_end : 290000
> mem_map (82)
> mem_map : ffffea0008f80000
> pfn_start : 290000
> pfn_end : 298000
> mem_map (83)
> mem_map : ffffea0009140000
> pfn_start : 298000
> pfn_end : 2a0000
> mem_map (84)
> mem_map : ffffea0009300000
> pfn_start : 2a0000
> pfn_end : 2a8000
> mem_map (85)
> mem_map : ffffea00094c0000
> pfn_start : 2a8000
> pfn_end : 2b0000
> mem_map (86)
> mem_map : ffffea0009680000
> pfn_start : 2b0000
> pfn_end : 2b8000
> mem_map (87)
> mem_map : ffffea0009840000
> pfn_start : 2b8000
> pfn_end : 2c0000
> mem_map (88)
> mem_map : ffffea0009a00000
> pfn_start : 2c0000
> pfn_end : 2c8000
> mem_map (89)
> mem_map : ffffea0009bc0000
> pfn_start : 2c8000
> pfn_end : 2d0000
> mem_map (90)
> mem_map : ffffea0009d80000
> pfn_start : 2d0000
> pfn_end : 2d8000
> mem_map (91)
> mem_map : ffffea0009f40000
> pfn_start : 2d8000
> pfn_end : 2e0000
> mem_map (92)
> mem_map : ffffea000a100000
> pfn_start : 2e0000
> pfn_end : 2e8000
> mem_map (93)
> mem_map : ffffea000a2c0000
> pfn_start : 2e8000
> pfn_end : 2f0000
> mem_map (94)
> mem_map : ffffea000a480000
> pfn_start : 2f0000
> pfn_end : 2f8000
> mem_map (95)
> mem_map : ffffea000a640000
> pfn_start : 2f8000
> pfn_end : 300000
> mem_map (96)
> mem_map : ffffea000a800000
> pfn_start : 300000
> pfn_end : 308000
> mem_map (97)
> mem_map : ffffea000a9c0000
> pfn_start : 308000
> pfn_end : 310000
> mem_map (98)
> mem_map : ffffea000ab80000
> pfn_start : 310000
> pfn_end : 318000
> mem_map (99)
> mem_map : ffffea000ad40000
> pfn_start : 318000
> pfn_end : 320000
> mem_map (100)
> mem_map : ffffea000af00000
> pfn_start : 320000
> pfn_end : 328000
> mem_map (101)
> mem_map : ffffea000b0c0000
> pfn_start : 328000
> pfn_end : 330000
> mem_map (102)
> mem_map : ffffea000b280000
> pfn_start : 330000
> pfn_end : 338000
> mem_map (103)
> mem_map : ffffea000b440000
> pfn_start : 338000
> pfn_end : 340000
> mem_map (104)
> mem_map : ffffea000b600000
> pfn_start : 340000
> pfn_end : 348000
> mem_map (105)
> mem_map : ffffea000b7c0000
> pfn_start : 348000
> pfn_end : 350000
> mem_map (106)
> mem_map : ffffea000b980000
> pfn_start : 350000
> pfn_end : 358000
> mem_map (107)
> mem_map : ffffea000bb40000
> pfn_start : 358000
> pfn_end : 360000
> mem_map (108)
> mem_map : ffffea000bd00000
> pfn_start : 360000
> pfn_end : 368000
> mem_map (109)
> mem_map : ffffea000bec0000
> pfn_start : 368000
> pfn_end : 370000
> mem_map (110)
> mem_map : ffffea000c080000
> pfn_start : 370000
> pfn_end : 378000
> mem_map (111)
> mem_map : ffffea000c240000
> pfn_start : 378000
> pfn_end : 380000
> mem_map (112)
> mem_map : ffffea000c400000
> pfn_start : 380000
> pfn_end : 388000
> mem_map (113)
> mem_map : ffffea000c5c0000
> pfn_start : 388000
> pfn_end : 390000
> mem_map (114)
> mem_map : ffffea000c780000
> pfn_start : 390000
> pfn_end : 398000
> mem_map (115)
> mem_map : ffffea000c940000
> pfn_start : 398000
> pfn_end : 3a0000
> mem_map (116)
> mem_map : ffffea000cb00000
> pfn_start : 3a0000
> pfn_end : 3a8000
> mem_map (117)
> mem_map : ffffea000ccc0000
> pfn_start : 3a8000
> pfn_end : 3b0000
> mem_map (118)
> mem_map : ffffea000ce80000
> pfn_start : 3b0000
> pfn_end : 3b8000
> mem_map (119)
> mem_map : ffffea000d040000
> pfn_start : 3b8000
> pfn_end : 3c0000
> mem_map (120)
> mem_map : ffffea000d200000
> pfn_start : 3c0000
> pfn_end : 3c8000
> mem_map (121)
> mem_map : ffffea000d3c0000
> pfn_start : 3c8000
> pfn_end : 3d0000
> mem_map (122)
> mem_map : ffffea000d580000
> pfn_start : 3d0000
> pfn_end : 3d8000
> mem_map (123)
> mem_map : ffffea000d740000
> pfn_start : 3d8000
> pfn_end : 3e0000
> mem_map (124)
> mem_map : ffffea000d900000
> pfn_start : 3e0000
> pfn_end : 3e8000
> mem_map (125)
> mem_map : ffffea000dac0000
> pfn_start : 3e8000
> pfn_end : 3f0000
> mem_map (126)
> mem_map : ffffea000dc80000
> pfn_start : 3f0000
> pfn_end : 3f8000
> mem_map (127)
> mem_map : ffffea000de40000
> pfn_start : 3f8000
> pfn_end : 400000
> mem_map (128)
> mem_map : ffffea000e000000
> pfn_start : 400000
> pfn_end : 408000
> mem_map (129)
> mem_map : ffffea000e1c0000
> pfn_start : 408000
> pfn_end : 410000
> mem_map (130)
> mem_map : ffffea000e380000
> pfn_start : 410000
> pfn_end : 418000
> mem_map (131)
> mem_map : ffffea000e540000
> pfn_start : 418000
> pfn_end : 420000
> mem_map (132)
> mem_map : ffffea000e700000
> pfn_start : 420000
> pfn_end : 428000
> mem_map (133)
> mem_map : ffffea000e8c0000
> pfn_start : 428000
> pfn_end : 430000
> mem_map (134)
> mem_map : ffffea000ea80000
> pfn_start : 430000
> pfn_end : 438000
> mem_map (135)
> mem_map : ffffea000ec40000
> pfn_start : 438000
> pfn_end : 440000
> mem_map (136)
> mem_map : ffffea000ee00000
> pfn_start : 440000
> pfn_end : 448000
> mem_map (137)
> mem_map : ffffea000efc0000
> pfn_start : 448000
> pfn_end : 450000
> mem_map (138)
> mem_map : ffffea000f180000
> pfn_start : 450000
> pfn_end : 458000
> mem_map (139)
> mem_map : ffffea000f340000
> pfn_start : 458000
> pfn_end : 460000
> mem_map (140)
> mem_map : ffffea000f500000
> pfn_start : 460000
> pfn_end : 468000
> mem_map (141)
> mem_map : ffffea000f6c0000
> pfn_start : 468000
> pfn_end : 470000
> mem_map (142)
> mem_map : ffffea000f880000
> pfn_start : 470000
> pfn_end : 478000
> mem_map (143)
> mem_map : ffffea000fa40000
> pfn_start : 478000
> pfn_end : 480000
> mem_map (144)
> mem_map : ffffea000fc00000
> pfn_start : 480000
> pfn_end : 488000
> mem_map (145)
> mem_map : ffffea000fdc0000
> pfn_start : 488000
> pfn_end : 490000
> mem_map (146)
> mem_map : ffffea000ff80000
> pfn_start : 490000
> pfn_end : 498000
> mem_map (147)
> mem_map : ffffea0010140000
> pfn_start : 498000
> pfn_end : 4a0000
> mem_map (148)
> mem_map : ffffea0010300000
> pfn_start : 4a0000
> pfn_end : 4a8000
> mem_map (149)
> mem_map : ffffea00104c0000
> pfn_start : 4a8000
> pfn_end : 4b0000
> mem_map (150)
> mem_map : ffffea0010680000
> pfn_start : 4b0000
> pfn_end : 4b8000
> mem_map (151)
> mem_map : ffffea0010840000
> pfn_start : 4b8000
> pfn_end : 4c0000
> mem_map (152)
> mem_map : ffffea0010a00000
> pfn_start : 4c0000
> pfn_end : 4c8000
> mem_map (153)
> mem_map : ffffea0010bc0000
> pfn_start : 4c8000
> pfn_end : 4d0000
> mem_map (154)
> mem_map : ffffea0010d80000
> pfn_start : 4d0000
> pfn_end : 4d8000
> mem_map (155)
> mem_map : ffffea0010f40000
> pfn_start : 4d8000
> pfn_end : 4e0000
> mem_map (156)
> mem_map : ffffea0011100000
> pfn_start : 4e0000
> pfn_end : 4e8000
> mem_map (157)
> mem_map : ffffea00112c0000
> pfn_start : 4e8000
> pfn_end : 4f0000
> mem_map (158)
> mem_map : ffffea0011480000
> pfn_start : 4f0000
> pfn_end : 4f8000
> mem_map (159)
> mem_map : ffffea0011640000
> pfn_start : 4f8000
> pfn_end : 500000
> mem_map (160)
> mem_map : ffffea0011800000
> pfn_start : 500000
> pfn_end : 508000
> mem_map (161)
> mem_map : ffffea00119c0000
> pfn_start : 508000
> pfn_end : 510000
> mem_map (162)
> mem_map : ffffea0011b80000
> pfn_start : 510000
> pfn_end : 518000
> mem_map (163)
> mem_map : ffffea0011d40000
> pfn_start : 518000
> pfn_end : 520000
> mem_map (164)
> mem_map : ffffea0011f00000
> pfn_start : 520000
> pfn_end : 528000
> mem_map (165)
> mem_map : ffffea00120c0000
> pfn_start : 528000
> pfn_end : 530000
> mem_map (166)
> mem_map : ffffea0012280000
> pfn_start : 530000
> pfn_end : 538000
> mem_map (167)
> mem_map : ffffea0012440000
> pfn_start : 538000
> pfn_end : 540000
> mem_map (168)
> mem_map : ffffea0012600000
> pfn_start : 540000
> pfn_end : 548000
> mem_map (169)
> mem_map : ffffea00127c0000
> pfn_start : 548000
> pfn_end : 550000
> mem_map (170)
> mem_map : ffffea0012980000
> pfn_start : 550000
> pfn_end : 558000
> mem_map (171)
> mem_map : ffffea0012b40000
> pfn_start : 558000
> pfn_end : 560000
> mem_map (172)
> mem_map : ffffea0012d00000
> pfn_start : 560000
> pfn_end : 568000
> mem_map (173)
> mem_map : ffffea0012ec0000
> pfn_start : 568000
> pfn_end : 570000
> mem_map (174)
> mem_map : ffffea0013080000
> pfn_start : 570000
> pfn_end : 578000
> mem_map (175)
> mem_map : ffffea0013240000
> pfn_start : 578000
> pfn_end : 580000
> mem_map (176)
> mem_map : ffffea0013400000
> pfn_start : 580000
> pfn_end : 588000
> mem_map (177)
> mem_map : ffffea00135c0000
> pfn_start : 588000
> pfn_end : 590000
> mem_map (178)
> mem_map : ffffea0013780000
> pfn_start : 590000
> pfn_end : 598000
> mem_map (179)
> mem_map : ffffea0013940000
> pfn_start : 598000
> pfn_end : 5a0000
> mem_map (180)
> mem_map : ffffea0013b00000
> pfn_start : 5a0000
> pfn_end : 5a8000
> mem_map (181)
> mem_map : ffffea0013cc0000
> pfn_start : 5a8000
> pfn_end : 5b0000
> mem_map (182)
> mem_map : ffffea0013e80000
> pfn_start : 5b0000
> pfn_end : 5b8000
> mem_map (183)
> mem_map : ffffea0014040000
> pfn_start : 5b8000
> pfn_end : 5c0000
> mem_map (184)
> mem_map : ffffea0014200000
> pfn_start : 5c0000
> pfn_end : 5c8000
> mem_map (185)
> mem_map : ffffea00143c0000
> pfn_start : 5c8000
> pfn_end : 5d0000
> mem_map (186)
> mem_map : ffffea0014580000
> pfn_start : 5d0000
> pfn_end : 5d8000
> mem_map (187)
> mem_map : ffffea0014740000
> pfn_start : 5d8000
> pfn_end : 5e0000
> mem_map (188)
> mem_map : ffffea0014900000
> pfn_start : 5e0000
> pfn_end : 5e8000
> mem_map (189)
> mem_map : ffffea0014ac0000
> pfn_start : 5e8000
> pfn_end : 5f0000
> mem_map (190)
> mem_map : ffffea0014c80000
> pfn_start : 5f0000
> pfn_end : 5f8000
> mem_map (191)
> mem_map : ffffea0014e40000
> pfn_start : 5f8000
> pfn_end : 600000
> mem_map (192)
> mem_map : ffffea0015000000
> pfn_start : 600000
> pfn_end : 608000
> mem_map (193)
> mem_map : ffffea00151c0000
> pfn_start : 608000
> pfn_end : 610000
> mem_map (194)
> mem_map : ffffea0015380000
> pfn_start : 610000
> pfn_end : 618000
> mem_map (195)
> mem_map : ffffea0015540000
> pfn_start : 618000
> pfn_end : 620000
> mem_map (196)
> mem_map : ffffea0015700000
> pfn_start : 620000
> pfn_end : 628000
> mem_map (197)
> mem_map : ffffea00158c0000
> pfn_start : 628000
> pfn_end : 630000
> mem_map (198)
> mem_map : ffffea0015a80000
> pfn_start : 630000
> pfn_end : 638000
> mem_map (199)
> mem_map : ffffea0015c40000
> pfn_start : 638000
> pfn_end : 640000
> mem_map (200)
> mem_map : ffffea0015e00000
> pfn_start : 640000
> pfn_end : 648000
> mem_map (201)
> mem_map : ffffea0015fc0000
> pfn_start : 648000
> pfn_end : 650000
> mem_map (202)
> mem_map : ffffea0016180000
> pfn_start : 650000
> pfn_end : 658000
> mem_map (203)
> mem_map : ffffea0016340000
> pfn_start : 658000
> pfn_end : 660000
> mem_map (204)
> mem_map : ffffea0016500000
> pfn_start : 660000
> pfn_end : 668000
> mem_map (205)
> mem_map : ffffea00166c0000
> pfn_start : 668000
> pfn_end : 670000
> mem_map (206)
> mem_map : ffffea0016880000
> pfn_start : 670000
> pfn_end : 678000
> mem_map (207)
> mem_map : ffffea0016a40000
> pfn_start : 678000
> pfn_end : 680000
> mem_map (208)
> mem_map : ffffea0016c00000
> pfn_start : 680000
> pfn_end : 688000
> mem_map (209)
> mem_map : ffffea0016dc0000
> pfn_start : 688000
> pfn_end : 690000
> mem_map (210)
> mem_map : ffffea0016f80000
> pfn_start : 690000
> pfn_end : 698000
> mem_map (211)
> mem_map : ffffea0017140000
> pfn_start : 698000
> pfn_end : 6a0000
> mem_map (212)
> mem_map : ffffea0017300000
> pfn_start : 6a0000
> pfn_end : 6a8000
> mem_map (213)
> mem_map : ffffea00174c0000
> pfn_start : 6a8000
> pfn_end : 6b0000
> mem_map (214)
> mem_map : ffffea0017680000
> pfn_start : 6b0000
> pfn_end : 6b8000
> mem_map (215)
> mem_map : ffffea0017840000
> pfn_start : 6b8000
> pfn_end : 6c0000
> mem_map (216)
> mem_map : ffffea0017a00000
> pfn_start : 6c0000
> pfn_end : 6c8000
> mem_map (217)
> mem_map : ffffea0017bc0000
> pfn_start : 6c8000
> pfn_end : 6d0000
> mem_map (218)
> mem_map : ffffea0017d80000
> pfn_start : 6d0000
> pfn_end : 6d8000
> mem_map (219)
> mem_map : ffffea0017f40000
> pfn_start : 6d8000
> pfn_end : 6e0000
> mem_map (220)
> mem_map : ffffea0018100000
> pfn_start : 6e0000
> pfn_end : 6e8000
> mem_map (221)
> mem_map : ffffea00182c0000
> pfn_start : 6e8000
> pfn_end : 6f0000
> mem_map (222)
> mem_map : ffffea0018480000
> pfn_start : 6f0000
> pfn_end : 6f8000
> mem_map (223)
> mem_map : ffffea0018640000
> pfn_start : 6f8000
> pfn_end : 700000
> mem_map (224)
> mem_map : ffffea0018800000
> pfn_start : 700000
> pfn_end : 708000
> mem_map (225)
> mem_map : ffffea00189c0000
> pfn_start : 708000
> pfn_end : 710000
> mem_map (226)
> mem_map : ffffea0018b80000
> pfn_start : 710000
> pfn_end : 718000
> mem_map (227)
> mem_map : ffffea0018d40000
> pfn_start : 718000
> pfn_end : 720000
> mem_map (228)
> mem_map : ffffea0018f00000
> pfn_start : 720000
> pfn_end : 728000
> mem_map (229)
> mem_map : ffffea00190c0000
> pfn_start : 728000
> pfn_end : 730000
> mem_map (230)
> mem_map : ffffea0019280000
> pfn_start : 730000
> pfn_end : 738000
> mem_map (231)
> mem_map : ffffea0019440000
> pfn_start : 738000
> pfn_end : 740000
> mem_map (232)
> mem_map : ffffea0019600000
> pfn_start : 740000
> pfn_end : 748000
> mem_map (233)
> mem_map : ffffea00197c0000
> pfn_start : 748000
> pfn_end : 750000
> mem_map (234)
> mem_map : ffffea0019980000
> pfn_start : 750000
> pfn_end : 758000
> mem_map (235)
> mem_map : ffffea0019b40000
> pfn_start : 758000
> pfn_end : 760000
> mem_map (236)
> mem_map : ffffea0019d00000
> pfn_start : 760000
> pfn_end : 768000
> mem_map (237)
> mem_map : ffffea0019ec0000
> pfn_start : 768000
> pfn_end : 770000
> mem_map (238)
> mem_map : ffffea001a080000
> pfn_start : 770000
> pfn_end : 778000
> mem_map (239)
> mem_map : ffffea001a240000
> pfn_start : 778000
> pfn_end : 780000
> mem_map (240)
> mem_map : ffffea001a400000
> pfn_start : 780000
> pfn_end : 788000
> mem_map (241)
> mem_map : ffffea001a5c0000
> pfn_start : 788000
> pfn_end : 790000
> mem_map (242)
> mem_map : ffffea001a780000
> pfn_start : 790000
> pfn_end : 798000
> mem_map (243)
> mem_map : ffffea001a940000
> pfn_start : 798000
> pfn_end : 7a0000
> mem_map (244)
> mem_map : ffffea001ab00000
> pfn_start : 7a0000
> pfn_end : 7a8000
> mem_map (245)
> mem_map : ffffea001acc0000
> pfn_start : 7a8000
> pfn_end : 7b0000
> mem_map (246)
> mem_map : ffffea001ae80000
> pfn_start : 7b0000
> pfn_end : 7b8000
> mem_map (247)
> mem_map : ffffea001b040000
> pfn_start : 7b8000
> pfn_end : 7c0000
> mem_map (248)
> mem_map : ffffea001b200000
> pfn_start : 7c0000
> pfn_end : 7c8000
> mem_map (249)
> mem_map : ffffea001b3c0000
> pfn_start : 7c8000
> pfn_end : 7d0000
> mem_map (250)
> mem_map : ffffea001b580000
> pfn_start : 7d0000
> pfn_end : 7d8000
> mem_map (251)
> mem_map : ffffea001b740000
> pfn_start : 7d8000
> pfn_end : 7e0000
> mem_map (252)
> mem_map : ffffea001b900000
> pfn_start : 7e0000
> pfn_end : 7e8000
> mem_map (253)
> mem_map : ffffea001bac0000
> pfn_start : 7e8000
> pfn_end : 7f0000
> mem_map (254)
> mem_map : ffffea001bc80000
> pfn_start : 7f0000
> pfn_end : 7f8000
> mem_map (255)
> mem_map : ffffea001be40000
> pfn_start : 7f8000
> pfn_end : 800000
> mem_map (256)
> mem_map : ffffea001c000000
> pfn_start : 800000
> pfn_end : 808000
> mem_map (257)
> mem_map : ffffea001c1c0000
> pfn_start : 808000
> pfn_end : 810000
> mem_map (258)
> mem_map : ffffea001c380000
> pfn_start : 810000
> pfn_end : 818000
> mem_map (259)
> mem_map : ffffea001c540000
> pfn_start : 818000
> pfn_end : 820000
> mem_map (260)
> mem_map : ffffea001c700000
> pfn_start : 820000
> pfn_end : 828000
> mem_map (261)
> mem_map : ffffea001c8c0000
> pfn_start : 828000
> pfn_end : 830000
> mem_map (262)
> mem_map : ffffea001ca80000
> pfn_start : 830000
> pfn_end : 838000
> mem_map (263)
> mem_map : ffffea001cc40000
> pfn_start : 838000
> pfn_end : 840000
> mem_map (264)
> mem_map : ffffea001ce00000
> pfn_start : 840000
> pfn_end : 848000
> mem_map (265)
> mem_map : ffffea001cfc0000
> pfn_start : 848000
> pfn_end : 850000
> mem_map (266)
> mem_map : ffffea001d180000
> pfn_start : 850000
> pfn_end : 858000
> mem_map (267)
> mem_map : ffffea001d340000
> pfn_start : 858000
> pfn_end : 860000
> mem_map\rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [ 3 %] \rExcluding unnecessary pages : [ 17 %] \rExcluding unnecessary pages : [ 26 %] \rExcluding unnecessary pages : [ 34 %] \rExcluding unnecessary pages : [ 42 %] \rExcluding unnecessary pages : [ 50 %] \rExcluding unnecessary pages : [ 59 %] \rExcluding unnecessary pages : [ 67 %] \rExcluding unnecessary pages : [ 75 %] \rExcluding unnecessary pages : [ 84 %] \rExcluding unnecessary pages : [ 92 %] \rExcluding unnecessary pages : [100 %] \rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [ 13 %] \rExcluding unnecessary pages : [ 22 %] \rExcluding unnecessary pages : [ 30 %] \rExcluding unnecessary pages : [ 38 %] \rExcluding unnecessary pages : [ 47 %] \rExcluding unnecessary pages : [ 55 %] \rExcluding unnecessary pages : [ 63 %] \rExcluding unnecessary pages : [ 71 %] \rExcluding unnecessary pages : [ 80 %] \rExcluding unnecessary pages : [ 88 %] \rExcluding unnecessary pages : [ 96 %] \rExcluding unnecessary pages : [100 %]
> (268)
> mem_map : ffffea001d500000
> pfn_start : 860000
> pfn_end : 868000
> mem_map (269)
> mem_map : ffffea001d6c0000
> pfn_start : 868000
> pfn_end : 870000
> mem_map (270)
> mem_map : ffffea001d880000
> pfn_start : 870000
> pfn_end : 878000
> mem_map (271)
> mem_map : ffffea001da40000
> pfn_start : 878000
> pfn_end : 880000
> STEP [Excluding unnecessary pages] : 11.224292 seconds
> STEP [Excluding unnecessary pages] : 11.250834 seconds
> STEP [Copying data ] : 11.407836 seconds
> Writing erase info...
> offset_eraseinfo: 6c0eb8, size_eraseinfo: 0
>
> Original pages : 0x00000000007ec289
> Excluded pages : 0x00000000007b9efb
> Pages filled with zero : 0x0000000000000000
> Cache pages : 0x0000000000012cff
> Cache pages + private : 0x0000000000012015
> User process data pages : 0x0000000000001ece
> Free pages : 0x0000000000793319
> Remaining pages : 0x000000000003238e
> (The number of pages is reduced to 2%.)
> Memory Hole : 0x0000000000093d77
> --------------------------------------------------
> Total pages : 0x0000000000880000
>
>
> The dumpfile is saved to /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-1.
>
> makedumpfile Completed.
> [ perf record: Woken up 55 times to write data ]
> [ perf record: Captured and wrote 13.735 MB /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data1 (~600084 samples) ]
> sadump: does not have partition header
> sadump: read dump device as unknown format
> sadump: unknown format
> LOAD (0)
> phys_start : 1000000
> phys_end : 22f1000
> virt_start : ffffffff81000000
> virt_end : ffffffff822f1000
> LOAD (1)
> phys_start : 10000
> phys_end : 9b000
> virt_start : ffff880000010000
> virt_end : ffff88000009b000
> LOAD (2)
> phys_start : 100000
> phys_end : 27000000
> virt_start : ffff880000100000
> virt_end : ffff880027000000
> LOAD (3)
> phys_start : 37000000
> phys_end : 7b00d000
> virt_start : ffff880037000000
> virt_end : ffff88007b00d000
> LOAD (4)
> phys_start : 100000000
> phys_end : 880000000
> virt_start : ffff880100000000
> virt_end : ffff880880000000
> Linux kdump
> page_size : 4096
> page_size : 4096
>
> max_mapnr : 880000
>
> Buffer size for the cyclic mode: 2228224
>
> num of NODEs : 4
>
>
> Memory type : SPARSEMEM_EX
>
> mem_map (0)
> mem_map : ffffea0000000000
> pfn_start : 0
> pfn_end : 8000
> mem_map (1)
> mem_map : ffffea00001c0000
> pfn_start : 8000
> pfn_end : 10000
> mem_map (2)
> mem_map : ffffea0000380000
> pfn_start : 10000
> pfn_end : 18000
> mem_map (3)
> mem_map : ffffea0000540000
> pfn_start : 18000
> pfn_end : 20000
> mem_map (4)
> mem_map : ffffea0000700000
> pfn_start : 20000
> pfn_end : 28000
> mem_map (5)
> mem_map : ffffea00008c0000
> pfn_start : 28000
> pfn_end : 30000
> mem_map (6)
> mem_map : ffffea0000a80000
> pfn_start : 30000
> pfn_end : 38000
> mem_map (7)
> mem_map : ffffea0000c40000
> pfn_start : 38000
> pfn_end : 40000
> mem_map (8)
> mem_map : ffffea0000e00000
> pfn_start : 40000
> pfn_end : 48000
> mem_map (9)
> mem_map : ffffea0000fc0000
> pfn_start : 48000
> pfn_end : 50000
> mem_map (10)
> mem_map : ffffea0001180000
> pfn_start : 50000
> pfn_end : 58000
> mem_map (11)
> mem_map : ffffea0001340000
> pfn_start : 58000
> pfn_end : 60000
> mem_map (12)
> mem_map : ffffea0001500000
> pfn_start : 60000
> pfn_end : 68000
> mem_map (13)
> mem_map : ffffea00016c0000
> pfn_start : 68000
> pfn_end : 70000
> mem_map (14)
> mem_map : ffffea0001880000
> pfn_start : 70000
> pfn_end : 78000
> mem_map (15)
> mem_map : ffffea0001a40000
> pfn_start : 78000
> pfn_end : 80000
> mem_map (16)
> mem_map : 0
> pfn_start : 80000
> pfn_end : 88000
> mem_map (17)
> mem_map : 0
> pfn_start : 88000
> pfn_end : 90000
> mem_map (18)
> mem_map : 0
> pfn_start : 90000
> pfn_end : 98000
> mem_map (19)
> mem_map : 0
> pfn_start : 98000
> pfn_end : a0000
> mem_map (20)
> mem_map : 0
> pfn_start : a0000
> pfn_end : a8000
> mem_map (21)
> mem_map : 0
> pfn_start : a8000
> pfn_end : b0000
> mem_map (22)
> mem_map : 0
> pfn_start : b0000
> pfn_end : b8000
> mem_map (23)
> mem_map : 0
> pfn_start : b8000
> pfn_end : c0000
> mem_map (24)
> mem_map : 0
> pfn_start : c0000
> pfn_end : c8000
> mem_map (25)
> mem_map : 0
> pfn_start : c8000
> pfn_end : d0000
> mem_map (26)
> mem_map : 0
> pfn_start : d0000
> pfn_end : d8000
> mem_map (27)
> mem_map : 0
> pfn_start : d8000
> pfn_end : e0000
> mem_map (28)
> mem_map : 0
> pfn_start : e0000
> pfn_end : e8000
> mem_map (29)
> mem_map : 0
> pfn_start : e8000
> pfn_end : f0000
> mem_map (30)
> mem_map : 0
> pfn_start : f0000
> pfn_end : f8000
> mem_map (31)
> mem_map : 0
> pfn_start : f8000
> pfn_end : 100000
> mem_map (32)
> mem_map : ffffea0003800000
> pfn_start : 100000
> pfn_end : 108000
> mem_map (33)
> mem_map : ffffea00039c0000
> pfn_start : 108000
> pfn_end : 110000
> mem_map (34)
> mem_map : ffffea0003b80000
> pfn_start : 110000
> pfn_end : 118000
> mem_map (35)
> mem_map : ffffea0003d40000
> pfn_start : 118000
> pfn_end : 120000
> mem_map (36)
> mem_map : ffffea0003f00000
> pfn_start : 120000
> pfn_end : 128000
> mem_map (37)
> mem_map : ffffea00040c0000
> pfn_start : 128000
> pfn_end : 130000
> mem_map (38)
> mem_map : ffffea0004280000
> pfn_start : 130000
> pfn_end : 138000
> mem_map (39)
> mem_map : ffffea0004440000
> pfn_start : 138000
> pfn_end : 140000
> mem_map (40)
> mem_map : ffffea0004600000
> pfn_start : 140000
> pfn_end : 148000
> mem_map (41)
> mem_map : ffffea00047c0000
> pfn_start : 148000
> pfn_end : 150000
> mem_map (42)
> mem_map : ffffea0004980000
> pfn_start : 150000
> pfn_end : 158000
> mem_map (43)
> mem_map : ffffea0004b40000
> pfn_start : 158000
> pfn_end : 160000
> mem_map (44)
> mem_map : ffffea0004d00000
> pfn_start : 160000
> pfn_end : 168000
> mem_map (45)
> mem_map : ffffea0004ec0000
> pfn_start : 168000
> pfn_end : 170000
> mem_map (46)
> mem_map : ffffea0005080000
> pfn_start : 170000
> pfn_end : 178000
> mem_map (47)
> mem_map : ffffea0005240000
> pfn_start : 178000
> pfn_end : 180000
> mem_map (48)
> mem_map : ffffea0005400000
> pfn_start : 180000
> pfn_end : 188000
> mem_map (49)
> mem_map : ffffea00055c0000
> pfn_start : 188000
> pfn_end : 190000
> mem_map (50)
> mem_map : ffffea0005780000
> pfn_start : 190000
> pfn_end : 198000
> mem_map (51)
> mem_map : ffffea0005940000
> pfn_start : 198000
> pfn_end : 1a0000
> mem_map (52)
> mem_map : ffffea0005b00000
> pfn_start : 1a0000
> pfn_end : 1a8000
> mem_map (53)
> mem_map : ffffea0005cc0000
> pfn_start : 1a8000
> pfn_end : 1b0000
> mem_map (54)
> mem_map : ffffea0005e80000
> pfn_start : 1b0000
> pfn_end : 1b8000
> mem_map (55)
> mem_map : ffffea0006040000
> pfn_start : 1b8000
> pfn_end : 1c0000
> mem_map (56)
> mem_map : ffffea0006200000
> pfn_start : 1c0000
> pfn_end : 1c8000
> mem_map (57)
> mem_map : ffffea00063c0000
> pfn_start : 1c8000
> pfn_end : 1d0000
> mem_map (58)
> mem_map : ffffea0006580000
> pfn_start : 1d0000
> pfn_end : 1d8000
> mem_map (59)
> mem_map : ffffea0006740000
> pfn_start : 1d8000
> pfn_end : 1e0000
> mem_map (60)
> mem_map : ffffea0006900000
> pfn_start : 1e0000
> pfn_end : 1e8000
> mem_map (61)
> mem_map : ffffea0006ac0000
> pfn_start : 1e8000
> pfn_end : 1f0000
> mem_map (62)
> mem_map : ffffea0006c80000
> pfn_start : 1f0000
> pfn_end : 1f8000
> mem_map (63)
> mem_map : ffffea0006e40000
> pfn_start : 1f8000
> pfn_end : 200000
> mem_map (64)
> mem_map : ffffea0007000000
> pfn_start : 200000
> pfn_end : 208000
> mem_map (65)
> mem_map : ffffea00071c0000
> pfn_start : 208000
> pfn_end : 210000
> mem_map (66)
> mem_map : ffffea0007380000
> pfn_start : 210000
> pfn_end : 218000
> mem_map (67)
> mem_map : ffffea0007540000
> pfn_start : 218000
> pfn_end : 220000
> mem_map (68)
> mem_map : ffffea0007700000
> pfn_start : 220000
> pfn_end : 228000
> mem_map (69)
> mem_map : ffffea00078c0000
> pfn_start : 228000
> pfn_end : 230000
> mem_map (70)
> mem_map : ffffea0007a80000
> pfn_start : 230000
> pfn_end : 238000
> mem_map (71)
> mem_map : ffffea0007c40000
> pfn_start : 238000
> pfn_end : 240000
> mem_map (72)
> mem_map : ffffea0007e00000
> pfn_start : 240000
> pfn_end : 248000
> mem_map (73)
> mem_map : ffffea0007fc0000
> pfn_start : 248000
> pfn_end : 250000
> mem_map (74)
> mem_map : ffffea0008180000
> pfn_start : 250000
> pfn_end : 258000
> mem_map (75)
> mem_map : ffffea0008340000
> pfn_start : 258000
> pfn_end : 260000
> mem_map (76)
> mem_map : ffffea0008500000
> pfn_start : 260000
> pfn_end : 268000
> mem_map (77)
> mem_map : ffffea00086c0000
> pfn_start : 268000
> pfn_end : 270000
> mem_map (78)
> mem_map : ffffea0008880000
> pfn_start : 270000
> pfn_end : 278000
> mem_map (79)
> mem_map : ffffea0008a40000
> pfn_start : 278000
> pfn_end : 280000
> mem_map (80)
> mem_map : ffffea0008c00000
> pfn_start : 280000
> pfn_end : 288000
> mem_map (81)
> mem_map : ffffea0008dc0000
> pfn_start : 288000
> pfn_end : 290000
> mem_map (82)
> mem_map : ffffea0008f80000
> pfn_start : 290000
> pfn_end : 298000
> mem_map (83)
> mem_map : ffffea0009140000
> pfn_start : 298000
> pfn_end : 2a0000
> mem_map (84)
> mem_map : ffffea0009300000
> pfn_start : 2a0000
> pfn_end : 2a8000
> mem_map (85)
> mem_map : ffffea00094c0000
> pfn_start : 2a8000
> pfn_end : 2b0000
> mem_map (86)
> mem_map : ffffea0009680000
> pfn_start : 2b0000
> pfn_end : 2b8000
> mem_map (87)
> mem_map : ffffea0009840000
> pfn_start : 2b8000
> pfn_end : 2c0000
> mem_map (88)
> mem_map : ffffea0009a00000
> pfn_start : 2c0000
> pfn_end : 2c8000
> mem_map (89)
> mem_map : ffffea0009bc0000
> pfn_start : 2c8000
> pfn_end : 2d0000
> mem_map (90)
> mem_map : ffffea0009d80000
> pfn_start : 2d0000
> pfn_end : 2d8000
> mem_map (91)
> mem_map : ffffea0009f40000
> pfn_start : 2d8000
> pfn_end : 2e0000
> mem_map (92)
> mem_map : ffffea000a100000
> pfn_start : 2e0000
> pfn_end : 2e8000
> mem_map (93)
> mem_map : ffffea000a2c0000
> pfn_start : 2e8000
> pfn_end : 2f0000
> mem_map (94)
> mem_map : ffffea000a480000
> pfn_start : 2f0000
> pfn_end : 2f8000
> mem_map (95)
> mem_map : ffffea000a640000
> pfn_start : 2f8000
> pfn_end : 300000
> mem_map (96)
> mem_map : ffffea000a800000
> pfn_start : 300000
> pfn_end : 308000
> mem_map (97)
> mem_map : ffffea000a9c0000
> pfn_start : 308000
> pfn_end : 310000
> mem_map (98)
> mem_map : ffffea000ab80000
> pfn_start : 310000
> pfn_end : 318000
> mem_map (99)
> mem_map : ffffea000ad40000
> pfn_start : 318000
> pfn_end : 320000
> mem_map (100)
> mem_map : ffffea000af00000
> pfn_start : 320000
> pfn_end : 328000
> mem_map (101)
> mem_map : ffffea000b0c0000
> pfn_start : 328000
> pfn_end : 330000
> mem_map (102)
> mem_map : ffffea000b280000
> pfn_start : 330000
> pfn_end : 338000
> mem_map (103)
> mem_map : ffffea000b440000
> pfn_start : 338000
> pfn_end : 340000
> mem_map (104)
> mem_map : ffffea000b600000
> pfn_start : 340000
> pfn_end : 348000
> mem_map (105)
> mem_map : ffffea000b7c0000
> pfn_start : 348000
> pfn_end : 350000
> mem_map (106)
> mem_map : ffffea000b980000
> pfn_start : 350000
> pfn_end : 358000
> mem_map (107)
> mem_map : ffffea000bb40000
> pfn_start : 358000
> pfn_end : 360000
> mem_map (108)
> mem_map : ffffea000bd00000
> pfn_start : 360000
> pfn_end : 368000
> mem_map (109)
> mem_map : ffffea000bec0000
> pfn_start : 368000
> pfn_end : 370000
> mem_map (110)
> mem_map : ffffea000c080000
> pfn_start : 370000
> pfn_end : 378000
> mem_map (111)
> mem_map : ffffea000c240000
> pfn_start : 378000
> pfn_end : 380000
> mem_map (112)
> mem_map : ffffea000c400000
> pfn_start : 380000
> pfn_end : 388000
> mem_map (113)
> mem_map : ffffea000c5c0000
> pfn_start : 388000
> pfn_end : 390000
> mem_map (114)
> mem_map : ffffea000c780000
> pfn_start : 390000
> pfn_end : 398000
> mem_map (115)
> mem_map : ffffea000c940000
> pfn_start : 398000
> pfn_end : 3a0000
> mem_map (116)
> mem_map : ffffea000cb00000
> pfn_start : 3a0000
> pfn_end : 3a8000
> mem_map (117)
> mem_map : ffffea000ccc0000
> pfn_start : 3a8000
> pfn_end : 3b0000
> mem_map (118)
> mem_map : ffffea000ce80000
> pfn_start : 3b0000
> pfn_end : 3b8000
> mem_map (119)
> mem_map : ffffea000d040000
> pfn_start : 3b8000
> pfn_end : 3c0000
> mem_map (120)
> mem_map : ffffea000d200000
> pfn_start : 3c0000
> pfn_end : 3c8000
> mem_map (121)
> mem_map : ffffea000d3c0000
> pfn_start : 3c8000
> pfn_end : 3d0000
> mem_map (122)
> mem_map : ffffea000d580000
> pfn_start : 3d0000
> pfn_end : 3d8000
> mem_map (123)
> mem_map : ffffea000d740000
> pfn_start : 3d8000
> pfn_end : 3e0000
> mem_map (124)
> mem_map : ffffea000d900000
> pfn_start : 3e0000
> pfn_end : 3e8000
> mem_map (125)
> mem_map : ffffea000dac0000
> pfn_start : 3e8000
> pfn_end : 3f0000
> mem_map (126)
> mem_map : ffffea000dc80000
> pfn_start : 3f0000
> pfn_end : 3f8000
> mem_map (127)
> mem_map : ffffea000de40000
> pfn_start : 3f8000
> pfn_end : 400000
> mem_map (128)
> mem_map : ffffea000e000000
> pfn_start : 400000
> pfn_end : 408000
> mem_map (129)
> mem_map : ffffea000e1c0000
> pfn_start : 408000
> pfn_end : 410000
> mem_map (130)
> mem_map : ffffea000e380000
> pfn_start : 410000
> pfn_end : 418000
> mem_map (131)
> mem_map : ffffea000e540000
> pfn_start : 418000
> pfn_end : 420000
> mem_map (132)
> mem_map : ffffea000e700000
> pfn_start : 420000
> pfn_end : 428000
> mem_map (133)
> mem_map : ffffea000e8c0000
> pfn_start : 428000
> pfn_end : 430000
> mem_map (134)
> mem_map : ffffea000ea80000
> pfn_start : 430000
> pfn_end : 438000
> mem_map (135)
> mem_map : ffffea000ec40000
> pfn_start : 438000
> pfn_end : 440000
> mem_map (136)
> mem_map : ffffea000ee00000
> pfn_start : 440000
> pfn_end : 448000
> mem_map (137)
> mem_map : ffffea000efc0000
> pfn_start : 448000
> pfn_end : 450000
> mem_map (138)
> mem_map : ffffea000f180000
> pfn_start : 450000
> pfn_end : 458000
> mem_map (139)
> mem_map : ffffea000f340000
> pfn_start : 458000
> pfn_end : 460000
> mem_map (140)
> mem_map : ffffea000f500000
> pfn_start : 460000
> pfn_end : 468000
> mem_map (141)
> mem_map : ffffea000f6c0000
> pfn_start : 468000
> pfn_end : 470000
> mem_map (142)
> mem_map : ffffea000f880000
> pfn_start : 470000
> pfn_end : 478000
> mem_map (143)
> mem_map : ffffea000fa40000
> pfn_start : 478000
> pfn_end : 480000
> mem_map (144)
> mem_map : ffffea000fc00000
> pfn_start : 480000
> pfn_end : 488000
> mem_map (145)
> mem_map : ffffea000fdc0000
> pfn_start : 488000
> pfn_end : 490000
> mem_map (146)
> mem_map : ffffea000ff80000
> pfn_start : 490000
> pfn_end : 498000
> mem_map (147)
> mem_map : ffffea0010140000
> pfn_start : 498000
> pfn_end : 4a0000
> mem_map (148)
> mem_map : ffffea0010300000
> pfn_start : 4a0000
> pfn_end : 4a8000
> mem_map (149)
> mem_map : ffffea00104c0000
> pfn_start : 4a8000
> pfn_end : 4b0000
> mem_map (150)
> mem_map : ffffea0010680000
> pfn_start : 4b0000
> pfn_end : 4b8000
> mem_map (151)
> mem_map : ffffea0010840000
> pfn_start : 4b8000
> pfn_end : 4c0000
> mem_map (152)
> mem_map : ffffea0010a00000
> pfn_start : 4c0000
> pfn_end : 4c8000
> mem_map (153)
> mem_map : ffffea0010bc0000
> pfn_start : 4c8000
> pfn_end : 4d0000
> mem_map (154)
> mem_map : ffffea0010d80000
> pfn_start : 4d0000
> pfn_end : 4d8000
> mem_map (155)
> mem_map : ffffea0010f40000
> pfn_start : 4d8000
> pfn_end : 4e0000
> mem_map (156)
> mem_map : ffffea0011100000
> pfn_start : 4e0000
> pfn_end : 4e8000
> mem_map (157)
> mem_map : ffffea00112c0000
> pfn_start : 4e8000
> pfn_end : 4f0000
> mem_map (158)
> mem_map : ffffea0011480000
> pfn_start : 4f0000
> pfn_end : 4f8000
> mem_map (159)
> mem_map : ffffea0011640000
> pfn_start : 4f8000
> pfn_end : 500000
> mem_map (160)
> mem_map : ffffea0011800000
> pfn_start : 500000
> pfn_end : 508000
> mem_map (161)
> mem_map : ffffea00119c0000
> pfn_start : 508000
> pfn_end : 510000
> mem_map (162)
> mem_map : ffffea0011b80000
> pfn_start : 510000
> pfn_end : 518000
> mem_map (163)
> mem_map : ffffea0011d40000
> pfn_start : 518000
> pfn_end : 520000
> mem_map (164)
> mem_map : ffffea0011f00000
> pfn_start : 520000
> pfn_end : 528000
> mem_map (165)
> mem_map : ffffea00120c0000
> pfn_start : 528000
> pfn_end : 530000
> mem_map (166)
> mem_map : ffffea0012280000
> pfn_start : 530000
> pfn_end : 538000
> mem_map (167)
> mem_map : ffffea0012440000
> pfn_start : 538000
> pfn_end : 540000
> mem_map (168)
> mem_map : ffffea0012600000
> pfn_start : 540000
> pfn_end : 548000
> mem_map (169)
> mem_map : ffffea00127c0000
> pfn_start : 548000
> pfn_end : 550000
> mem_map (170)
> mem_map : ffffea0012980000
> pfn_start : 550000
> pfn_end : 558000
> mem_map (171)
> mem_map : ffffea0012b40000
> pfn_start : 558000
> pfn_end : 560000
> mem_map (172)
> mem_map : ffffea0012d00000
> pfn_start : 560000
> pfn_end : 568000
> mem_map (173)
> mem_map : ffffea0012ec0000
> pfn_start : 568000
> pfn_end : 570000
> mem_map (174)
> mem_map : ffffea0013080000
> pfn_start : 570000
> pfn_end : 578000
> mem_map (175)
> mem_map : ffffea0013240000
> pfn_start : 578000
> pfn_end : 580000
> mem_map (176)
> mem_map : ffffea0013400000
> pfn_start : 580000
> pfn_end : 588000
> mem_map (177)
> mem_map : ffffea00135c0000
> pfn_start : 588000
> pfn_end : 590000
> mem_map (178)
> mem_map : ffffea0013780000
> pfn_start : 590000
> pfn_end : 598000
> mem_map (179)
> mem_map : ffffea0013940000
> pfn_start : 598000
> pfn_end : 5a0000
> mem_map (180)
> mem_map : ffffea0013b00000
> pfn_start : 5a0000
> pfn_end : 5a8000
> mem_map (181)
> mem_map : ffffea0013cc0000
> pfn_start : 5a8000
> pfn_end : 5b0000
> mem_map (182)
> mem_map : ffffea0013e80000
> pfn_start : 5b0000
> pfn_end : 5b8000
> mem_map (183)
> mem_map : ffffea0014040000
> pfn_start : 5b8000
> pfn_end : 5c0000
> mem_map (184)
> mem_map : ffffea0014200000
> pfn_start : 5c0000
> pfn_end : 5c8000
> mem_map (185)
> mem_map : ffffea00143c0000
> pfn_start : 5c8000
> pfn_end : 5d0000
> mem_map (186)
> mem_map : ffffea0014580000
> pfn_start : 5d0000
> pfn_end : 5d8000
> mem_map (187)
> mem_map : ffffea0014740000
> pfn_start : 5d8000
> pfn_end : 5e0000
> mem_map (188)
> mem_map : ffffea0014900000
> pfn_start : 5e0000
> pfn_end : 5e8000
> mem_map (189)
> mem_map : ffffea0014ac0000
> pfn_start : 5e8000
> pfn_end : 5f0000
> mem_map (190)
> mem_map : ffffea0014c80000
> pfn_start : 5f0000
> pfn_end : 5f8000
> mem_map (191)
> mem_map : ffffea0014e40000
> pfn_start : 5f8000
> pfn_end : 600000
> mem_map (192)
> mem_map : ffffea0015000000
> pfn_start : 600000
> pfn_end : 608000
> mem_map (193)
> mem_map : ffffea00151c0000
> pfn_start : 608000
> pfn_end : 610000
> mem_map (194)
> mem_map : ffffea0015380000
> pfn_start : 610000
> pfn_end : 618000
> mem_map (195)
> mem_map : ffffea0015540000
> pfn_start : 618000
> pfn_end : 620000
> mem_map (196)
> mem_map : ffffea0015700000
> pfn_start : 620000
> pfn_end : 628000
> mem_map (197)
> mem_map : ffffea00158c0000
> pfn_start : 628000
> pfn_end : 630000
> mem_map (198)
> mem_map : ffffea0015a80000
> pfn_start : 630000
> pfn_end : 638000
> mem_map (199)
> mem_map : ffffea0015c40000
> pfn_start : 638000
> pfn_end : 640000
> mem_map (200)
> mem_map : ffffea0015e00000
> pfn_start : 640000
> pfn_end : 648000
> mem_map (201)
> mem_map : ffffea0015fc0000
> pfn_start : 648000
> pfn_end : 650000
> mem_map (202)
> mem_map : ffffea0016180000
> pfn_start : 650000
> pfn_end : 658000
> mem_map (203)
> mem_map : ffffea0016340000
> pfn_start : 658000
> pfn_end : 660000
> mem_map (204)
> mem_map : ffffea0016500000
> pfn_start : 660000
> pfn_end : 668000
> mem_map (205)
> mem_map : ffffea00166c0000
> pfn_start : 668000
> pfn_end : 670000
> mem_map (206)
> mem_map : ffffea0016880000
> pfn_start : 670000
> pfn_end : 678000
> mem_map (207)
> mem_map : ffffea0016a40000
> pfn_start : 678000
> pfn_end : 680000
> mem_map (208)
> mem_map : ffffea0016c00000
> pfn_start : 680000
> pfn_end : 688000
> mem_map (209)
> mem_map : ffffea0016dc0000
> pfn_start : 688000
> pfn_end : 690000
> mem_map (210)
> mem_map : ffffea0016f80000
> pfn_start : 690000
> pfn_end : 698000
> mem_map (211)
> mem_map : ffffea0017140000
> pfn_start : 698000
> pfn_end : 6a0000
> mem_map (212)
> mem_map : ffffea0017300000
> pfn_start : 6a0000
> pfn_end : 6a8000
> mem_map (213)
> mem_map : ffffea00174c0000
> pfn_start : 6a8000
> pfn_end : 6b0000
> mem_map (214)
> mem_map : ffffea0017680000
> pfn_start : 6b0000
> pfn_end : 6b8000
> mem_map (215)
> mem_map : ffffea0017840000
> pfn_start : 6b8000
> pfn_end : 6c0000
> mem_map (216)
> mem_map : ffffea0017a00000
> pfn_start : 6c0000
> pfn_end : 6c8000
> mem_map (217)
> mem_map : ffffea0017bc0000
> pfn_start : 6c8000
> pfn_end : 6d0000
> mem_map (218)
> mem_map : ffffea0017d80000
> pfn_start : 6d0000
> pfn_end : 6d8000
> mem_map (219)
> mem_map : ffffea0017f40000
> pfn_start : 6d8000
> pfn_end : 6e0000
> mem_map (220)
> mem_map : ffffea0018100000
> pfn_start : 6e0000
> pfn_end : 6e8000
> mem_map (221)
> mem_map : ffffea00182c0000
> pfn_start : 6e8000
> pfn_end : 6f0000
> mem_map (222)
> mem_map : ffffea0018480000
> pfn_start : 6f0000
> pfn_end : 6f8000
> mem_map (223)
> mem_map : ffffea0018640000
> pfn_start : 6f8000
> pfn_end : 700000
> mem_map (224)
> mem_map : ffffea0018800000
> pfn_start : 700000
> pfn_end : 708000
> mem_map (225)
> mem_map : ffffea00189c0000
> pfn_start : 708000
> pfn_end : 710000
> mem_map (226)
> mem_map : ffffea0018b80000
> pfn_start : 710000
> pfn_end : 718000
> mem_map (227)
> mem_map : ffffea0018d40000
> pfn_start : 718000
> pfn_end : 720000
> mem_map (228)
> mem_map : ffffea0018f00000
> pfn_start : 720000
> pfn_end : 728000
> mem_map (229)
> mem_map : ffffea00190c0000
> pfn_start : 728000
> pfn_end : 730000
> mem_map (230)
> mem_map : ffffea0019280000
> pfn_start : 730000
> pfn_end : 738000
> mem_map (231)
> mem_map : ffffea0019440000
> pfn_start : 738000
> pfn_end : 740000
> mem_map (232)
> mem_map : ffffea0019600000
> pfn_start : 740000
> pfn_end : 748000
> mem_map (233)
> mem_map : ffffea00197c0000
> pfn_start : 748000
> pfn_end : 750000
> mem_map (234)
> mem_map : ffffea0019980000
> pfn_start : 750000
> pfn_end : 758000
> mem_map (235)
> mem_map : ffffea0019b40000
> pfn_start : 758000
> pfn_end : 760000
> mem_map (236)
> mem_map : ffffea0019d00000
> pfn_start : 760000
> pfn_end : 768000
> mem_map (237)
> mem_map : ffffea0019ec0000
> pfn_start : 768000
> pfn_end : 770000
> mem_map (238)
> mem_map : ffffea001a080000
> pfn_start : 770000
> pfn_end : 778000
> mem_map (239)
> mem_map : ffffea001a240000
> pfn_start : 778000
> pfn_end : 780000
> mem_map (240)
> mem_map : ffffea001a400000
> pfn_start : 780000
> pfn_end : 788000
> mem_map (241)
> mem_map : ffffea001a5c0000
> pfn_start : 788000
> pfn_end : 790000
> mem_map (242)
> mem_map : ffffea001a780000
> pfn_start : 790000
> pfn_end : 798000
> mem_map (243)
> mem_map : ffffea001a940000
> pfn_start : 798000
> pfn_end : 7a0000
> mem_map (244)
> mem_map : ffffea001ab00000
> pfn_start : 7a0000
> pfn_end : 7a8000
> mem_map (245)
> mem_map : ffffea001acc0000
> pfn_start : 7a8000
> pfn_end : 7b0000
> mem_map (246)
> mem_map : ffffea001ae80000
> pfn_start : 7b0000
> pfn_end : 7b8000
> mem_map (247)
> mem_map : ffffea001b040000
> pfn_start : 7b8000
> pfn_end : 7c0000
> mem_map (248)
> mem_map : ffffea001b200000
> pfn_start : 7c0000
> pfn_end : 7c8000
> mem_map (249)
> mem_map : ffffea001b3c0000
> pfn_start : 7c8000
> pfn_end : 7d0000
> mem_map (250)
> mem_map : ffffea001b580000
> pfn_start : 7d0000
> pfn_end : 7d8000
> mem_map (251)
> mem_map : ffffea001b740000
> pfn_start : 7d8000
> pfn_end : 7e0000
> mem_map (252)
> mem_map : ffffea001b900000
> pfn_start : 7e0000
> pfn_end : 7e8000
> mem_map (253)
> mem_map : ffffea001bac0000
> pfn_start : 7e8000
> pfn_end : 7f0000
> mem_map (254)
> mem_map : ffffea001bc80000
> pfn_start : 7f0000
> pfn_end : 7f8000
> mem_map (255)
> mem_map : ffffea001be40000
> pfn_start : 7f8000
> pfn_end : 800000
> mem_map (256)
> mem_map : ffffea001c000000
> pfn_start : 800000
> pfn_end : 808000
> mem_map (257)
> mem_map : ffffea001c1c0000
> pfn_start : 808000
> pfn_end : 810000
> mem_map (258)
> mem_map : ffffea001c380000
> pfn_start : 810000
> pfn_end : 818000
> mem_map (259)
> mem_map : ffffea001c540000
> pfn_start : 818000
> pfn_end : 820000
> mem_map (260)
> mem_map : ffffea001c700000
> pfn_start : 820000
> pfn_end : 828000
> mem_map (261)
> mem_map : ffffea001c8c0000
> pfn_start : 828000
> pfn_end : 830000
> mem_map (262)
> mem_map : ffffea001ca80000
> pfn_start : 830000
> pfn_end : 838000
> mem_map (263)
> mem_map : ffffea001cc40000
> pfn_start : 838000
> pfn_end : 840000
> mem_map (264)
> mem_map : ffffea001ce00000
> pfn_start : 840000
> pfn_end : 848000
> mem_map (265)
> mem_map : ffffea001cfc0000
> pfn_start : 848000
> pfn_end : 850000
> mem_map (266)
> mem_map : ffffea001d180000
> pfn_start : 850000
> pfn_end : 858000
> mem_map (267)
> mem_map : ffffea001d340000
> pfn_start : 858000
> pfn_end : 860000
> mem_map\rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [100 %] \rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [100 %]
> (268)
> mem_map : ffffea001d500000
> pfn_start : 860000
> pfn_end : 868000
> mem_map (269)
> mem_map : ffffea001d6c0000
> pfn_start : 868000
> pfn_end : 870000
> mem_map (270)
> mem_map : ffffea001d880000
> pfn_start : 870000
> pfn_end : 878000
> mem_map (271)
> mem_map : ffffea001da40000
> pfn_start : 878000
> pfn_end : 880000
> STEP [Excluding unnecessary pages] : 0.438936 seconds
> STEP [Excluding unnecessary pages] : 0.467304 seconds
> STEP [Copying data ] : 0.624328 seconds
> Writing erase info...
> offset_eraseinfo: 6c0eb8, size_eraseinfo: 0
>
> Original pages : 0x00000000007ec289
> Excluded pages : 0x00000000007b9efb
> Pages filled with zero : 0x0000000000000000
> Cache pages : 0x0000000000012cff
> Cache pages + private : 0x0000000000012015
> User process data pages : 0x0000000000001ece
> Free pages : 0x0000000000793319
> Remaining pages : 0x000000000003238e
> (The number of pages is reduced to 2%.)
> Memory Hole : 0x0000000000093d77
> --------------------------------------------------
> Total pages : 0x0000000000880000
>
>
> The dumpfile is saved to /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-2.
>
> makedumpfile Completed.
> [ perf record: Woken up 3 times to write data ]
> [ perf record: Captured and wrote 0.598 MB /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data2 (~26144 samples) ]
> Failed to open [ext4], continuing without symbols
> No kallsyms or vmlinux with build-id a77a2293aab413880b8b361bb5b863a1680c8eab was found
> [qla2xxx] with build id a77a2293aab413880b8b361bb5b863a1680c8eab not found, continuing without symbols
> Failed to open [dm_mirror], continuing without symbols
> No kallsyms or vmlinux with build-id 8e4a472eadb14fb0cde985ef8571b543880472dd was found
> [megaraid_sas] with build id 8e4a472eadb14fb0cde985ef8571b543880472dd not found, continuing without symbols
> No kallsyms or vmlinux with build-id 93346fc362be38e207aeaae310a339fb502d9acb was found
> [jbd2] with build id 93346fc362be38e207aeaae310a339fb502d9acb not found, continuing without symbols
> # ========
> # captured on: Fri Dec 7 16:45:43 2012
> # hostname : (none)
> # os release : 3.7.0-rc8-cliff-bench+
> # perf version : 3.7.rc8.3.ge0fb22
> # arch : x86_64
> # nrcpus online : 1
> # nrcpus avail : 1
> # cpudesc : Intel(R) Xeon(R) CPU E7- 4820 @ 2.00GHz
> # cpuid : GenuineIntel,6,47,2
> # total memory : 240104 kB
> # cmdline : /var/crash/perf record -g -o /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data1 /var/crash/makedumpfile-cliff --message-level 31 -i /var/crash/vmcoreinfo.txt -N -o -d 31 /proc/vmcore /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-1
> # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 2 }
> # HEADER_CPU_TOPOLOGY info available, use -I to display
> # HEADER_NUMA_TOPOLOGY info available, use -I to display
> # pmu mappings: cpu = 4, software = 1, tracepoint = 2, uncore_bbox_0 = 15, uncore_bbox_1 = 16, uncore_cbox_0 = 7, uncore_cbox_1 = 8, uncore_cbox_2 = 9, uncore_cbox_3 = 10, uncore_cbox_4 = 11, uncore_cbox_5 = 12, uncore_cbox_6 = 13, uncore_cbox_7 = 14, uncore_mbox_0 = 19, uncore_mbox_1 = 20, uncore_rbox_0 = 21, uncore_rbox_1 = 22, uncore_sbox_0 = 17, uncore_sbox_1 = 18, breakpoint = 5, uncore_ubox = 6, uncore_wbox = 23
> # ========
> #
> # Samples: 91K of event 'cycles'
> # Event count (approx.): 23676246537
> #
> # Overhead Command Shared Object
> # ........ ............... ....................
> #
> 90.38% makedumpfile-cl [kernel.kallsyms]
> |
> |--19.73%-- __purge_vmap_area_lazy
> | |
> | |--80.50%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--66.59%-- 0x0
> | | |
> | | --33.41%-- 0x45524f4300000001
> | |
> | |--19.43%-- vm_unmap_aliases
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.07%-- [...]
> |
> |--15.58%-- try_preserve_large_page
> | |
> | |--99.97%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.03%-- [...]
> |
> |--14.51%-- iomem_map_sanity_check
> | |
> | |--99.97%-- __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.01%-- 0x6e6d2f0065726f63
> | | |
> | | --49.99%-- 0x45524f4300000001
> | --0.03%-- [...]
> |
> |--11.06%-- walk_system_ram_range
> | |
> | |--64.71%-- pat_pagerange_is_ram
> | | |
> | | |--50.87%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | --49.13%-- reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--34.75%-- page_is_ram
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.54%-- [...]
> |
> |--4.84%-- __phys_addr
> | |
> | |--52.48%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--45.72%-- try_preserve_large_page
> | | __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --1.80%-- [...]
> |
> |--4.82%-- __get_vm_area_node
> | |
> | |--99.70%-- get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | --0.30%-- [...]
> |
> |--4.13%-- iounmap
> | |
> | |--99.59%-- copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.39%-- 0x45524f4300000001
> | | |
> | | --49.61%-- 0x0
> | --0.41%-- [...]
> |
> |--3.60%-- read_vmcore
> | |
> | |--99.83%-- proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.17%-- [...]
> |
> |--2.24%-- copy_user_generic_string
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.92%-- remove_vm_area
> | |
> | |--99.31%-- iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | |
> | --0.69%-- copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.82%-- do_kernel_range_flush
> | |
> | |--99.20%-- on_each_cpu
> | | flush_tlb_kernel_range
> | | __purge_vmap_area_lazy
> | | free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --0.80%-- flush_tlb_kernel_range
> | __purge_vmap_area_lazy
> | free_vmap_area_noflush
> | free_unmap_vmap_area
> | remove_vm_area
> | iounmap
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.01%-- rbt_memtype_erase
> | |
> | |--96.66%-- free_memtype
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --3.34%-- iounmap
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.87%-- kfree
> | |
> | |--55.52%-- free_memtype
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--29.00%-- iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--12.42%-- rcu_do_batch
> | | __rcu_process_callbacks
> | | rcu_process_callbacks
> | | __do_softirq
> | | call_softirq
> | | do_softirq
> | | irq_exit
> | | smp_apic_timer_interrupt
> | | apic_timer_interrupt
> | | |
> | | |--20.23%-- free_vmap_area_noflush
> | | | free_unmap_vmap_area
> | | | remove_vm_area
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--19.11%-- __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--16.82%-- __change_page_attr
> | | | __change_page_attr_set_clr
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--6.75%-- pat_pagerange_is_ram
> | | | |
> | | | |--66.67%-- reserve_memtype
> | | | | __ioremap_caller
> | | | | ioremap_cache
> | | | | copy_oldmem_page
> | | | | read_from_oldmem
> | | | | read_vmcore
> | | | | proc_reg_read
> | | | | vfs_read
> | | | | sys_read
> | | | | system_call_fastpath
> | | | | __read_nocancel
> | | | |
> | | | --33.33%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--5.62%-- vm_unmap_aliases
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--4.50%-- proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--4.49%-- copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--3.37%-- get_vm_area_caller
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--3.37%-- readmem
> | | |
> | | |--2.25%-- page_is_ram
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--2.25%-- __exclude_unnecessary_pages
> | | | exclude_unnecessary_pages_cyclic
> | | | writeout_dumpfile
> | | | 0x7fff6c26de6d
> | | | 0x64656b616d2f6873
> | | |
> | | |--2.25%-- paddr_to_offset
> | | | exclude_unnecessary_pages_cyclic
> | | | |
> | | | --100.00%-- writeout_dumpfile
> | | | 0x7fff6c26de6d
> | | | 0x64656b616d2f6873
> | | |
> | | |--1.13%-- try_preserve_large_page
> | | | __change_page_attr
> | | | __change_page_attr_set_clr
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- reserve_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- __lseek_nocancel
> | | |
> | | |--1.12%-- proc_reg_llseek
> | | | vfs_llseek
> | | | sys_lseek
> | | | system_call_fastpath
> | | | __lseek_nocancel
> | | |
> | | |--1.12%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- on_each_cpu
> | | | flush_tlb_kernel_range
> | | | __purge_vmap_area_lazy
> | | | free_vmap_area_noflush
> | | | free_unmap_vmap_area
> | | | remove_vm_area
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- __get_vm_area_node
> | | | get_vm_area_caller
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | --1.12%-- vtop4_x86_64
> | |
> | |--2.09%-- copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --0.98%-- __rcu_process_callbacks
> | rcu_process_callbacks
> | __do_softirq
> | call_softirq
> | do_softirq
> | irq_exit
> | smp_apic_timer_interrupt
> | apic_timer_interrupt
> | |
> | |--57.11%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--14.30%-- flush_tlb_kernel_range
> | | __purge_vmap_area_lazy
> | | free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--14.30%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --14.30%-- copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.58%-- __insert_vmap_area
> | |
> | |--98.32%-- alloc_vmap_area
> | | __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --1.68%-- __get_vm_area_node
> | get_vm_area_caller
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.57%-- kmem_cache_alloc_node_trace
> | |
> | |--55.58%-- __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--41.85%-- alloc_vmap_area
> | | __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --2.56%-- get_vm_area_caller
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.54%-- vfs_read
> | |
> | |--98.21%-- sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | |
> | --1.79%-- system_call_fastpath
> | __read_nocancel
> |
> |--0.54%-- memtype_rb_check_conflict
> | |
> | |--95.54%-- rbt_memtype_check_insert
> | | reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --4.46%-- reserve_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.51%-- __mtrr_type_lookup
> | |
> | |--96.91%-- mtrr_type_lookup
> | | reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --3.09%-- reserve_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> --11.15%-- [...]
>
> 9.19% makedumpfile-cl makedumpfile-cliff
> |
> |--37.97%-- __exclude_unnecessary_pages
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--18.73%-- set_bitmap_cyclic
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--13.79%-- paddr_to_offset
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--4.71%-- readmem
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--4.12%-- get_num_dumpable_cyclic
> |
> |--2.90%-- is_in_same_page
> |
> |--2.66%-- page_is_buddy_v3
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.37%-- clear_bit_on_2nd_bitmap_for_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.35%-- create_1st_bitmap_cyclic
> |
> |--2.04%-- is_xen_memory
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.02%-- vtop4_x86_64
> |
> |--1.67%-- set_bit_on_1st_bitmap
> |
> |--1.53%-- clear_bit_on_2nd_bitmap
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--1.25%-- write_kdump_pages_and_bitmap_cyclic
> | writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--1.15%-- update_cyclic_region
> |
> |--0.66%-- vaddr_to_paddr_x86_64
> --0.07%-- [...]
>
> 0.42% makedumpfile-cl libc.so.6
> |
> |--40.25%-- __lseek_nocancel
> |
> |--36.91%-- __read_nocancel
> |
> |--8.64%-- __GI___libc_read
> |
> |--5.01%-- __memset_sse2
> | |
> | --100.00%-- 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--3.90%-- __GI___libc_lseek64
> |
> |--3.72%-- memcpy
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--0.53%-- memchr
> --1.04%-- [...]
>
> 0.01% makedumpfile-cl ld-linux-x86-64.so.2
> |
> |--49.69%-- strcmp
> | |
> | |--67.41%-- 0x8922974
> | | 0x42494c4700342e33
> | |
> | --32.59%-- 0x9691a75
> | 0x42494c4700352e32
> |
> |--17.46%-- _dl_name_match_p
> | _dl_check_all_versions
> |
> |--16.51%-- do_lookup_x
> |
> --16.34%-- _dl_lookup_symbol_x
> _dl_relocate_object
> dl_main
> _dl_sysdep_start
> 0x4156415741e58948
>
> 0.00% makedumpfile-cl libstdc++.so.6
> |
> --- 0x37282bb470
> 0x3728253b43
> 0x7fff6c26de6d
> 0x64656b616d2f6873
>
> 0.00% makedumpfile-cl [megaraid_sas]
> |
> --- megasas_isr
> handle_irq_event_percpu
> handle_irq_event
> handle_edge_irq
> handle_irq
> do_IRQ
> ret_from_intr
> __exclude_unnecessary_pages
> exclude_unnecessary_pages_cyclic
> writeout_dumpfile
> 0x7fff6c26de6d
> 0x64656b616d2f6873
>
> 0.00% makedumpfile-cl [qla2xxx]
> |
> --- qla24xx_mbx_completion
> qla24xx_msix_default
> handle_irq_event_percpu
> handle_irq_event
> handle_edge_irq
> handle_irq
> do_IRQ
> ret_from_intr
> __change_page_attr
> __change_page_attr_set_clr
> change_page_attr_set_clr
> _set_memory_wb
> ioremap_change_attr
> kernel_map_sync_memtype
> __ioremap_caller
> ioremap_cache
> copy_oldmem_page
> read_from_oldmem
> read_vmcore
> proc_reg_read
> vfs_read
> sys_read
> system_call_fastpath
> __read_nocancel
>
> 0.00% makedumpfile-cl [jbd2]
> |
> --- jbd2_journal_start
> ext4_dirty_inode
> __mark_inode_dirty
> update_time
> file_update_time
> __generic_file_aio_write
> generic_file_aio_write
> ext4_file_write
> do_sync_write
> vfs_write
> sys_write
> system_call_fastpath
> __write_nocancel
> 0xffffff0000003725
>
>
>
> Failed to open [dm_mirror], continuing without symbols
> Failed to open [ext4], continuing without symbols
> # ========
> # captured on: Fri Dec 7 16:45:46 2012
> # hostname : (none)
> # os release : 3.7.0-rc8-cliff-bench+
> # perf version : 3.7.rc8.3.ge0fb22
> # arch : x86_64
> # nrcpus online : 1
> # nrcpus avail : 1
> # cpudesc : Intel(R) Xeon(R) CPU E7- 4820 @ 2.00GHz
> # cpuid : GenuineIntel,6,47,2
> # total memory : 240104 kB
> # cmdline : /var/crash/perf record -g -o /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data2 /var/crash/makedumpfile-cliff --message-level 31 -i /var/crash/vmcoreinfo.txt -N -d 31 /proc/vmcore /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-2
> # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 3 }
> # HEADER_CPU_TOPOLOGY info available, use -I to display
> # HEADER_NUMA_TOPOLOGY info available, use -I to display
> # pmu mappings: cpu = 4, software = 1, tracepoint = 2, uncore_bbox_0 = 15, uncore_bbox_1 = 16, uncore_cbox_0 = 7, uncore_cbox_1 = 8, uncore_cbox_2 = 9, uncore_cbox_3 = 10, uncore_cbox_4 = 11, uncore_cbox_5 = 12, uncore_cbox_6 = 13, uncore_cbox_7 = 14, uncore_mbox_0 = 19, uncore_mbox_1 = 20, uncore_rbox_0 = 21, uncore_rbox_1 = 22, uncore_sbox_0 = 17, uncore_sbox_1 = 18, breakpoint = 5, uncore_ubox = 6, uncore_wbox = 23
> # ========
> #
> # Samples: 5K of event 'cycles'
> # Event count (approx.): 1493942335
> #
> # Overhead Command Shared Object
> # ........ ............... ....................
> #
> 51.45% makedumpfile-cl makedumpfile-cliff
> |
> |--51.45%-- set_bitmap_cyclic
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--11.66%-- get_num_dumpable_cyclic
> |
> |--7.96%-- clear_bit_on_2nd_bitmap_for_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--6.93%-- create_1st_bitmap_cyclic
> |
> |--4.52%-- __exclude_unnecessary_pages_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.35%-- clear_bit_on_2nd_bitmap
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.05%-- set_bit_on_1st_bitmap
> |
> |--3.63%-- update_cyclic_region
> |
> |--3.52%-- write_kdump_pages_and_bitmap_cyclic
> | writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--1.87%-- is_xen_memory
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> --0.07%-- [...]
>
> 47.68% makedumpfile-cl [kernel.kallsyms]
> |
> |--77.89%-- write_vmcore_get_excludes
> | write_vmcore_pfn_lists
> | proc_reg_write
> | vfs_write
> | sys_write
> | system_call_fastpath
> | __write_nocancel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--15.34%-- walk_system_ram_range
> | |
> | |--96.92%-- page_is_ram
> | | __ioremap_caller
> | | ioremap_cache
> | | |
> | | |--99.51%-- write_vmcore_get_memmap
> | | | write_vmcore_pfn_lists
> | | | proc_reg_write
> | | | vfs_write
> | | | sys_write
> | | | system_call_fastpath
> | | | __write_nocancel
> | | | 0x7fff0b66fe70
> | | | 0x64656b616d2f6873
> | | --0.49%-- [...]
> | |
> | |--2.84%-- pat_pagerange_is_ram
> | | |
> | | |--58.30%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | | |
> | | | --100.00%-- 0x45524f4300000001
> | | |
> | | --41.70%-- reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.24%-- [...]
> |
> |--0.76%-- __purge_vmap_area_lazy
> | |
> | |--76.20%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.02%-- 0x45524f4300000001
> | | |
> | | --49.98%-- 0x0
> | |
> | --23.80%-- vm_unmap_aliases
> | change_page_attr_set_clr
> | _set_memory_wb
> | ioremap_change_attr
> | kernel_map_sync_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.66%-- iomem_map_sanity_check
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> | |
> | |--50.44%-- 0x45524f4300000001
> | |
> | --49.56%-- 0x0
> |
> |--0.51%-- try_preserve_large_page
> | __change_page_attr
> | __change_page_attr_set_clr
> | change_page_attr_set_clr
> | _set_memory_wb
> | ioremap_change_attr
> | kernel_map_sync_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> --4.84%-- [...]
>
> 0.72% makedumpfile-cl libc.so.6
> |
> |--36.59%-- __memset_sse2
> | |
> | --100.00%-- 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--31.88%-- memcpy
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.88%-- time
> |
> |--4.80%-- _IO_file_xsputn@@GLIBC_2.2.5
> | 0x7f7e97029000
> |
> |--2.46%-- _IO_file_init@@GLIBC_2.2.5
> |
> |--2.45%-- _int_free
> |
> |--2.45%-- 0x372527ffa0
> |
> |--2.44%-- _IO_default_xsputn
> | 0x71e4ef
> |
> |--2.42%-- __lseek_nocancel
> |
> |--2.41%-- _IO_getline_info
> |
> |--2.41%-- __strlen_sse42
> | 0x61705f6769746e6f
> |
> |--2.41%-- _IO_fgets
> | 0x3638343533313d45
> |
> --2.40%-- vfprintf
> fprintf
>
> 0.13% makedumpfile-cl ld-linux-x86-64.so.2
> |
> |--28.61%-- _dl_relocate_object
> | dl_main
> | _dl_sysdep_start
> | 0x4156415741e58948
> |
> |--28.61%-- do_lookup_x
> |
> |--14.96%-- strcmp
> | 0x6e696c2d646c0036
> |
> |--14.34%-- _dl_lookup_symbol_x
> | _dl_relocate_object
> | dl_main
> | _dl_sysdep_start
> | 0x4156415741e58948
> |
> --13.48%-- _dl_sort_fini
> _dl_fini
> exit
>
> 0.02% makedumpfile-cl libstdc++.so.6
> |
> --- std::basic_ios<char, std::char_traits<char> >::init(std::basic_streambuf<char, std::char_traits<char> >*)
> 0x37284ebbe0
> std::basic_ostream<char, std::char_traits<char> >::~basic_ostream()
>
>
>
--
Cliff Wickman
SGI
cpw@sgi.com
(651) 683-3824
[-- Attachment #2: 121210.proc_vmcore2 --]
[-- Type: text/plain, Size: 30805 bytes --]
To: kumagai-atsushi@mxc.nes.nec.co.jp d.hatayama@jp.fujitsu.com
Cc: kexec@lists.infradead.org
Subject: [PATCH] makedumpfile: request the kernel do page scans
From: Cliff Wickman <cpw@sgi.com>
I've been experimenting with asking the kernel to scan the page tables
instead of reading all those page structures through /proc/vmcore.
The results are rather dramatic.
On a small, idle UV: about 4 sec. versus about 40 sec.
On a 8TB UV the unnecessary page scan takes 4 minutes, vs. about 200 min
through /proc/vmcore.
This patch incorporates this scheme into version 1.5.1, so that the cyclic
processing can use the kernel scans.
It also uses the page_is_buddy logic to speed the finding of free pages.
And also allows makedumpfile to work as before with a kernel that does
not provide /proc/vmcore_pfn_lists.
This patch:
- writes requests to new kernel file /proc/vmcore_pfn_lists
- makes request PL_REQUEST_MEMMAP to pass the crash kernel information about
the boot kernel
- makes requests PL_REQUEST_FREE and PL_REQUEST_EXCLUDE, asking the kernel
to return lists of PFNs
- adds page scan timing options -n -o and -t
The patch [PATCH] makedumpfile: fix to exclude_unnecessary_pages_cyclic
is re-done by the below, so that patch should not be applied.
This patch depends on a kernel patch.
Diffed against the released makedumpfile-1.5.1
Signed-off-by: Cliff Wickman <cpw@sgi.com>
---
dwarf_info.c | 2
makedumpfile.c | 523 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
makedumpfile.h | 92 +++++++++-
print_info.c | 5
print_info.h | 3
5 files changed, 601 insertions(+), 24 deletions(-)
Index: makedumpfile-1.5.1.released/makedumpfile.h
===================================================================
--- makedumpfile-1.5.1.released.orig/makedumpfile.h
+++ makedumpfile-1.5.1.released/makedumpfile.h
@@ -86,6 +86,8 @@ int get_mem_type(void);
#define LSEEKED_PDESC (2)
#define LSEEKED_PDATA (3)
+#define EXTRA_MEMMAPS 100
+
/*
* Xen page flags
*/
@@ -418,7 +420,7 @@ do { \
#define KVER_MIN_SHIFT 16
#define KERNEL_VERSION(x,y,z) (((x) << KVER_MAJ_SHIFT) | ((y) << KVER_MIN_SHIFT) | (z))
#define OLDEST_VERSION KERNEL_VERSION(2, 6, 15)/* linux-2.6.15 */
-#define LATEST_VERSION KERNEL_VERSION(3, 6, 7)/* linux-3.6.7 */
+#define LATEST_VERSION KERNEL_VERSION(3, 7, 8)/* linux-3.7.8 */
/*
* vmcoreinfo in /proc/vmcore
@@ -794,9 +796,20 @@ typedef struct {
} xen_crash_info_v2_t;
struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
unsigned long long pfn_start;
unsigned long long pfn_end;
- unsigned long mem_map;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
};
struct dump_bitmap {
@@ -875,6 +888,7 @@ struct DumpInfo {
int flag_rearrange; /* flag of creating dumpfile from
flattened format */
int flag_split; /* splitting vmcore */
+ int flag_use_kernel_lists;
int flag_cyclic; /* cyclic processing to keep memory consumption */
int flag_reassemble; /* reassemble multiple dumpfiles into one */
int flag_refiltering; /* refilter from kdump-compressed file */
@@ -1384,6 +1398,80 @@ struct domain_list {
unsigned int pickled_id;
};
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * limit the size of the pfn list to this many pfn_element structures
+ */
+#define MAX_PFN_LIST 10000
+
+/*
+ * one element in the pfn_list
+ */
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negoiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
#define PAGES_PER_MAPWORD (sizeof(unsigned long) * 8)
#define MFNS_PER_FRAME (info->page_size / sizeof(unsigned long))
Index: makedumpfile-1.5.1.released/dwarf_info.c
===================================================================
--- makedumpfile-1.5.1.released.orig/dwarf_info.c
+++ makedumpfile-1.5.1.released/dwarf_info.c
@@ -324,6 +324,8 @@ get_data_member_location(Dwarf_Die *die,
return TRUE;
}
+int dwarf_formref(Dwarf_Attribute *, Dwarf_Off *);
+
static int
get_die_type(Dwarf_Die *die, Dwarf_Die *die_type)
{
Index: makedumpfile-1.5.1.released/print_info.c
===================================================================
--- makedumpfile-1.5.1.released.orig/print_info.c
+++ makedumpfile-1.5.1.released/print_info.c
@@ -244,6 +244,11 @@ print_usage(void)
MSG(" [-f]:\n");
MSG(" Overwrite DUMPFILE even if it already exists.\n");
MSG("\n");
+ MSG(" [-o]:\n");
+ MSG(" Read page structures from /proc/vmcore in the scan for\n");
+ MSG(" free and excluded pages regardless of whether\n");
+ MSG(" /proc/vmcore_pfn_lists is present.\n");
+ MSG("\n");
MSG(" [-h]:\n");
MSG(" Show help message and LZO/snappy support status (enabled/disabled).\n");
MSG("\n");
Index: makedumpfile-1.5.1.released/print_info.h
===================================================================
--- makedumpfile-1.5.1.released.orig/print_info.h
+++ makedumpfile-1.5.1.released/print_info.h
@@ -43,7 +43,8 @@ void print_execution_time(char *step_nam
*/
#define MIN_MSG_LEVEL (0)
#define MAX_MSG_LEVEL (31)
-#define DEFAULT_MSG_LEVEL (7) /* Print the progress indicator, the
+// cpw: was 7 but add x10 for testing
+#define DEFAULT_MSG_LEVEL (23) /* Print the progress indicator, the
common message, the error message */
#define ML_PRINT_PROGRESS (0x001) /* Print the progress indicator */
#define ML_PRINT_COMMON_MSG (0x002) /* Print the common message */
Index: makedumpfile-1.5.1.released/makedumpfile.c
===================================================================
--- makedumpfile-1.5.1.released.orig/makedumpfile.c
+++ makedumpfile-1.5.1.released/makedumpfile.c
@@ -13,6 +13,8 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
+#define _GNU_SOURCE
+#include <stdio.h>
#include "makedumpfile.h"
#include "print_info.h"
#include "dwarf_info.h"
@@ -31,6 +33,13 @@ struct srcfile_table srcfile_table;
struct vm_table vt = { 0 };
struct DumpInfo *info = NULL;
+int pfn_list_fd;
+struct pfn_element *pfn_list;
+int nflag = 0;
+int oflag = 0;
+int tflag = 0;
+struct timeval scan_start;
+int max_pfn_list;
char filename_stdout[] = FILENAME_STDOUT;
@@ -2415,6 +2424,22 @@ get_mm_sparsemem(void)
unsigned long long pfn_start, pfn_end;
unsigned long section, mem_map;
unsigned long *mem_sec = NULL;
+ unsigned long vaddr;
+ unsigned long paddr;
+ unsigned long lastvaddr;
+ unsigned long lastpaddr;
+ unsigned long diff;
+ long j;
+ int i;
+ int npfns;
+ int pagesize;
+ int num_mem_map;
+ int num_added = 0;
+ struct mem_map_data *mmd;
+ struct mem_map_data *curmmd;
+ struct mem_map_data *work1mmd;
+ struct mem_map_data *work2mmd;
+ struct mem_map_data *lastmmd;
int ret = FALSE;
@@ -2441,7 +2466,8 @@ get_mm_sparsemem(void)
}
info->num_mem_map = num_section;
if ((info->mem_map_data = (struct mem_map_data *)
- malloc(sizeof(struct mem_map_data)*info->num_mem_map)) == NULL) {
+ malloc(sizeof(struct mem_map_data) *
+ (EXTRA_MEMMAPS + info->num_mem_map))) == NULL) {
ERRMSG("Can't allocate memory for the mem_map_data. %s\n",
strerror(errno));
goto out;
@@ -2459,6 +2485,74 @@ get_mm_sparsemem(void)
dump_mem_map(pfn_start, pfn_end, mem_map, section_nr);
}
ret = TRUE;
+
+ /* add paddr to the table */
+ mmd = &info->mem_map_data[0];
+ num_mem_map = info->num_mem_map;
+ lastmmd = mmd + num_mem_map;
+ for (i = 0; i < num_mem_map; i++) {
+ if (mmd[i].mem_map == 0) {
+ mmd[i].paddr = 0;
+ } else {
+ mmd[i].paddr = vaddr_to_paddr(mmd[i].mem_map);
+ if (mmd[i].paddr == 0) {
+ printf("! can't translate %#lx to paddr\n",
+ mmd[i].mem_map);
+ exit(1);
+ }
+ /*
+ * When we pass a mem_map and its paddr to the kernel
+ * it will be ioremap'd assuming the entire range
+ * of pfn's are consecutive. If they are not then
+ * we need to split the range into two.
+ */
+ pagesize = SIZE(page);
+ npfns = mmd[i].pfn_end - mmd[i].pfn_start;
+ vaddr = (unsigned long)mmd[i].mem_map;
+ paddr = vaddr_to_paddr(vaddr);
+ diff = vaddr - paddr;
+ lastvaddr = vaddr + (pagesize * (npfns-1));
+ lastpaddr = vaddr_to_paddr(lastvaddr);
+ if (lastvaddr - lastpaddr != diff) {
+ /* there is a break in vtop somewhere in this range */
+ for (j = 0; j < npfns; j++) {
+ paddr = vaddr_to_paddr(vaddr);
+ if (vaddr - paddr != diff) {
+ diff = vaddr - paddr;
+ /* insert a new entry if we have room */
+ if (num_added < EXTRA_MEMMAPS) {
+ curmmd = &info->mem_map_data[i];
+ num_added++;
+ work1mmd = lastmmd - 1;
+ for (work2mmd = lastmmd;
+ work2mmd > curmmd; work2mmd--) {
+ work1mmd = work2mmd - 1;
+ *work2mmd = *work1mmd;
+ }
+ work2mmd = work1mmd + 1;
+ work1mmd->pfn_end =
+ work1mmd->pfn_start + j;
+ work2mmd->pfn_start =
+ work1mmd->pfn_end;
+ work2mmd->mem_map =
+ work1mmd->mem_map + (pagesize * j);
+ lastmmd++;
+ num_mem_map++;
+ info->num_mem_map++;
+ /*
+ * need only 1 split, the new
+ * one will be checked also.
+ */
+ break;
+ } else
+ printf("warn: out of EXTRA_MEMMAPS\n");
+ }
+ vaddr += pagesize;
+ }
+ }
+ }
+ }
+
out:
if (mem_sec != NULL)
free(mem_sec);
@@ -2571,6 +2665,105 @@ initialize_bitmap_memory(void)
return TRUE;
}
+/*
+ * construct a version of the mem_map_data table to pass to the kernel
+ */
+void *
+make_kernel_mmap(int *kmap_elements, int *kmap_size)
+{
+ int i, j;
+ int elements = 0;
+ int page_structs;
+ int elem;
+ unsigned long base_end_pfn;
+ unsigned long end_paddr;
+ struct mem_map_data *mmdo, *mmdn;
+ struct mem_map_data *mmdbase, *mmdnext, *mmdend, *mmdwork;
+ struct mem_map_data temp_mmd;
+ struct mem_map_data *mmap;
+
+ mmap = malloc(info->num_mem_map * sizeof(struct mem_map_data));
+ if (mmap == NULL) {
+ ERRMSG("Can't allocate memory kernel map\n");
+ return NULL;
+ }
+
+ /* condense them down to the valid ones */
+ for (i = 0, mmdn = mmap, mmdo = &info->mem_map_data[0];
+ i < info->num_mem_map; i++, mmdo++) {
+ if (mmdo->mem_map && mmdo->paddr) {
+ *mmdn = *mmdo;
+ mmdn++;
+ elements++;
+ }
+ }
+
+ /* make sure it is sorted by mem_map (it should be already) */
+ mmdn = mmap;
+ for (i = 0; i < elements - 1; i++) {
+ for (j = i + 1; j < elements; j++) {
+ if (mmdn[j].mem_map < mmdn[i].mem_map) {
+ temp_mmd = mmdn[j];
+ mmdn[j] = mmdn[i];
+ mmdn[i] = temp_mmd;
+ }
+ }
+ }
+
+ /*
+ * consolidate those mem_map's with occupying consecutive physical
+ * addresses
+ * pages represented by these pages structs: addr of page struct
+ * pfns 0x1000000-1008000 mem_map 0xffffea0038000000 paddr 0x11f7e00000
+ * pfns 0x1008000-1010000 mem_map 0xffffea00381c0000 paddr 0x11f7fc0000
+ * pfns 0x1010000-1018000 mem_map 0xffffea0038380000 paddr 0x11f8180000
+ * 8000 increments inc's: 1c0000
+ * 8000000 of memory (128M) 8000 page structs
+ *
+ */
+ mmdbase = mmap;
+ mmdnext = mmap + 1;
+ mmdend = mmap + elements;
+ while (mmdnext < mmdend) {
+ elem = mmdend - mmdnext;
+ /* test mmdbase vs. mmdwork and onward: */
+ for (i = 0, mmdwork = mmdnext; i < elem; i++, mmdwork++) {
+ base_end_pfn = mmdbase->pfn_end;
+ if (base_end_pfn == mmdwork->pfn_start) {
+ page_structs = (mmdbase->pfn_end -
+ mmdbase->pfn_start);
+ end_paddr = (page_structs * SIZE(page))
+ + mmdbase->paddr;
+ if (mmdwork->paddr == end_paddr) {
+ /* extend base by the work one */
+ mmdbase->pfn_end = mmdwork->pfn_end;
+ /* next is where to begin next time */
+ mmdnext = mmdwork + 1;
+ } else {
+ /* gap in address of page
+ structs; end of section */
+ mmdbase++;
+ if (mmdwork - mmdbase > 0)
+ *mmdbase = *mmdwork;
+ mmdnext = mmdwork + 1;
+ break;
+ }
+ } else {
+ /* gap in pfns; end of section */
+ mmdbase++;
+ if (mmdwork - mmdbase > 0)
+ *mmdbase = *mmdwork;
+ mmdnext = mmdwork + 1;
+ break;
+ }
+ }
+ }
+ elements = (mmdbase - mmap) + 1;
+ *kmap_elements = elements;
+ *kmap_size = elements * sizeof(struct mem_map_data);
+ return mmap;
+}
+
int
initial(void)
{
@@ -2833,7 +3026,19 @@ out:
if (!get_value_for_old_linux())
return FALSE;
+ /*
+ * page_is_buddy will tell us whether free pages can be identified
+ * by flags and counts in the page structure without making an extra
+ * pass through the free lists.
+ * This is applicable to using /proc/vmcore or using the kernel.
+ * force all old (-o) forms to search free lists
+ */
+/*
if (info->flag_cyclic && (info->dump_level & DL_EXCLUDE_FREE))
+ if ((info->flag_cyclic || !oflag) &&
+ (info->dump_level & DL_EXCLUDE_FREE))
+*/
+ if (info->dump_level & DL_EXCLUDE_FREE)
setup_page_is_buddy();
return TRUE;
@@ -3549,6 +3754,65 @@ out:
return ret;
}
+/*
+ * let the kernel find excludable pages from one node
+ */
+void
+__exclude_free_pages_kernel(unsigned long pgdat, int node)
+{
+ int i, j, ret, pages;
+ unsigned long pgdat_paddr;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+ struct pfn_element *pe;
+
+ if ((pgdat_paddr = vaddr_to_paddr(pgdat)) == NOT_PADDR) {
+ ERRMSG("Can't convert virtual address(%#lx) to physical.\n",
+ pgdat);
+ return;
+ }
+
+ /*
+ * Get the list of free pages.
+ * This may be broken up into MAX_PFN_list arrays of PFNs.
+ */
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_FREE;
+ request.node = node;
+ request.pgdat_paddr = pgdat_paddr;
+ request.pgdat_vaddr = pgdat;
+ request.reply_ptr = (void *)&reply;
+ request.pfn_list_ptr = (void *)pfn_list;
+ memset(&reply, 0, sizeof(reply));
+
+ do {
+ request.more = 0;
+ if (reply.more) {
+ /* this is to be a continuation of the last request */
+ request.more = 1;
+ request.zone_index = reply.zone_index;
+ request.freearea_index = reply.freearea_index;
+ request.type_index = reply.type_index;
+ request.list_ct = reply.list_ct;
+ }
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret != sizeof(request)) {
+ printf("PL_REQUEST_FREE failed\n");
+ return;
+ }
+ pfn_free += reply.pfn_free;
+
+ for (i = 0; i < reply.in_pfn_list; i++) {
+ pe = &pfn_list[i];
+ pages = (1 << pe->order);
+ for (j = 0; j < pages; j++) {
+ clear_bit_on_2nd_bitmap_for_kernel(pe->pfn + j);
+ }
+ }
+ } while (reply.more);
+
+ return;
+}
int
_exclude_free_page(void)
@@ -3556,6 +3820,7 @@ _exclude_free_page(void)
int i, nr_zones, num_nodes, node;
unsigned long node_zones, zone, spanned_pages, pgdat;
struct timeval tv_start;
+int ct=0;
if ((node = next_online_node(0)) < 0) {
ERRMSG("Can't get next online node.\n");
@@ -3568,7 +3833,24 @@ _exclude_free_page(void)
gettimeofday(&tv_start, NULL);
for (num_nodes = 1; num_nodes <= vt.numnodes; num_nodes++) {
-
+ if (!info->flag_cyclic && info->flag_use_kernel_lists) {
+ node_zones = pgdat + OFFSET(pglist_data.node_zones);
+ if (!readmem(VADDR,
+ pgdat + OFFSET(pglist_data.nr_zones),
+ &nr_zones, sizeof(nr_zones))) {
+ ERRMSG("Can't get nr_zones.\n");
+ return FALSE;
+ }
+ print_progress(PROGRESS_FREE_PAGES, num_nodes - 1,
+ vt.numnodes);
+ /* ask the kernel to do one node */
+ __exclude_free_pages_kernel(pgdat, node);
+ goto next_pgdat;
+ }
+ /*
+ * kernel does not have the pfn_list capability
+ * use the old way
+ */
print_progress(PROGRESS_FREE_PAGES, num_nodes - 1, vt.numnodes);
node_zones = pgdat + OFFSET(pglist_data.node_zones);
@@ -3592,9 +3874,11 @@ _exclude_free_page(void)
}
if (!spanned_pages)
continue;
+ct++;
if (!reset_bitmap_of_free_pages(zone))
return FALSE;
}
+ next_pgdat:
if (num_nodes < vt.numnodes) {
if ((node = next_online_node(node + 1)) < 0) {
ERRMSG("Can't get next online node.\n");
@@ -3612,6 +3896,8 @@ _exclude_free_page(void)
*/
print_progress(PROGRESS_FREE_PAGES, vt.numnodes, vt.numnodes);
print_execution_time(PROGRESS_FREE_PAGES, &tv_start);
+ if (tflag)
+ print_execution_time("Total time", &scan_start);
return TRUE;
}
@@ -3755,7 +4041,6 @@ setup_page_is_buddy(void)
}
} else
info->page_is_buddy = page_is_buddy_v2;
-
out:
if (!info->page_is_buddy)
DEBUG_MSG("Can't select page_is_buddy handler; "
@@ -3964,10 +4249,88 @@ exclude_zero_pages(void)
return TRUE;
}
+/*
+ * let the kernel find excludable pages from one mem_section
+ */
+int
+__exclude_unnecessary_pages_kernel(int mm, struct mem_map_data *mmd)
+{
+ unsigned long long pfn_start = mmd->pfn_start;
+ unsigned long long pfn_end = mmd->pfn_end;
+ int i, j, ret, pages, flag;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+ struct pfn_element *pe;
+
+ /*
+ * Get the list of to-be-excluded pages in this section.
+ * It may be broken up by groups of max_pfn_list size.
+ */
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_EXCLUDE;
+ request.paddr = mmd->paddr; /* phys addr of mem_map */
+ request.reply_ptr = (void *)&reply;
+ request.pfn_list_ptr = (void *)pfn_list;
+ request.exclude_bits = 0;
+ request.pfn_start = pfn_start;
+ request.count = pfn_end - pfn_start;
+ if (info->dump_level & DL_EXCLUDE_CACHE)
+ request.exclude_bits |= DL_EXCLUDE_CACHE;
+ if (info->dump_level & DL_EXCLUDE_CACHE_PRI)
+ request.exclude_bits |= DL_EXCLUDE_CACHE_PRI;
+ if (info->dump_level & DL_EXCLUDE_USER_DATA)
+ request.exclude_bits |= DL_EXCLUDE_USER_DATA;
+ /* if we try for free pages from the freelists then we don't need
+ to ask here for 'buddy' pages */
+ if (info->dump_level & DL_EXCLUDE_FREE)
+ request.exclude_bits |= DL_EXCLUDE_FREE;
+ memset(&reply, 0, sizeof(reply));
+
+ do {
+ /* pfn represented by paddr */
+ request.more = 0;
+ if (reply.more) {
+ /* this is to be a continuation of the last request */
+ request.more = 1;
+ request.map_index = reply.map_index;
+ }
+
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret != sizeof(request))
+ return FALSE;
+
+ pfn_cache += reply.pfn_cache;
+ pfn_cache_private += reply.pfn_cache_private;
+ pfn_user += reply.pfn_user;
+ pfn_free += reply.pfn_free;
+
+ flag = 0;
+ for (i = 0; i < reply.in_pfn_list; i++) {
+ pe = &pfn_list[i];
+ pages = (1 << pe->order);
+ for (j = 0; j < pages; j++) {
+ if (clear_bit_on_2nd_bitmap_for_kernel(
+ pe->pfn + j) == FALSE) {
+ printf("fail: mm %d slot %d pfn %#lx\n",
+ mm, i, pe->pfn + j);
+ printf("paddr %#llx pfn %#llx-%#llx mem_map %#lx\n", mmd->paddr, mmd->pfn_start, mmd->pfn_end, mmd->mem_map);
+ flag = 1;
+ break;
+ }
+ if (flag) break;
+ }
+ }
+ } while (reply.more);
+
+ return TRUE;
+}
+
int
-__exclude_unnecessary_pages(unsigned long mem_map,
- unsigned long long pfn_start, unsigned long long pfn_end)
+__exclude_unnecessary_pages(int mm, struct mem_map_data *mmd)
{
+ unsigned long long pfn_start = mmd->pfn_start;
+ unsigned long long pfn_end = mmd->pfn_end;
+ unsigned long mem_map = mmd->mem_map;
unsigned long long pfn, pfn_mm, maddr;
unsigned long long pfn_read_start, pfn_read_end, index_pg;
unsigned char page_cache[SIZE(page) * PGMM_CACHED];
@@ -3975,6 +4338,12 @@ __exclude_unnecessary_pages(unsigned lon
unsigned int _count, _mapcount = 0;
unsigned long flags, mapping, private = 0;
+ if (info->flag_use_kernel_lists) {
+ if (__exclude_unnecessary_pages_kernel(mm, mmd) == FALSE)
+ return FALSE;
+ return TRUE;
+ }
+
/*
* Refresh the buffer of struct page, when changing mem_map.
*/
@@ -4012,7 +4381,6 @@ __exclude_unnecessary_pages(unsigned lon
pfn_mm = PGMM_CACHED - index_pg;
else
pfn_mm = pfn_end - pfn;
-
if (!readmem(VADDR, mem_map,
page_cache + (index_pg * SIZE(page)),
SIZE(page) * pfn_mm)) {
@@ -4036,7 +4404,6 @@ __exclude_unnecessary_pages(unsigned lon
* Exclude the free page managed by a buddy
*/
if ((info->dump_level & DL_EXCLUDE_FREE)
- && info->flag_cyclic
&& info->page_is_buddy
&& info->page_is_buddy(flags, _mapcount, private, _count)) {
int i;
@@ -4085,19 +4452,78 @@ __exclude_unnecessary_pages(unsigned lon
return TRUE;
}
+/*
+ * Pass in the mem_map_data table.
+ * Must do this once, and before doing PL_REQUEST_FREE or PL_REQUEST_EXCLUDE.
+ */
+int
+setup_kernel_mmap()
+{
+ int ret;
+ int kmap_elements, kmap_size;
+ long malloc_size;
+ void *kmap_addr;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+
+ kmap_addr = make_kernel_mmap(&kmap_elements, &kmap_size);
+ if (kmap_addr == NULL)
+ return FALSE;
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_MEMMAP;
+ request.map_ptr = kmap_addr;
+ request.reply_ptr = (void *)&reply;
+ request.map_count = kmap_elements;
+ request.map_size = kmap_size;
+ request.list_size = MAX_PFN_LIST;
+
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret < 0) {
+ fprintf(stderr, "PL_REQUEST_MEMMAP returned %d\n", ret);
+ return FALSE;
+ }
+ /* the reply tells us how long the kernel's list actually is */
+ max_pfn_list = reply.pfn_list_elements;
+ if (max_pfn_list <= 0) {
+ fprintf(stderr,
+ "PL_REQUEST_MEMMAP returned max_pfn_list %d\n",
+ max_pfn_list);
+ return FALSE;
+ }
+ if (max_pfn_list < MAX_PFN_LIST) {
+ printf("length of pfn list dropped from %d to %d\n",
+ MAX_PFN_LIST, max_pfn_list);
+ }
+ free(kmap_addr);
+ /*
+ * Allocate the buffer for the PFN list (just once).
+ */
+ malloc_size = max_pfn_list * sizeof(struct pfn_element);
+ if ((pfn_list = (struct pfn_element *)malloc(malloc_size)) == NULL) {
+ ERRMSG("Can't allocate pfn_list of %ld\n", malloc_size);
+ return FALSE;
+ }
+ return TRUE;
+}
+
int
exclude_unnecessary_pages(void)
{
- unsigned int mm;
- struct mem_map_data *mmd;
- struct timeval tv_start;
+ unsigned int mm;
+ struct mem_map_data *mmd;
+ struct timeval tv_start;
if (is_xen_memory() && !info->dom0_mapnr) {
ERRMSG("Can't get max domain-0 PFN for excluding pages.\n");
return FALSE;
}
+ if (!info->flag_cyclic && info->flag_use_kernel_lists) {
+ if (setup_kernel_mmap() == FALSE)
+ return FALSE;
+ }
gettimeofday(&tv_start, NULL);
+ gettimeofday(&scan_start, NULL);
for (mm = 0; mm < info->num_mem_map; mm++) {
print_progress(PROGRESS_UNN_PAGES, mm, info->num_mem_map);
@@ -4106,9 +4532,9 @@ exclude_unnecessary_pages(void)
if (mmd->mem_map == NOT_MEMMAP_ADDR)
continue;
-
- if (!__exclude_unnecessary_pages(mmd->mem_map,
- mmd->pfn_start, mmd->pfn_end))
+ if (mmd->paddr == 0)
+ continue;
+ if (!__exclude_unnecessary_pages(mm, mmd))
return FALSE;
}
@@ -4139,7 +4565,11 @@ exclude_unnecessary_pages_cyclic(void)
*/
copy_bitmap_cyclic();
- if ((info->dump_level & DL_EXCLUDE_FREE) && !info->page_is_buddy)
+ /*
+ * If free pages cannot be identified with the buddy flag and/or
+ * count then we have to search free lists.
+ */
+ if ((info->dump_level & DL_EXCLUDE_FREE) && (!info->page_is_buddy))
if (!exclude_free_page())
return FALSE;
@@ -4164,8 +4594,7 @@ exclude_unnecessary_pages_cyclic(void)
if (mmd->pfn_end >= info->cyclic_start_pfn &&
mmd->pfn_start <= info->cyclic_end_pfn) {
- if (!__exclude_unnecessary_pages(mmd->mem_map,
- mmd->pfn_start, mmd->pfn_end))
+ if (!__exclude_unnecessary_pages(mm, mmd))
return FALSE;
}
}
@@ -4195,7 +4624,7 @@ update_cyclic_region(unsigned long long
if (!create_1st_bitmap_cyclic())
return FALSE;
- if (!exclude_unnecessary_pages_cyclic())
+ if (exclude_unnecessary_pages_cyclic() == FALSE)
return FALSE;
return TRUE;
@@ -4255,7 +4684,7 @@ create_2nd_bitmap(void)
if (info->dump_level & DL_EXCLUDE_CACHE ||
info->dump_level & DL_EXCLUDE_CACHE_PRI ||
info->dump_level & DL_EXCLUDE_USER_DATA) {
- if (!exclude_unnecessary_pages()) {
+ if (exclude_unnecessary_pages() == FALSE) {
ERRMSG("Can't exclude unnecessary pages.\n");
return FALSE;
}
@@ -4263,8 +4692,10 @@ create_2nd_bitmap(void)
/*
* Exclude free pages.
+ * If free pages cannot be identified with the buddy flag and/or
+ * count then we have to search free lists.
*/
- if (info->dump_level & DL_EXCLUDE_FREE)
+ if ((info->dump_level & DL_EXCLUDE_FREE) && (!info->page_is_buddy))
if (!exclude_free_page())
return FALSE;
@@ -4395,6 +4826,10 @@ create_dump_bitmap(void)
int ret = FALSE;
if (info->flag_cyclic) {
+ if (info->flag_use_kernel_lists) {
+ if (setup_kernel_mmap() == FALSE)
+ goto out;
+ }
if (!prepare_bitmap_buffer_cyclic())
goto out;
@@ -4872,6 +5307,7 @@ get_num_dumpable_cyclic(void)
{
unsigned long long pfn, num_dumpable=0;
+ gettimeofday(&scan_start, NULL);
for (pfn = 0; pfn < info->max_mapnr; pfn++) {
if (!update_cyclic_region(pfn))
return FALSE;
@@ -5201,7 +5637,7 @@ get_loads_dumpfile_cyclic(void)
info->cyclic_end_pfn = info->pfn_cyclic;
if (!create_1st_bitmap_cyclic())
return FALSE;
- if (!exclude_unnecessary_pages_cyclic())
+ if (exclude_unnecessary_pages_cyclic() == FALSE)
return FALSE;
if (!(phnum = get_phnum_memory()))
@@ -5613,6 +6049,10 @@ write_kdump_pages(struct cache_data *cd_
pfn_zero++;
continue;
}
+
+ if (nflag)
+ continue;
+
/*
* Compress the page data.
*/
@@ -5768,6 +6208,7 @@ write_kdump_pages_cyclic(struct cache_da
for (pfn = start_pfn; pfn < end_pfn; pfn++) {
if ((num_dumped % per) == 0)
+
print_progress(PROGRESS_COPY, num_dumped, info->num_dumpable);
/*
@@ -5786,11 +6227,17 @@ write_kdump_pages_cyclic(struct cache_da
*/
if ((info->dump_level & DL_EXCLUDE_ZERO)
&& is_zero_page(buf, info->page_size)) {
+if (!nflag) {
if (!write_cache(cd_header, pd_zero, sizeof(page_desc_t)))
goto out;
+}
pfn_zero++;
continue;
}
+
+ if (nflag)
+ continue;
+
/*
* Compress the page data.
*/
@@ -6208,6 +6655,8 @@ write_kdump_pages_and_bitmap_cyclic(stru
if (!update_cyclic_region(pfn))
return FALSE;
+ if (tflag)
+ print_execution_time("Total time", &scan_start);
if (!write_kdump_pages_cyclic(cd_header, cd_page, &pd_zero, &offset_data))
return FALSE;
@@ -8231,6 +8680,22 @@ static struct option longopts[] = {
{0, 0, 0, 0}
};
+/*
+ * test for the presence of capability in the kernel to provide lists
+ * of pfn's:
+ * /proc/vmcore_pfn_lists
+ * return 1 for present
+ * return 0 for not present
+ */
+int
+test_kernel_pfn_lists(void)
+{
+ if ((pfn_list_fd = open("/proc/vmcore_pfn_lists", O_WRONLY)) < 0) {
+ return 0;
+ }
+ return 1;
+}
+
int
main(int argc, char *argv[])
{
@@ -8256,7 +8721,7 @@ main(int argc, char *argv[])
info->block_order = DEFAULT_ORDER;
message_level = DEFAULT_MSG_LEVEL;
- while ((opt = getopt_long(argc, argv, "b:cDd:EFfg:hi:lMpRrsvXx:", longopts,
+ while ((opt = getopt_long(argc, argv, "b:cDd:EFfg:hi:MnoRrstVvXx:Y", longopts,
NULL)) != -1) {
switch (opt) {
case 'b':
@@ -8314,6 +8779,13 @@ main(int argc, char *argv[])
case 'M':
info->flag_dmesg = 1;
break;
+ case 'n':
+ /* -n undocumented, for testing page scanning time */
+ nflag = 1;
+ break;
+ case 'o':
+ oflag = 1;
+ break;
case 'p':
info->flag_compress = DUMP_DH_COMPRESSED_SNAPPY;
break;
@@ -8329,6 +8801,9 @@ main(int argc, char *argv[])
case 'r':
info->flag_reassemble = 1;
break;
+ case 't':
+ tflag = 1;
+ break;
case 'V':
info->vaddr_for_vtop = strtoul(optarg, NULL, 0);
break;
@@ -8360,6 +8835,12 @@ main(int argc, char *argv[])
goto out;
}
}
+
+ if (oflag)
+ info->flag_use_kernel_lists = 0;
+ else
+ info->flag_use_kernel_lists = test_kernel_pfn_lists();
+
if (flag_debug)
message_level |= ML_PRINT_DEBUG_MSG;
[-- Attachment #3: 121207.vmcore_pagescans.sles --]
[-- Type: text/plain, Size: 21973 bytes --]
To: kumagai-atsushi@mxc.nes.nec.co.jp d.hatayama@jp.fujitsu.com
Cc: kexec@lists.infradead.org
Subject: [PATCH] scan page tables for makedumpfile, 3.0.13 kernel
From: Cliff Wickman <cpw@sgi.com>
This patch provides the kernel support for makedumpfile to request
a list of PFNs.
Accompanies
[PATCH v2] makedumpfile: request the kernel do page scans
---
fs/proc/vmcore.c | 571 +++++++++++++++++++++++++++++++++++++++++++
include/linux/makedumpfile.h | 115 ++++++++
2 files changed, 686 insertions(+)
Index: linux/fs/proc/vmcore.c
===================================================================
--- linux.orig/fs/proc/vmcore.c
+++ linux/fs/proc/vmcore.c
@@ -18,8 +18,18 @@
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/list.h>
+#include <linux/makedumpfile.h>
+#include <linux/mmzone.h>
#include <asm/uaccess.h>
#include <asm/io.h>
+#include <asm/page.h>
+static int num_mem_map_data = 0;
+static struct mem_map_data *mem_map_data;
+static struct pfn_element *pfn_list;
+static long in_pfn_list;
+static int last_found_vaddr = 0;
+static int last_found_paddr = 0;
+static int max_pfn_list;
/* List representing chunks of contiguous memory areas and their offsets in
* vmcore file.
@@ -34,6 +44,7 @@ static size_t elfcorebuf_sz;
static u64 vmcore_size;
static struct proc_dir_entry *proc_vmcore = NULL;
+static struct proc_dir_entry *proc_vmcore_pfn_lists = NULL;
/*
* Returns > 0 for RAM pages, 0 for non-RAM pages, < 0 on error
@@ -207,11 +218,567 @@ static ssize_t read_vmcore(struct file *
return acc;
}
+/*
+ * Given the boot-kernel-relative virtual address of a page
+ * return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+unsigned long
+find_local_vaddr(unsigned long orig_vaddr)
+{
+ int i;
+ int fnd = 0;
+ struct mem_map_data *mmd, *next_mmd;
+ unsigned long paddr;
+ unsigned long local_vaddr;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_vaddr, mmd = mem_map_data + last_found_vaddr,
+ next_mmd = mem_map_data + last_found_vaddr + 1;
+ i < num_mem_map_data; i++, mmd++, next_mmd++) {
+ if (mmd->mem_map && mmd->paddr) {
+ if (orig_vaddr >= mmd->mem_map &&
+ orig_vaddr < next_mmd->mem_map) {
+ offset = orig_vaddr - mmd->mem_map;
+ paddr = mmd->paddr + offset;
+ fnd++;
+ /* caching gives about 99% hit on first pass */
+ last_found_vaddr = i;
+ break;
+ }
+ }
+ }
+
+ if (! fnd) {
+ if (last_found_vaddr > 0) {
+ last_found_vaddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+ }
+
+ /* paddr is now the physical address of the page structure */
+ /* and offset is the offset into the found section, and we have
+ a table of how those sections are ioremap_cache'd */
+ local_vaddr = (unsigned long)mmd->section_vaddr + offset;
+ return local_vaddr;
+}
+
+/*
+ * Given a paddr, return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+void *
+find_local_from_paddr(unsigned long paddr)
+{
+ int i;
+ struct mem_map_data *mmd;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_paddr, mmd = mem_map_data + last_found_paddr;
+ i < num_mem_map_data; i++, mmd++) {
+ if ((paddr >= mmd->paddr) && (paddr < mmd->ending_paddr)) {
+ offset = paddr - mmd->paddr;
+ last_found_paddr = i;
+ /* caching gives about 98% hit on first pass */
+ return (void *)(mmd->section_vaddr + offset);
+ }
+ }
+
+ if (last_found_paddr > 0) {
+ last_found_paddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+}
+
+/*
+ * given an anchoring list_head, walk the list of free pages
+ * 'root' is a virtual address based on the ioremap_cache'd pointer pgp
+ * 'boot_root' is the virtual address of the list root, boot kernel relative
+ *
+ * return the number of pages found on the list
+ */
+int
+walk_freelist(struct list_head *root, int node, int zone, int order, int list,
+ int restart_list, int start_page, struct pfn_list_request *reqp,
+ struct pfn_reply *replyp, struct list_head *boot_root)
+{
+ int list_ct = 0;
+ int list_free_pages = 0;
+ int doit;
+ unsigned long start_pfn;
+ struct page *pagep;
+ struct page *local_pagep;
+ struct list_head *lhp;
+ struct list_head *local_lhp; /* crashkernel-relative */
+ struct list_head *prev;
+ struct pfn_element *pe;
+
+ /*
+ * root is the crashkernel-relative address of the anchor of the
+ * free_list.
+ */
+ prev = root;
+ if (root == NULL) {
+ printk(KERN_EMERG "root is null!!, node %d order %d\n",
+ node, order);
+ return 0;
+ }
+
+ if (root->next == boot_root)
+ /* list is empty */
+ return 0;
+
+ lhp = root->next;
+ local_lhp = (struct list_head *)find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp) {
+ return 0;
+ }
+
+ while (local_lhp != boot_root) {
+ list_ct++;
+ if (lhp == NULL) {
+ printk(KERN_EMERG
+ "The free list has a null!!, node %d order %d\n",
+ node, order);
+ break;
+ }
+ if (list_ct > 1 && local_lhp->prev != prev) {
+ /* can't be compared to root, as that is local */
+ printk(KERN_EMERG "The free list is broken!!\n");
+ break;
+ }
+
+ /* we want the boot kernel's pfn that this page represents */
+ pagep = container_of((struct list_head *)lhp,
+ struct page, lru);
+ start_pfn = pagep - vmemmap;
+ local_pagep = container_of((struct list_head *)local_lhp,
+ struct page, lru);
+ doit = 1;
+ if (restart_list && list_ct < start_page)
+ doit = 0;
+ if (doit) {
+ if (in_pfn_list == max_pfn_list) {
+ /* if array would overflow, come back to
+ this page with a continuation */
+ replyp->more = 1;
+ replyp->zone_index = zone;
+ replyp->freearea_index = order;
+ replyp->type_index = list;
+ replyp->list_ct = list_ct;
+ goto list_is_full;
+ }
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = start_pfn;
+ pe->order = order;
+ list_free_pages += (1 << order);
+ }
+ prev = lhp;
+ lhp = local_pagep->lru.next;
+ /* the local node-relative vaddr: */
+ local_lhp = (struct list_head *)
+ find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp)
+ break;
+ }
+
+list_is_full:
+ return list_free_pages;
+}
+
+/*
+ * Return the pfns of free pages on this node
+ */
+int
+write_vmcore_get_free(struct pfn_list_request *reqp)
+{
+ int node;
+ int nr_zones;
+ int nr_orders = MAX_ORDER;
+ int nr_freelist = MIGRATE_TYPES;
+ int zone;
+ int order;
+ int list;
+ int start_zone = 0;
+ int start_order = 0;
+ int start_list = 0;
+ int ret;
+ int restart = 0;
+ int start_page = 0;
+ int node_free_pages = 0;
+ struct pfn_reply rep;
+ struct pglist_data *pgp;
+ struct zone *zonep;
+ struct free_area *fap;
+ struct list_head *flp;
+ struct list_head *boot_root;
+ unsigned long pgdat_paddr;
+ unsigned long pgdat_vaddr;
+ unsigned long page_aligned_pgdat;
+ unsigned long page_aligned_size;
+ void *mapped_vaddr;
+
+ node = reqp->node;
+ pgdat_paddr = reqp->pgdat_paddr;
+ pgdat_vaddr = reqp->pgdat_vaddr;
+
+ /* map this pglist_data structure within a page-aligned area */
+ page_aligned_pgdat = pgdat_paddr & ~(PAGE_SIZE - 1);
+ page_aligned_size = sizeof(struct pglist_data) +
+ (pgdat_paddr - page_aligned_pgdat);
+ page_aligned_size = ((page_aligned_size + (PAGE_SIZE - 1))
+ >> PAGE_SHIFT) << PAGE_SHIFT;
+ mapped_vaddr = ioremap_cache(page_aligned_pgdat, page_aligned_size);
+ if (!mapped_vaddr) {
+ printk("ioremap_cache of pgdat %#lx failed\n",
+ page_aligned_pgdat);
+ return -EINVAL;
+ }
+ pgp = (struct pglist_data *)(mapped_vaddr +
+ (pgdat_paddr - page_aligned_pgdat));
+ nr_zones = pgp->nr_zones;
+ memset(&rep, 0, sizeof(rep));
+
+ if (reqp->more) {
+ restart = 1;
+ start_zone = reqp->zone_index;
+ start_order = reqp->freearea_index;
+ start_list = reqp->type_index;
+ start_page = reqp->list_ct;
+ }
+
+ in_pfn_list = 0;
+ for (zone = start_zone; zone < nr_zones; zone++) {
+ zonep = &pgp->node_zones[zone];
+ for (order = start_order; order < nr_orders; order++) {
+ fap = &zonep->free_area[order];
+ /* some free_area's are all zero */
+ if (fap->nr_free) {
+ for (list = start_list; list < nr_freelist;
+ list++) {
+ flp = &fap->free_list[list];
+ boot_root = (struct list_head *)
+ (pgdat_vaddr +
+ ((unsigned long)flp -
+ (unsigned long)pgp));
+ ret = walk_freelist(flp, node, zone,
+ order, list, restart,
+ start_page, reqp, &rep,
+ boot_root);
+ node_free_pages += ret;
+ restart = 0;
+ if (rep.more)
+ goto list_full;
+ }
+ }
+ }
+ }
+list_full:
+
+ iounmap(mapped_vaddr);
+
+ /* copy the reply and the valid part of our pfn list to the user */
+ rep.pfn_free = node_free_pages; /* the total, for statistics */
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+/*
+ * Get the memap_data table from makedumpfile
+ * and do the single allocate of the pfn_list.
+ */
+int
+write_vmcore_get_memmap(struct pfn_list_request *reqp)
+{
+ int i;
+ int count;
+ int size;
+ int ret = 0;
+ long pfn_list_elements;
+ long malloc_size;
+ unsigned long page_section_start;
+ unsigned long page_section_size;
+ struct mem_map_data *mmd, *dum_mmd;
+ struct pfn_reply rep;
+ void *bufptr;
+
+ rep.pfn_list_elements = 0;
+ if (num_mem_map_data) {
+ /* shouldn't have been done before, but if it was.. */
+ printk(KERN_INFO "warning: PL_REQUEST_MEMMAP is repeated\n");
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data;
+ i++, mmd++) {
+ iounmap(mmd->section_vaddr);
+ }
+ kfree(mem_map_data);
+ mem_map_data = NULL;
+ num_mem_map_data = 0;
+ kfree(pfn_list);
+ pfn_list = NULL;
+ }
+
+ count = reqp->map_count;
+ size = reqp->map_size;
+ bufptr = reqp->map_ptr;
+ if (size != (count * sizeof(struct mem_map_data))) {
+ printk("Error in mem_map_data, %d * %ld != %d\n",
+ count, sizeof(struct mem_map_data), size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* add a dummy at the end to limit the size of the last entry */
+ size += sizeof(struct mem_map_data);
+
+ mem_map_data = kzalloc(size, GFP_KERNEL);
+ if (!mem_map_data) {
+ printk("kmalloc of mem_map_data for %d failed\n", size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (copy_from_user(mem_map_data, bufptr, size)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ num_mem_map_data = count;
+
+ /* construct the dummy entry to limit the size of 'next_mmd->mem_map' */
+ /* (see find_local_vaddr() ) */
+ mmd = mem_map_data + (num_mem_map_data - 1);
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ dum_mmd = mmd + 1;
+ *dum_mmd = *mmd;
+ dum_mmd->mem_map += page_section_size;
+
+ /* Fill in the ending address of array of page struct */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ mmd->ending_paddr = mmd->paddr +
+ ((mmd->pfn_end - mmd->pfn_start) * sizeof(struct page));
+ }
+
+ /* Map each section of page structures to local virtual addresses */
+ /* (these are never iounmap'd, as this is the crash kernel) */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ page_section_start = mmd->paddr;
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ mmd->section_vaddr = ioremap_cache(page_section_start,
+ page_section_size);
+ if (!mmd->section_vaddr) {
+ printk(
+ "ioremap_cache of [%d] node %#lx for %#lx failed\n",
+ i, page_section_start, page_section_size);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ /*
+ * allocate the array for PFN's (just once)
+ * get as much as we can, up to what the user specified, and return
+ * that count to the user
+ */
+ pfn_list_elements = reqp->list_size;
+ do {
+ malloc_size = pfn_list_elements * sizeof(struct pfn_element);
+ if ((pfn_list = kmalloc(malloc_size, GFP_KERNEL)) != NULL) {
+ rep.pfn_list_elements = pfn_list_elements;
+ max_pfn_list = pfn_list_elements;
+ goto out;
+ }
+ pfn_list_elements -= 1000;
+ } while (pfn_list == NULL && pfn_list_elements > 0);
+
+ ret = -EINVAL;
+out:
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ return ret;
+}
+
+/*
+ * Return the pfns of to-be-excluded pages fulfilling this request.
+ * This is called for each mem_map in makedumpfile's list.
+ */
+int
+write_vmcore_get_excludes(struct pfn_list_request *reqp)
+{
+ int i;
+ int start = 0;
+ int end;
+ unsigned long paddr;
+ unsigned long pfn;
+ void *vaddr;
+ struct page *pagep;
+ struct pfn_reply rep;
+ struct pfn_element *pe;
+
+ if (!num_mem_map_data) {
+ /* sanity check */
+ printk(
+ "ERROR:PL_REQUEST_MEMMAP not done before PL_REQUEST_EXCLUDE\n");
+ return -EINVAL;
+ }
+
+ /*
+ * the request contains (besides request type and bufptr):
+ * paddr (physical address of the page[0]
+ * count of pages in the block
+ * exclude bits (DL_EXCLUDE_...)
+ */
+ paddr = reqp->paddr;
+ end = reqp->count;
+ pfn = reqp->pfn_start;
+ /* find the already-mapped vaddr of this paddr */
+ vaddr = find_local_from_paddr(paddr);
+ if (!vaddr) {
+ printk("ERROR: PL_REQUEST_EXCLUDE cannot find paddr %#lx\n",
+ paddr);
+ return -EINVAL;
+ }
+ if (reqp->more) {
+ start = reqp->map_index;
+ vaddr += (reqp->map_index * sizeof(struct page));
+ pfn += reqp->map_index;
+ }
+ memset(&rep, 0, sizeof(rep));
+ in_pfn_list = 0;
+
+ for (i = start, pagep = (struct page *)vaddr; i < end;
+ i++, pagep++, pfn++) {
+ if (in_pfn_list == max_pfn_list) {
+ rep.in_pfn_list = in_pfn_list;
+ rep.more = 1;
+ rep.map_index = i;
+ break;
+ }
+ /*
+ * Exclude the free page managed by a buddy
+ */
+ if ((reqp->exclude_bits & DL_EXCLUDE_FREE)
+ && ((pagep->flags & (1UL << PG_slab)) == 0)
+ && (atomic_read(&pagep->_mapcount) ==
+ PAGE_BUDDY_MAPCOUNT_VALUE)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = pagep->private;
+ rep.pfn_free += (1 << pe->order);
+ }
+ /*
+ * Exclude the cache page without the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isPrivate(pagep->flags) && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache++;
+ }
+ /*
+ * Exclude the cache page with the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE_PRI)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache_private++;
+ }
+ /*
+ * Exclude the data page of the user process.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_USER_DATA)
+ && isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_user++;
+ }
+
+ }
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static ssize_t write_vmcore_pfn_lists(struct file *file,
+ const char __user *user_buf, size_t count, loff_t *ppos)
+{
+ int ret;
+ struct pfn_list_request pfn_list_request;
+
+ if (count != sizeof(struct pfn_list_request)) {
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&pfn_list_request, user_buf, count))
+ return -EFAULT;
+
+ if (pfn_list_request.request == PL_REQUEST_FREE) {
+ ret = write_vmcore_get_free(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_EXCLUDE) {
+ ret = write_vmcore_get_excludes(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_MEMMAP) {
+ ret = write_vmcore_get_memmap(&pfn_list_request);
+ } else {
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+ return count;
+}
+
+
static const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
.llseek = default_llseek,
};
+static const struct file_operations proc_vmcore_pfn_lists_operations = {
+ .write = write_vmcore_pfn_lists,
+};
+
static struct vmcore* __init get_new_element(void)
{
return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
@@ -696,6 +1263,10 @@ static int __init vmcore_init(void)
proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
if (proc_vmcore)
proc_vmcore->size = vmcore_size;
+
+ proc_vmcore_pfn_lists = proc_create("vmcore_pfn_lists", S_IWUSR, NULL,
+ &proc_vmcore_pfn_lists_operations);
+
return 0;
}
module_init(vmcore_init)
Index: linux/include/linux/makedumpfile.h
===================================================================
--- /dev/null
+++ linux/include/linux/makedumpfile.h
@@ -0,0 +1,115 @@
+/*
+ * makedumpfile.h
+ * portions Copyright (C) 2006, 2007, 2008, 2009 NEC Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define isLRU(flags) (flags & (1UL << PG_lru))
+#define isPrivate(flags) (flags & (1UL << PG_private))
+#define isSwapCache(flags) (flags & (1UL << PG_swapcache))
+
+static inline int
+isAnon(struct address_space *mapping)
+{
+ return ((unsigned long)mapping & PAGE_MAPPING_ANON) != 0;
+}
+
+#define DL_EXCLUDE_ZERO (0x001) /* Exclude Pages filled with Zeros */
+#define DL_EXCLUDE_CACHE (0x002) /* Exclude Cache Pages
+ without Private Pages */
+#define DL_EXCLUDE_CACHE_PRI (0x004) /* Exclude Cache Pages
+ with Private Pages */
+#define DL_EXCLUDE_USER_DATA (0x008) /* Exclude UserProcessData Pages */
+#define DL_EXCLUDE_FREE (0x010) /* Exclude Free Pages */
+
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negotiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
+ unsigned long long pfn_start;
+ unsigned long long pfn_end;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
+};
[-- Attachment #4: 121207.vmcore_pagescans.rhel --]
[-- Type: text/plain, Size: 21607 bytes --]
Subject: [PATCH] scan page tables for makedumpfile
---
fs/proc/vmcore.c | 568 +++++++++++++++++++++++++++++++++++++++++++
include/linux/makedumpfile.h | 115 ++++++++
2 files changed, 683 insertions(+)
Index: linux/fs/proc/vmcore.c
===================================================================
--- linux.orig/fs/proc/vmcore.c
+++ linux/fs/proc/vmcore.c
@@ -17,8 +17,18 @@
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/list.h>
+#include <linux/makedumpfile.h>
+#include <linux/mmzone.h>
#include <asm/uaccess.h>
#include <asm/io.h>
+#include <asm/page.h>
+static int num_mem_map_data = 0;
+static struct mem_map_data *mem_map_data;
+static struct pfn_element *pfn_list;
+static long in_pfn_list;
+static int last_found_vaddr = 0;
+static int last_found_paddr = 0;
+static int max_pfn_list;
/* List representing chunks of contiguous memory areas and their offsets in
* vmcore file.
@@ -33,6 +43,7 @@ static size_t elfcorebuf_sz;
static u64 vmcore_size;
static struct proc_dir_entry *proc_vmcore = NULL;
+static struct proc_dir_entry *proc_vmcore_pfn_lists = NULL;
/* Reads a page from the oldmem device from given offset. */
static ssize_t read_from_oldmem(char *buf, size_t count,
@@ -160,10 +171,563 @@ static ssize_t read_vmcore(struct file *
return acc;
}
+/*
+ * Given the boot-kernel-relative virtual address of a page
+ * return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+unsigned long
+find_local_vaddr(unsigned long orig_vaddr)
+{
+ int i;
+ int fnd = 0;
+ struct mem_map_data *mmd, *next_mmd;
+ unsigned long paddr;
+ unsigned long local_vaddr;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_vaddr, mmd = mem_map_data + last_found_vaddr,
+ next_mmd = mem_map_data + last_found_vaddr + 1;
+ i < num_mem_map_data; i++, mmd++, next_mmd++) {
+ if (mmd->mem_map && mmd->paddr) {
+ if (orig_vaddr >= mmd->mem_map &&
+ orig_vaddr < next_mmd->mem_map) {
+ offset = orig_vaddr - mmd->mem_map;
+ paddr = mmd->paddr + offset;
+ fnd++;
+ /* caching gives about 99% hit on first pass */
+ last_found_vaddr = i;
+ break;
+ }
+ }
+ }
+
+ if (! fnd) {
+ if (last_found_vaddr > 0) {
+ last_found_vaddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+ }
+
+ /* paddr is now the physical address of the page structure */
+ /* and offset is the offset into the found section, and we have
+ a table of how those sections are ioremap_cache'd */
+ local_vaddr = (unsigned long)mmd->section_vaddr + offset;
+ return local_vaddr;
+}
+
+/*
+ * Given a paddr, return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+void *
+find_local_from_paddr(unsigned long paddr)
+{
+ int i;
+ struct mem_map_data *mmd;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_paddr, mmd = mem_map_data + last_found_paddr;
+ i < num_mem_map_data; i++, mmd++) {
+ if ((paddr >= mmd->paddr) && (paddr < mmd->ending_paddr)) {
+ offset = paddr - mmd->paddr;
+ last_found_paddr = i;
+ /* caching gives about 98% hit on first pass */
+ return (void *)(mmd->section_vaddr + offset);
+ }
+ }
+
+ if (last_found_paddr > 0) {
+ last_found_paddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+}
+
+/*
+ * given an anchoring list_head, walk the list of free pages
+ * 'root' is a virtual address based on the ioremap_cache'd pointer pgp
+ * 'boot_root' is the virtual address of the list root, boot kernel relative
+ *
+ * return the number of pages found on the list
+ */
+int
+walk_freelist(struct list_head *root, int node, int zone, int order, int list,
+ int restart_list, int start_page, struct pfn_list_request *reqp,
+ struct pfn_reply *replyp, struct list_head *boot_root)
+{
+ int list_ct = 0;
+ int list_free_pages = 0;
+ int doit;
+ unsigned long start_pfn;
+ struct page *pagep;
+ struct page *local_pagep;
+ struct list_head *lhp;
+ struct list_head *local_lhp; /* crashkernel-relative */
+ struct list_head *prev;
+ struct pfn_element *pe;
+
+ /*
+ * root is the crashkernel-relative address of the anchor of the
+ * free_list.
+ */
+ prev = root;
+ if (root == NULL) {
+ printk(KERN_EMERG "root is null!!, node %d order %d\n",
+ node, order);
+ return 0;
+ }
+
+ if (root->next == boot_root)
+ /* list is empty */
+ return 0;
+
+ lhp = root->next;
+ local_lhp = (struct list_head *)find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp) {
+ return 0;
+ }
+
+ while (local_lhp != boot_root) {
+ list_ct++;
+ if (lhp == NULL) {
+ printk(KERN_EMERG
+ "The free list has a null!!, node %d order %d\n",
+ node, order);
+ break;
+ }
+ if (list_ct > 1 && local_lhp->prev != prev) {
+ /* can't be compared to root, as that is local */
+ printk(KERN_EMERG "The free list is broken!!\n");
+ break;
+ }
+
+ /* we want the boot kernel's pfn that this page represents */
+ pagep = container_of((struct list_head *)lhp,
+ struct page, lru);
+ start_pfn = pagep - vmemmap;
+ local_pagep = container_of((struct list_head *)local_lhp,
+ struct page, lru);
+ doit = 1;
+ if (restart_list && list_ct < start_page)
+ doit = 0;
+ if (doit) {
+ if (in_pfn_list == max_pfn_list) {
+ /* if array would overflow, come back to
+ this page with a continuation */
+ replyp->more = 1;
+ replyp->zone_index = zone;
+ replyp->freearea_index = order;
+ replyp->type_index = list;
+ replyp->list_ct = list_ct;
+ goto list_is_full;
+ }
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = start_pfn;
+ pe->order = order;
+ list_free_pages += (1 << order);
+ }
+ prev = lhp;
+ lhp = local_pagep->lru.next;
+ /* the local node-relative vaddr: */
+ local_lhp = (struct list_head *)
+ find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp)
+ break;
+ }
+
+list_is_full:
+ return list_free_pages;
+}
+
+/*
+ * Return the pfns of free pages on this node
+ */
+int
+write_vmcore_get_free(struct pfn_list_request *reqp)
+{
+ int node;
+ int nr_zones;
+ int nr_orders = MAX_ORDER;
+ int nr_freelist = MIGRATE_TYPES;
+ int zone;
+ int order;
+ int list;
+ int start_zone = 0;
+ int start_order = 0;
+ int start_list = 0;
+ int ret;
+ int restart = 0;
+ int start_page = 0;
+ int node_free_pages = 0;
+ struct pfn_reply rep;
+ struct pglist_data *pgp;
+ struct zone *zonep;
+ struct free_area *fap;
+ struct list_head *flp;
+ struct list_head *boot_root;
+ unsigned long pgdat_paddr;
+ unsigned long pgdat_vaddr;
+ unsigned long page_aligned_pgdat;
+ unsigned long page_aligned_size;
+ void *mapped_vaddr;
+
+ node = reqp->node;
+ pgdat_paddr = reqp->pgdat_paddr;
+ pgdat_vaddr = reqp->pgdat_vaddr;
+
+ /* map this pglist_data structure within a page-aligned area */
+ page_aligned_pgdat = pgdat_paddr & ~(PAGE_SIZE - 1);
+ page_aligned_size = sizeof(struct pglist_data) +
+ (pgdat_paddr - page_aligned_pgdat);
+ page_aligned_size = ((page_aligned_size + (PAGE_SIZE - 1))
+ >> PAGE_SHIFT) << PAGE_SHIFT;
+ mapped_vaddr = ioremap_cache(page_aligned_pgdat, page_aligned_size);
+ if (!mapped_vaddr) {
+ printk("ioremap_cache of pgdat %#lx failed\n",
+ page_aligned_pgdat);
+ return -EINVAL;
+ }
+ pgp = (struct pglist_data *)(mapped_vaddr +
+ (pgdat_paddr - page_aligned_pgdat));
+ nr_zones = pgp->nr_zones;
+ memset(&rep, 0, sizeof(rep));
+
+ if (reqp->more) {
+ restart = 1;
+ start_zone = reqp->zone_index;
+ start_order = reqp->freearea_index;
+ start_list = reqp->type_index;
+ start_page = reqp->list_ct;
+ }
+
+ in_pfn_list = 0;
+ for (zone = start_zone; zone < nr_zones; zone++) {
+ zonep = &pgp->node_zones[zone];
+ for (order = start_order; order < nr_orders; order++) {
+ fap = &zonep->free_area[order];
+ /* some free_area's are all zero */
+ if (fap->nr_free) {
+ for (list = start_list; list < nr_freelist;
+ list++) {
+ flp = &fap->free_list[list];
+ boot_root = (struct list_head *)
+ (pgdat_vaddr +
+ ((unsigned long)flp -
+ (unsigned long)pgp));
+ ret = walk_freelist(flp, node, zone,
+ order, list, restart,
+ start_page, reqp, &rep,
+ boot_root);
+ node_free_pages += ret;
+ restart = 0;
+ if (rep.more)
+ goto list_full;
+ }
+ }
+ }
+ }
+list_full:
+
+ iounmap(mapped_vaddr);
+
+ /* copy the reply and the valid part of our pfn list to the user */
+ rep.pfn_free = node_free_pages; /* the total, for statistics */
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+/*
+ * Get the memap_data table from makedumpfile
+ * and do the single allocate of the pfn_list.
+ */
+int
+write_vmcore_get_memmap(struct pfn_list_request *reqp)
+{
+ int i;
+ int count;
+ int size;
+ int ret = 0;
+ long pfn_list_elements;
+ long malloc_size;
+ unsigned long page_section_start;
+ unsigned long page_section_size;
+ struct mem_map_data *mmd, *dum_mmd;
+ struct pfn_reply rep;
+ void *bufptr;
+
+ rep.pfn_list_elements = 0;
+ if (num_mem_map_data) {
+ /* shouldn't have been done before, but if it was.. */
+ printk(KERN_INFO "warning: PL_REQUEST_MEMMAP is repeated\n");
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data;
+ i++, mmd++) {
+ iounmap(mmd->section_vaddr);
+ }
+ kfree(mem_map_data);
+ mem_map_data = NULL;
+ num_mem_map_data = 0;
+ kfree(pfn_list);
+ pfn_list = NULL;
+ }
+
+ count = reqp->map_count;
+ size = reqp->map_size;
+ bufptr = reqp->map_ptr;
+ if (size != (count * sizeof(struct mem_map_data))) {
+ printk("Error in mem_map_data, %d * %ld != %d\n",
+ count, sizeof(struct mem_map_data), size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* add a dummy at the end to limit the size of the last entry */
+ size += sizeof(struct mem_map_data);
+
+ mem_map_data = kzalloc(size, GFP_KERNEL);
+ if (!mem_map_data) {
+ printk("kmalloc of mem_map_data for %d failed\n", size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (copy_from_user(mem_map_data, bufptr, size)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ num_mem_map_data = count;
+
+ /* construct the dummy entry to limit the size of 'next_mmd->mem_map' */
+ /* (see find_local_vaddr() ) */
+ mmd = mem_map_data + (num_mem_map_data - 1);
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ dum_mmd = mmd + 1;
+ *dum_mmd = *mmd;
+ dum_mmd->mem_map += page_section_size;
+
+ /* Fill in the ending address of array of page struct */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ mmd->ending_paddr = mmd->paddr +
+ ((mmd->pfn_end - mmd->pfn_start) * sizeof(struct page));
+ }
+
+ /* Map each section of page structures to local virtual addresses */
+ /* (these are never iounmap'd, as this is the crash kernel) */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ page_section_start = mmd->paddr;
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ mmd->section_vaddr = ioremap_cache(page_section_start,
+ page_section_size);
+ if (!mmd->section_vaddr) {
+ printk(
+ "ioremap_cache of [%d] node %#lx for %#lx failed\n",
+ i, page_section_start, page_section_size);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ /*
+ * allocate the array for PFN's (just once)
+ * get as much as we can, up to what the user specified, and return
+ * that count to the user
+ */
+ pfn_list_elements = reqp->list_size;
+ do {
+ malloc_size = pfn_list_elements * sizeof(struct pfn_element);
+ if ((pfn_list = kmalloc(malloc_size, GFP_KERNEL)) != NULL) {
+ rep.pfn_list_elements = pfn_list_elements;
+ max_pfn_list = pfn_list_elements;
+ goto out;
+ }
+ pfn_list_elements -= 1000;
+ } while (pfn_list == NULL && pfn_list_elements > 0);
+
+ ret = -EINVAL;
+out:
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ return ret;
+}
+
+/*
+ * Return the pfns of to-be-excluded pages fulfilling this request.
+ * This is called for each mem_map in makedumpfile's list.
+ */
+int
+write_vmcore_get_excludes(struct pfn_list_request *reqp)
+{
+ int i;
+ int start = 0;
+ int end;
+ unsigned long paddr;
+ unsigned long pfn;
+ void *vaddr;
+ struct page *pagep;
+ struct pfn_reply rep;
+ struct pfn_element *pe;
+
+ if (!num_mem_map_data) {
+ /* sanity check */
+ printk(
+ "ERROR:PL_REQUEST_MEMMAP not done before PL_REQUEST_EXCLUDE\n");
+ return -EINVAL;
+ }
+
+ /*
+ * the request contains (besides request type and bufptr):
+ * paddr (physical address of the page[0]
+ * count of pages in the block
+ * exclude bits (DL_EXCLUDE_...)
+ */
+ paddr = reqp->paddr;
+ end = reqp->count;
+ pfn = reqp->pfn_start;
+ /* find the already-mapped vaddr of this paddr */
+ vaddr = find_local_from_paddr(paddr);
+ if (!vaddr) {
+ printk("ERROR: PL_REQUEST_EXCLUDE cannot find paddr %#lx\n",
+ paddr);
+ return -EINVAL;
+ }
+ if (reqp->more) {
+ start = reqp->map_index;
+ vaddr += (reqp->map_index * sizeof(struct page));
+ pfn += reqp->map_index;
+ }
+ memset(&rep, 0, sizeof(rep));
+ in_pfn_list = 0;
+
+ for (i = start, pagep = (struct page *)vaddr; i < end;
+ i++, pagep++, pfn++) {
+ if (in_pfn_list == max_pfn_list) {
+ rep.in_pfn_list = in_pfn_list;
+ rep.more = 1;
+ rep.map_index = i;
+ break;
+ }
+ /*
+ * Exclude the free page managed by a buddy
+ */
+ if ((reqp->exclude_bits & DL_EXCLUDE_FREE)
+ && (pagep->flags & (1UL << PG_buddy))) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = pagep->private;
+ rep.pfn_free += (1 << pe->order);
+ }
+ /*
+ * Exclude the cache page without the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isPrivate(pagep->flags) && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache++;
+ }
+ /*
+ * Exclude the cache page with the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE_PRI)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache_private++;
+ }
+ /*
+ * Exclude the data page of the user process.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_USER_DATA)
+ && isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_user++;
+ }
+
+ }
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static ssize_t write_vmcore_pfn_lists(struct file *file,
+ const char __user *user_buf, size_t count, loff_t *ppos)
+{
+ int ret;
+ struct pfn_list_request pfn_list_request;
+
+ if (count != sizeof(struct pfn_list_request)) {
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&pfn_list_request, user_buf, count))
+ return -EFAULT;
+
+ if (pfn_list_request.request == PL_REQUEST_FREE) {
+ ret = write_vmcore_get_free(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_EXCLUDE) {
+ ret = write_vmcore_get_excludes(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_MEMMAP) {
+ ret = write_vmcore_get_memmap(&pfn_list_request);
+ } else {
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+ return count;
+}
+
static const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
};
+static const struct file_operations proc_vmcore_pfn_lists_operations = {
+ .write = write_vmcore_pfn_lists,
+};
+
static struct vmcore* __init get_new_element(void)
{
return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
@@ -648,6 +1212,10 @@ static int __init vmcore_init(void)
proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
if (proc_vmcore)
proc_vmcore->size = vmcore_size;
+
+ proc_vmcore_pfn_lists = proc_create("vmcore_pfn_lists", S_IWUSR, NULL,
+ &proc_vmcore_pfn_lists_operations);
+
return 0;
}
module_init(vmcore_init)
Index: linux/include/linux/makedumpfile.h
===================================================================
--- /dev/null
+++ linux/include/linux/makedumpfile.h
@@ -0,0 +1,115 @@
+/*
+ * makedumpfile.h
+ * portions Copyright (C) 2006, 2007, 2008, 2009 NEC Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define isLRU(flags) (flags & (1UL << PG_lru))
+#define isPrivate(flags) (flags & (1UL << PG_private))
+#define isSwapCache(flags) (flags & (1UL << PG_swapcache))
+
+static inline int
+isAnon(struct address_space *mapping)
+{
+ return ((unsigned long)mapping & PAGE_MAPPING_ANON) != 0;
+}
+
+#define DL_EXCLUDE_ZERO (0x001) /* Exclude Pages filled with Zeros */
+#define DL_EXCLUDE_CACHE (0x002) /* Exclude Cache Pages
+ without Private Pages */
+#define DL_EXCLUDE_CACHE_PRI (0x004) /* Exclude Cache Pages
+ with Private Pages */
+#define DL_EXCLUDE_USER_DATA (0x008) /* Exclude UserProcessData Pages */
+#define DL_EXCLUDE_FREE (0x010) /* Exclude Free Pages */
+
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negotiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
+ unsigned long long pfn_start;
+ unsigned long long pfn_end;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
+};
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] makedumpfile: request the kernel do page scans
2012-12-10 0:59 ` [PATCH] makedumpfile: request the kernel do page scans HATAYAMA Daisuke
2012-12-10 15:36 ` Cliff Wickman
2012-12-10 15:43 ` Cliff Wickman
@ 2012-12-10 15:50 ` Cliff Wickman
2 siblings, 0 replies; 7+ messages in thread
From: Cliff Wickman @ 2012-12-10 15:50 UTC (permalink / raw)
To: HATAYAMA Daisuke; +Cc: vgoyal, kexec, ptesarik, linux-kernel, kumagai-atsushi
[-- Attachment #1: Type: text/plain, Size: 130360 bytes --]
On Mon, Dec 10, 2012 at 09:59:29AM +0900, HATAYAMA Daisuke wrote:
> From: Cliff Wickman <cpw@sgi.com>
> Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
> Date: Mon, 19 Nov 2012 12:07:10 -0600
>
> > On Fri, Nov 16, 2012 at 03:39:44PM -0500, Vivek Goyal wrote:
> >> On Thu, Nov 15, 2012 at 04:52:40PM -0600, Cliff Wickman wrote:
> >> >
> >> > Gentlemen,
> >> >
> >> > I know this is rather late to the game, given all the recent work to speed
> >> > up makedumpfile and reduce the memory that it consumes.
> >> > But I've been experimenting with asking the kernel to scan the page tables
> >> > instead of reading all those page structures through /proc/vmcore.
> >> >
> >> > The results are rather dramatic -- if they weren't I would not presume to
> >> > suggest such a radical path.
> >> > On a small, idle UV system: about 4 sec. versus about 40 sec.
> >> > On a 8TB UV the unnecessary page scan alone takes 4 minutes, vs. about 200 min
> >> > through /proc/vmcore.
> >> >
> >> > I have not compared it to your version 1.5.1, so I don't know if your recent
> >> > work provides similar speedups.
> >>
> >> I guess try 1.5.1-rc. IIUC, we had the logic of going through page tables
> >> but that required one single bitmap to be present and in constrained
> >> memory environment we will not have that.
> >>
> >> That's when this idea came up that scan portion of struct page range,
> >> filter it, dump it and then move on to next range.
> >>
> >> Even after 1.5.1-rc if difference is this dramatic, that means we are
> >> not doing something right in makedumpfile and it needs to be
> >> fixed/optimized.
> >>
> >> But moving the logic to kernel does not make much sense to me at this
> >> point of time untile and unless there is a good explanation that why
> >> user space can't do a good job of what kernel is doing.
> >
> > I tested a patch in which makedumpfile does nothing but scan all the
> > page structures using /proc/vmcore. It is simply reading each consecutive
> > range of page structures in readmem() chunks of 512 structures. And doing
> > nothing more than accumulating a hash total of the 'flags' field in each
> > page (for a sanity check). On my test machine there are 6 blocks of page
> > structures, totaling 12 million structures. This takes 31.1 'units of time'
> > (I won't say seconds, as the speed of the clock seems to be way too fast in
> > the crash kernel). If I increase the buffer size to 5120 structures: 31.0 units.
> > At 51200 structures: 30.9. So buffer size has virtually no effect.
> >
> > I also request the kernel to do the same thing. Each of the 6 requests
> > asks the kernel to scan a range of page structures and accumulate a hash
> > total of the 'flags' field. (And also copy a 10000-element pfn list back
> > to user space, to test that such copies don't add significant overhead.)
> > And the 12 million pages are scanned in 1.6 'units of time'.
> >
> > If I compare the time for actual page scanning (unnecessary pages and
> > free pages) through /proc/vmcore vs. requesting the kernel to do the
> > scanning: 40 units vs. 3.8 units.
> >
> > My conclusion is that makedumpfile's page scanning procedure is extremely
> > dominated by the overhead of copying page structures through /proc/vmcore.
> > And that is about 20x slower than using the kernel to access pages.
>
> I have not tested your patch set on the machine with 2TB due to
> reservation problem, but I already tested it on my local machine with
> 32GB and saw big performance improvement.
>
> I applied your patch set on makedumpfile v1.5.1-rc and added an option
> -N not to dump pages to focus on scanning pages part only.
>
> By this, while scanning pages in user-space took about 25 seconds,
> scanning pages in kernel-space took about 1 second.
>
> During the execution I profiled it using perf record/report and its
> results are attached files.
>
> >From this we can notice that current makedumpfile consumes large part
> of execution time for ioremap and its related processing. copy_to_user
> was less than 2% only relative to a whole processing.
>
> Looking into the codes around read method of /proc/vmcore, its call
> stack can be broken into as follows:
>
> read_vmcore
> read_from_oldmem
> copy_oldmem_page
>
> copy_oldmem_page reads the 1st kernel's memory *per page* using
> ioremap_cache and after completing it, immediately unmaps the remapped
> address using iounmap.
>
> Because ioremap/iounmap is called *per page*, this number of calling
> ioremap throught scanning a whole pages is unchanged even if
> makedumpfile's cache size is changed. This seems consistent with
> Cliff's explanation that increasing 512 entries of makedumpfile's
> cache was meaningless.
>
> I think the first step to address this issue is to introduce a kind of
> cache in read_vmcore path to reduce the number of calling
> ioremap/iounmap. Porting scanning logic into kernel-space should be
> considered if it turns out not to work enough.
>
> Thanks.
> HATAYAMA, Daisuke
(resending this as I seem to have messed up the email header)
Hi Hatayama,
If ioremap/iounmap is the bottleneck then perhaps you could do what
my patch does: it consolidates all the ranges of physical addresses
where the boot kernel's page structures reside (see make_kernel_mmap())
and passes them to the kernel, which then does a handfull of ioremaps's
to
cover all of them. Then /proc/vmcore could look up the already-mapped
virtual address.
(also note a kludge in get_mm_sparsemem() that verifies that each
section
of the mem_map spans contiguous ranges of page structures. I had
trouble with some sections when I made that assumption)
I'm attaching 3 patches that might be useful in your testing:
- 121210.proc_vmcore2 my current patch that applies to the released
makedumpfile 1.5.1
- 121207.vmcore_pagescans.sles applies to a 3.0.13 kernel
- 121207.vmcore_pagescans.rhel applies to a 2.6.32 kernel
-Cliff
> sadump: does not have partition header
> sadump: read dump device as unknown format
> sadump: unknown format
> LOAD (0)
> phys_start : 1000000
> phys_end : 22f1000
> virt_start : ffffffff81000000
> virt_end : ffffffff822f1000
> LOAD (1)
> phys_start : 10000
> phys_end : 9b000
> virt_start : ffff880000010000
> virt_end : ffff88000009b000
> LOAD (2)
> phys_start : 100000
> phys_end : 27000000
> virt_start : ffff880000100000
> virt_end : ffff880027000000
> LOAD (3)
> phys_start : 37000000
> phys_end : 7b00d000
> virt_start : ffff880037000000
> virt_end : ffff88007b00d000
> LOAD (4)
> phys_start : 100000000
> phys_end : 880000000
> virt_start : ffff880100000000
> virt_end : ffff880880000000
> Linux kdump
> page_size : 4096
> page_size : 4096
>
> max_mapnr : 880000
>
> Buffer size for the cyclic mode: 2228224
>
> num of NODEs : 4
>
>
> Memory type : SPARSEMEM_EX
>
> mem_map (0)
> mem_map : ffffea0000000000
> pfn_start : 0
> pfn_end : 8000
> mem_map (1)
> mem_map : ffffea00001c0000
> pfn_start : 8000
> pfn_end : 10000
> mem_map (2)
> mem_map : ffffea0000380000
> pfn_start : 10000
> pfn_end : 18000
> mem_map (3)
> mem_map : ffffea0000540000
> pfn_start : 18000
> pfn_end : 20000
> mem_map (4)
> mem_map : ffffea0000700000
> pfn_start : 20000
> pfn_end : 28000
> mem_map (5)
> mem_map : ffffea00008c0000
> pfn_start : 28000
> pfn_end : 30000
> mem_map (6)
> mem_map : ffffea0000a80000
> pfn_start : 30000
> pfn_end : 38000
> mem_map (7)
> mem_map : ffffea0000c40000
> pfn_start : 38000
> pfn_end : 40000
> mem_map (8)
> mem_map : ffffea0000e00000
> pfn_start : 40000
> pfn_end : 48000
> mem_map (9)
> mem_map : ffffea0000fc0000
> pfn_start : 48000
> pfn_end : 50000
> mem_map (10)
> mem_map : ffffea0001180000
> pfn_start : 50000
> pfn_end : 58000
> mem_map (11)
> mem_map : ffffea0001340000
> pfn_start : 58000
> pfn_end : 60000
> mem_map (12)
> mem_map : ffffea0001500000
> pfn_start : 60000
> pfn_end : 68000
> mem_map (13)
> mem_map : ffffea00016c0000
> pfn_start : 68000
> pfn_end : 70000
> mem_map (14)
> mem_map : ffffea0001880000
> pfn_start : 70000
> pfn_end : 78000
> mem_map (15)
> mem_map : ffffea0001a40000
> pfn_start : 78000
> pfn_end : 80000
> mem_map (16)
> mem_map : 0
> pfn_start : 80000
> pfn_end : 88000
> mem_map (17)
> mem_map : 0
> pfn_start : 88000
> pfn_end : 90000
> mem_map (18)
> mem_map : 0
> pfn_start : 90000
> pfn_end : 98000
> mem_map (19)
> mem_map : 0
> pfn_start : 98000
> pfn_end : a0000
> mem_map (20)
> mem_map : 0
> pfn_start : a0000
> pfn_end : a8000
> mem_map (21)
> mem_map : 0
> pfn_start : a8000
> pfn_end : b0000
> mem_map (22)
> mem_map : 0
> pfn_start : b0000
> pfn_end : b8000
> mem_map (23)
> mem_map : 0
> pfn_start : b8000
> pfn_end : c0000
> mem_map (24)
> mem_map : 0
> pfn_start : c0000
> pfn_end : c8000
> mem_map (25)
> mem_map : 0
> pfn_start : c8000
> pfn_end : d0000
> mem_map (26)
> mem_map : 0
> pfn_start : d0000
> pfn_end : d8000
> mem_map (27)
> mem_map : 0
> pfn_start : d8000
> pfn_end : e0000
> mem_map (28)
> mem_map : 0
> pfn_start : e0000
> pfn_end : e8000
> mem_map (29)
> mem_map : 0
> pfn_start : e8000
> pfn_end : f0000
> mem_map (30)
> mem_map : 0
> pfn_start : f0000
> pfn_end : f8000
> mem_map (31)
> mem_map : 0
> pfn_start : f8000
> pfn_end : 100000
> mem_map (32)
> mem_map : ffffea0003800000
> pfn_start : 100000
> pfn_end : 108000
> mem_map (33)
> mem_map : ffffea00039c0000
> pfn_start : 108000
> pfn_end : 110000
> mem_map (34)
> mem_map : ffffea0003b80000
> pfn_start : 110000
> pfn_end : 118000
> mem_map (35)
> mem_map : ffffea0003d40000
> pfn_start : 118000
> pfn_end : 120000
> mem_map (36)
> mem_map : ffffea0003f00000
> pfn_start : 120000
> pfn_end : 128000
> mem_map (37)
> mem_map : ffffea00040c0000
> pfn_start : 128000
> pfn_end : 130000
> mem_map (38)
> mem_map : ffffea0004280000
> pfn_start : 130000
> pfn_end : 138000
> mem_map (39)
> mem_map : ffffea0004440000
> pfn_start : 138000
> pfn_end : 140000
> mem_map (40)
> mem_map : ffffea0004600000
> pfn_start : 140000
> pfn_end : 148000
> mem_map (41)
> mem_map : ffffea00047c0000
> pfn_start : 148000
> pfn_end : 150000
> mem_map (42)
> mem_map : ffffea0004980000
> pfn_start : 150000
> pfn_end : 158000
> mem_map (43)
> mem_map : ffffea0004b40000
> pfn_start : 158000
> pfn_end : 160000
> mem_map (44)
> mem_map : ffffea0004d00000
> pfn_start : 160000
> pfn_end : 168000
> mem_map (45)
> mem_map : ffffea0004ec0000
> pfn_start : 168000
> pfn_end : 170000
> mem_map (46)
> mem_map : ffffea0005080000
> pfn_start : 170000
> pfn_end : 178000
> mem_map (47)
> mem_map : ffffea0005240000
> pfn_start : 178000
> pfn_end : 180000
> mem_map (48)
> mem_map : ffffea0005400000
> pfn_start : 180000
> pfn_end : 188000
> mem_map (49)
> mem_map : ffffea00055c0000
> pfn_start : 188000
> pfn_end : 190000
> mem_map (50)
> mem_map : ffffea0005780000
> pfn_start : 190000
> pfn_end : 198000
> mem_map (51)
> mem_map : ffffea0005940000
> pfn_start : 198000
> pfn_end : 1a0000
> mem_map (52)
> mem_map : ffffea0005b00000
> pfn_start : 1a0000
> pfn_end : 1a8000
> mem_map (53)
> mem_map : ffffea0005cc0000
> pfn_start : 1a8000
> pfn_end : 1b0000
> mem_map (54)
> mem_map : ffffea0005e80000
> pfn_start : 1b0000
> pfn_end : 1b8000
> mem_map (55)
> mem_map : ffffea0006040000
> pfn_start : 1b8000
> pfn_end : 1c0000
> mem_map (56)
> mem_map : ffffea0006200000
> pfn_start : 1c0000
> pfn_end : 1c8000
> mem_map (57)
> mem_map : ffffea00063c0000
> pfn_start : 1c8000
> pfn_end : 1d0000
> mem_map (58)
> mem_map : ffffea0006580000
> pfn_start : 1d0000
> pfn_end : 1d8000
> mem_map (59)
> mem_map : ffffea0006740000
> pfn_start : 1d8000
> pfn_end : 1e0000
> mem_map (60)
> mem_map : ffffea0006900000
> pfn_start : 1e0000
> pfn_end : 1e8000
> mem_map (61)
> mem_map : ffffea0006ac0000
> pfn_start : 1e8000
> pfn_end : 1f0000
> mem_map (62)
> mem_map : ffffea0006c80000
> pfn_start : 1f0000
> pfn_end : 1f8000
> mem_map (63)
> mem_map : ffffea0006e40000
> pfn_start : 1f8000
> pfn_end : 200000
> mem_map (64)
> mem_map : ffffea0007000000
> pfn_start : 200000
> pfn_end : 208000
> mem_map (65)
> mem_map : ffffea00071c0000
> pfn_start : 208000
> pfn_end : 210000
> mem_map (66)
> mem_map : ffffea0007380000
> pfn_start : 210000
> pfn_end : 218000
> mem_map (67)
> mem_map : ffffea0007540000
> pfn_start : 218000
> pfn_end : 220000
> mem_map (68)
> mem_map : ffffea0007700000
> pfn_start : 220000
> pfn_end : 228000
> mem_map (69)
> mem_map : ffffea00078c0000
> pfn_start : 228000
> pfn_end : 230000
> mem_map (70)
> mem_map : ffffea0007a80000
> pfn_start : 230000
> pfn_end : 238000
> mem_map (71)
> mem_map : ffffea0007c40000
> pfn_start : 238000
> pfn_end : 240000
> mem_map (72)
> mem_map : ffffea0007e00000
> pfn_start : 240000
> pfn_end : 248000
> mem_map (73)
> mem_map : ffffea0007fc0000
> pfn_start : 248000
> pfn_end : 250000
> mem_map (74)
> mem_map : ffffea0008180000
> pfn_start : 250000
> pfn_end : 258000
> mem_map (75)
> mem_map : ffffea0008340000
> pfn_start : 258000
> pfn_end : 260000
> mem_map (76)
> mem_map : ffffea0008500000
> pfn_start : 260000
> pfn_end : 268000
> mem_map (77)
> mem_map : ffffea00086c0000
> pfn_start : 268000
> pfn_end : 270000
> mem_map (78)
> mem_map : ffffea0008880000
> pfn_start : 270000
> pfn_end : 278000
> mem_map (79)
> mem_map : ffffea0008a40000
> pfn_start : 278000
> pfn_end : 280000
> mem_map (80)
> mem_map : ffffea0008c00000
> pfn_start : 280000
> pfn_end : 288000
> mem_map (81)
> mem_map : ffffea0008dc0000
> pfn_start : 288000
> pfn_end : 290000
> mem_map (82)
> mem_map : ffffea0008f80000
> pfn_start : 290000
> pfn_end : 298000
> mem_map (83)
> mem_map : ffffea0009140000
> pfn_start : 298000
> pfn_end : 2a0000
> mem_map (84)
> mem_map : ffffea0009300000
> pfn_start : 2a0000
> pfn_end : 2a8000
> mem_map (85)
> mem_map : ffffea00094c0000
> pfn_start : 2a8000
> pfn_end : 2b0000
> mem_map (86)
> mem_map : ffffea0009680000
> pfn_start : 2b0000
> pfn_end : 2b8000
> mem_map (87)
> mem_map : ffffea0009840000
> pfn_start : 2b8000
> pfn_end : 2c0000
> mem_map (88)
> mem_map : ffffea0009a00000
> pfn_start : 2c0000
> pfn_end : 2c8000
> mem_map (89)
> mem_map : ffffea0009bc0000
> pfn_start : 2c8000
> pfn_end : 2d0000
> mem_map (90)
> mem_map : ffffea0009d80000
> pfn_start : 2d0000
> pfn_end : 2d8000
> mem_map (91)
> mem_map : ffffea0009f40000
> pfn_start : 2d8000
> pfn_end : 2e0000
> mem_map (92)
> mem_map : ffffea000a100000
> pfn_start : 2e0000
> pfn_end : 2e8000
> mem_map (93)
> mem_map : ffffea000a2c0000
> pfn_start : 2e8000
> pfn_end : 2f0000
> mem_map (94)
> mem_map : ffffea000a480000
> pfn_start : 2f0000
> pfn_end : 2f8000
> mem_map (95)
> mem_map : ffffea000a640000
> pfn_start : 2f8000
> pfn_end : 300000
> mem_map (96)
> mem_map : ffffea000a800000
> pfn_start : 300000
> pfn_end : 308000
> mem_map (97)
> mem_map : ffffea000a9c0000
> pfn_start : 308000
> pfn_end : 310000
> mem_map (98)
> mem_map : ffffea000ab80000
> pfn_start : 310000
> pfn_end : 318000
> mem_map (99)
> mem_map : ffffea000ad40000
> pfn_start : 318000
> pfn_end : 320000
> mem_map (100)
> mem_map : ffffea000af00000
> pfn_start : 320000
> pfn_end : 328000
> mem_map (101)
> mem_map : ffffea000b0c0000
> pfn_start : 328000
> pfn_end : 330000
> mem_map (102)
> mem_map : ffffea000b280000
> pfn_start : 330000
> pfn_end : 338000
> mem_map (103)
> mem_map : ffffea000b440000
> pfn_start : 338000
> pfn_end : 340000
> mem_map (104)
> mem_map : ffffea000b600000
> pfn_start : 340000
> pfn_end : 348000
> mem_map (105)
> mem_map : ffffea000b7c0000
> pfn_start : 348000
> pfn_end : 350000
> mem_map (106)
> mem_map : ffffea000b980000
> pfn_start : 350000
> pfn_end : 358000
> mem_map (107)
> mem_map : ffffea000bb40000
> pfn_start : 358000
> pfn_end : 360000
> mem_map (108)
> mem_map : ffffea000bd00000
> pfn_start : 360000
> pfn_end : 368000
> mem_map (109)
> mem_map : ffffea000bec0000
> pfn_start : 368000
> pfn_end : 370000
> mem_map (110)
> mem_map : ffffea000c080000
> pfn_start : 370000
> pfn_end : 378000
> mem_map (111)
> mem_map : ffffea000c240000
> pfn_start : 378000
> pfn_end : 380000
> mem_map (112)
> mem_map : ffffea000c400000
> pfn_start : 380000
> pfn_end : 388000
> mem_map (113)
> mem_map : ffffea000c5c0000
> pfn_start : 388000
> pfn_end : 390000
> mem_map (114)
> mem_map : ffffea000c780000
> pfn_start : 390000
> pfn_end : 398000
> mem_map (115)
> mem_map : ffffea000c940000
> pfn_start : 398000
> pfn_end : 3a0000
> mem_map (116)
> mem_map : ffffea000cb00000
> pfn_start : 3a0000
> pfn_end : 3a8000
> mem_map (117)
> mem_map : ffffea000ccc0000
> pfn_start : 3a8000
> pfn_end : 3b0000
> mem_map (118)
> mem_map : ffffea000ce80000
> pfn_start : 3b0000
> pfn_end : 3b8000
> mem_map (119)
> mem_map : ffffea000d040000
> pfn_start : 3b8000
> pfn_end : 3c0000
> mem_map (120)
> mem_map : ffffea000d200000
> pfn_start : 3c0000
> pfn_end : 3c8000
> mem_map (121)
> mem_map : ffffea000d3c0000
> pfn_start : 3c8000
> pfn_end : 3d0000
> mem_map (122)
> mem_map : ffffea000d580000
> pfn_start : 3d0000
> pfn_end : 3d8000
> mem_map (123)
> mem_map : ffffea000d740000
> pfn_start : 3d8000
> pfn_end : 3e0000
> mem_map (124)
> mem_map : ffffea000d900000
> pfn_start : 3e0000
> pfn_end : 3e8000
> mem_map (125)
> mem_map : ffffea000dac0000
> pfn_start : 3e8000
> pfn_end : 3f0000
> mem_map (126)
> mem_map : ffffea000dc80000
> pfn_start : 3f0000
> pfn_end : 3f8000
> mem_map (127)
> mem_map : ffffea000de40000
> pfn_start : 3f8000
> pfn_end : 400000
> mem_map (128)
> mem_map : ffffea000e000000
> pfn_start : 400000
> pfn_end : 408000
> mem_map (129)
> mem_map : ffffea000e1c0000
> pfn_start : 408000
> pfn_end : 410000
> mem_map (130)
> mem_map : ffffea000e380000
> pfn_start : 410000
> pfn_end : 418000
> mem_map (131)
> mem_map : ffffea000e540000
> pfn_start : 418000
> pfn_end : 420000
> mem_map (132)
> mem_map : ffffea000e700000
> pfn_start : 420000
> pfn_end : 428000
> mem_map (133)
> mem_map : ffffea000e8c0000
> pfn_start : 428000
> pfn_end : 430000
> mem_map (134)
> mem_map : ffffea000ea80000
> pfn_start : 430000
> pfn_end : 438000
> mem_map (135)
> mem_map : ffffea000ec40000
> pfn_start : 438000
> pfn_end : 440000
> mem_map (136)
> mem_map : ffffea000ee00000
> pfn_start : 440000
> pfn_end : 448000
> mem_map (137)
> mem_map : ffffea000efc0000
> pfn_start : 448000
> pfn_end : 450000
> mem_map (138)
> mem_map : ffffea000f180000
> pfn_start : 450000
> pfn_end : 458000
> mem_map (139)
> mem_map : ffffea000f340000
> pfn_start : 458000
> pfn_end : 460000
> mem_map (140)
> mem_map : ffffea000f500000
> pfn_start : 460000
> pfn_end : 468000
> mem_map (141)
> mem_map : ffffea000f6c0000
> pfn_start : 468000
> pfn_end : 470000
> mem_map (142)
> mem_map : ffffea000f880000
> pfn_start : 470000
> pfn_end : 478000
> mem_map (143)
> mem_map : ffffea000fa40000
> pfn_start : 478000
> pfn_end : 480000
> mem_map (144)
> mem_map : ffffea000fc00000
> pfn_start : 480000
> pfn_end : 488000
> mem_map (145)
> mem_map : ffffea000fdc0000
> pfn_start : 488000
> pfn_end : 490000
> mem_map (146)
> mem_map : ffffea000ff80000
> pfn_start : 490000
> pfn_end : 498000
> mem_map (147)
> mem_map : ffffea0010140000
> pfn_start : 498000
> pfn_end : 4a0000
> mem_map (148)
> mem_map : ffffea0010300000
> pfn_start : 4a0000
> pfn_end : 4a8000
> mem_map (149)
> mem_map : ffffea00104c0000
> pfn_start : 4a8000
> pfn_end : 4b0000
> mem_map (150)
> mem_map : ffffea0010680000
> pfn_start : 4b0000
> pfn_end : 4b8000
> mem_map (151)
> mem_map : ffffea0010840000
> pfn_start : 4b8000
> pfn_end : 4c0000
> mem_map (152)
> mem_map : ffffea0010a00000
> pfn_start : 4c0000
> pfn_end : 4c8000
> mem_map (153)
> mem_map : ffffea0010bc0000
> pfn_start : 4c8000
> pfn_end : 4d0000
> mem_map (154)
> mem_map : ffffea0010d80000
> pfn_start : 4d0000
> pfn_end : 4d8000
> mem_map (155)
> mem_map : ffffea0010f40000
> pfn_start : 4d8000
> pfn_end : 4e0000
> mem_map (156)
> mem_map : ffffea0011100000
> pfn_start : 4e0000
> pfn_end : 4e8000
> mem_map (157)
> mem_map : ffffea00112c0000
> pfn_start : 4e8000
> pfn_end : 4f0000
> mem_map (158)
> mem_map : ffffea0011480000
> pfn_start : 4f0000
> pfn_end : 4f8000
> mem_map (159)
> mem_map : ffffea0011640000
> pfn_start : 4f8000
> pfn_end : 500000
> mem_map (160)
> mem_map : ffffea0011800000
> pfn_start : 500000
> pfn_end : 508000
> mem_map (161)
> mem_map : ffffea00119c0000
> pfn_start : 508000
> pfn_end : 510000
> mem_map (162)
> mem_map : ffffea0011b80000
> pfn_start : 510000
> pfn_end : 518000
> mem_map (163)
> mem_map : ffffea0011d40000
> pfn_start : 518000
> pfn_end : 520000
> mem_map (164)
> mem_map : ffffea0011f00000
> pfn_start : 520000
> pfn_end : 528000
> mem_map (165)
> mem_map : ffffea00120c0000
> pfn_start : 528000
> pfn_end : 530000
> mem_map (166)
> mem_map : ffffea0012280000
> pfn_start : 530000
> pfn_end : 538000
> mem_map (167)
> mem_map : ffffea0012440000
> pfn_start : 538000
> pfn_end : 540000
> mem_map (168)
> mem_map : ffffea0012600000
> pfn_start : 540000
> pfn_end : 548000
> mem_map (169)
> mem_map : ffffea00127c0000
> pfn_start : 548000
> pfn_end : 550000
> mem_map (170)
> mem_map : ffffea0012980000
> pfn_start : 550000
> pfn_end : 558000
> mem_map (171)
> mem_map : ffffea0012b40000
> pfn_start : 558000
> pfn_end : 560000
> mem_map (172)
> mem_map : ffffea0012d00000
> pfn_start : 560000
> pfn_end : 568000
> mem_map (173)
> mem_map : ffffea0012ec0000
> pfn_start : 568000
> pfn_end : 570000
> mem_map (174)
> mem_map : ffffea0013080000
> pfn_start : 570000
> pfn_end : 578000
> mem_map (175)
> mem_map : ffffea0013240000
> pfn_start : 578000
> pfn_end : 580000
> mem_map (176)
> mem_map : ffffea0013400000
> pfn_start : 580000
> pfn_end : 588000
> mem_map (177)
> mem_map : ffffea00135c0000
> pfn_start : 588000
> pfn_end : 590000
> mem_map (178)
> mem_map : ffffea0013780000
> pfn_start : 590000
> pfn_end : 598000
> mem_map (179)
> mem_map : ffffea0013940000
> pfn_start : 598000
> pfn_end : 5a0000
> mem_map (180)
> mem_map : ffffea0013b00000
> pfn_start : 5a0000
> pfn_end : 5a8000
> mem_map (181)
> mem_map : ffffea0013cc0000
> pfn_start : 5a8000
> pfn_end : 5b0000
> mem_map (182)
> mem_map : ffffea0013e80000
> pfn_start : 5b0000
> pfn_end : 5b8000
> mem_map (183)
> mem_map : ffffea0014040000
> pfn_start : 5b8000
> pfn_end : 5c0000
> mem_map (184)
> mem_map : ffffea0014200000
> pfn_start : 5c0000
> pfn_end : 5c8000
> mem_map (185)
> mem_map : ffffea00143c0000
> pfn_start : 5c8000
> pfn_end : 5d0000
> mem_map (186)
> mem_map : ffffea0014580000
> pfn_start : 5d0000
> pfn_end : 5d8000
> mem_map (187)
> mem_map : ffffea0014740000
> pfn_start : 5d8000
> pfn_end : 5e0000
> mem_map (188)
> mem_map : ffffea0014900000
> pfn_start : 5e0000
> pfn_end : 5e8000
> mem_map (189)
> mem_map : ffffea0014ac0000
> pfn_start : 5e8000
> pfn_end : 5f0000
> mem_map (190)
> mem_map : ffffea0014c80000
> pfn_start : 5f0000
> pfn_end : 5f8000
> mem_map (191)
> mem_map : ffffea0014e40000
> pfn_start : 5f8000
> pfn_end : 600000
> mem_map (192)
> mem_map : ffffea0015000000
> pfn_start : 600000
> pfn_end : 608000
> mem_map (193)
> mem_map : ffffea00151c0000
> pfn_start : 608000
> pfn_end : 610000
> mem_map (194)
> mem_map : ffffea0015380000
> pfn_start : 610000
> pfn_end : 618000
> mem_map (195)
> mem_map : ffffea0015540000
> pfn_start : 618000
> pfn_end : 620000
> mem_map (196)
> mem_map : ffffea0015700000
> pfn_start : 620000
> pfn_end : 628000
> mem_map (197)
> mem_map : ffffea00158c0000
> pfn_start : 628000
> pfn_end : 630000
> mem_map (198)
> mem_map : ffffea0015a80000
> pfn_start : 630000
> pfn_end : 638000
> mem_map (199)
> mem_map : ffffea0015c40000
> pfn_start : 638000
> pfn_end : 640000
> mem_map (200)
> mem_map : ffffea0015e00000
> pfn_start : 640000
> pfn_end : 648000
> mem_map (201)
> mem_map : ffffea0015fc0000
> pfn_start : 648000
> pfn_end : 650000
> mem_map (202)
> mem_map : ffffea0016180000
> pfn_start : 650000
> pfn_end : 658000
> mem_map (203)
> mem_map : ffffea0016340000
> pfn_start : 658000
> pfn_end : 660000
> mem_map (204)
> mem_map : ffffea0016500000
> pfn_start : 660000
> pfn_end : 668000
> mem_map (205)
> mem_map : ffffea00166c0000
> pfn_start : 668000
> pfn_end : 670000
> mem_map (206)
> mem_map : ffffea0016880000
> pfn_start : 670000
> pfn_end : 678000
> mem_map (207)
> mem_map : ffffea0016a40000
> pfn_start : 678000
> pfn_end : 680000
> mem_map (208)
> mem_map : ffffea0016c00000
> pfn_start : 680000
> pfn_end : 688000
> mem_map (209)
> mem_map : ffffea0016dc0000
> pfn_start : 688000
> pfn_end : 690000
> mem_map (210)
> mem_map : ffffea0016f80000
> pfn_start : 690000
> pfn_end : 698000
> mem_map (211)
> mem_map : ffffea0017140000
> pfn_start : 698000
> pfn_end : 6a0000
> mem_map (212)
> mem_map : ffffea0017300000
> pfn_start : 6a0000
> pfn_end : 6a8000
> mem_map (213)
> mem_map : ffffea00174c0000
> pfn_start : 6a8000
> pfn_end : 6b0000
> mem_map (214)
> mem_map : ffffea0017680000
> pfn_start : 6b0000
> pfn_end : 6b8000
> mem_map (215)
> mem_map : ffffea0017840000
> pfn_start : 6b8000
> pfn_end : 6c0000
> mem_map (216)
> mem_map : ffffea0017a00000
> pfn_start : 6c0000
> pfn_end : 6c8000
> mem_map (217)
> mem_map : ffffea0017bc0000
> pfn_start : 6c8000
> pfn_end : 6d0000
> mem_map (218)
> mem_map : ffffea0017d80000
> pfn_start : 6d0000
> pfn_end : 6d8000
> mem_map (219)
> mem_map : ffffea0017f40000
> pfn_start : 6d8000
> pfn_end : 6e0000
> mem_map (220)
> mem_map : ffffea0018100000
> pfn_start : 6e0000
> pfn_end : 6e8000
> mem_map (221)
> mem_map : ffffea00182c0000
> pfn_start : 6e8000
> pfn_end : 6f0000
> mem_map (222)
> mem_map : ffffea0018480000
> pfn_start : 6f0000
> pfn_end : 6f8000
> mem_map (223)
> mem_map : ffffea0018640000
> pfn_start : 6f8000
> pfn_end : 700000
> mem_map (224)
> mem_map : ffffea0018800000
> pfn_start : 700000
> pfn_end : 708000
> mem_map (225)
> mem_map : ffffea00189c0000
> pfn_start : 708000
> pfn_end : 710000
> mem_map (226)
> mem_map : ffffea0018b80000
> pfn_start : 710000
> pfn_end : 718000
> mem_map (227)
> mem_map : ffffea0018d40000
> pfn_start : 718000
> pfn_end : 720000
> mem_map (228)
> mem_map : ffffea0018f00000
> pfn_start : 720000
> pfn_end : 728000
> mem_map (229)
> mem_map : ffffea00190c0000
> pfn_start : 728000
> pfn_end : 730000
> mem_map (230)
> mem_map : ffffea0019280000
> pfn_start : 730000
> pfn_end : 738000
> mem_map (231)
> mem_map : ffffea0019440000
> pfn_start : 738000
> pfn_end : 740000
> mem_map (232)
> mem_map : ffffea0019600000
> pfn_start : 740000
> pfn_end : 748000
> mem_map (233)
> mem_map : ffffea00197c0000
> pfn_start : 748000
> pfn_end : 750000
> mem_map (234)
> mem_map : ffffea0019980000
> pfn_start : 750000
> pfn_end : 758000
> mem_map (235)
> mem_map : ffffea0019b40000
> pfn_start : 758000
> pfn_end : 760000
> mem_map (236)
> mem_map : ffffea0019d00000
> pfn_start : 760000
> pfn_end : 768000
> mem_map (237)
> mem_map : ffffea0019ec0000
> pfn_start : 768000
> pfn_end : 770000
> mem_map (238)
> mem_map : ffffea001a080000
> pfn_start : 770000
> pfn_end : 778000
> mem_map (239)
> mem_map : ffffea001a240000
> pfn_start : 778000
> pfn_end : 780000
> mem_map (240)
> mem_map : ffffea001a400000
> pfn_start : 780000
> pfn_end : 788000
> mem_map (241)
> mem_map : ffffea001a5c0000
> pfn_start : 788000
> pfn_end : 790000
> mem_map (242)
> mem_map : ffffea001a780000
> pfn_start : 790000
> pfn_end : 798000
> mem_map (243)
> mem_map : ffffea001a940000
> pfn_start : 798000
> pfn_end : 7a0000
> mem_map (244)
> mem_map : ffffea001ab00000
> pfn_start : 7a0000
> pfn_end : 7a8000
> mem_map (245)
> mem_map : ffffea001acc0000
> pfn_start : 7a8000
> pfn_end : 7b0000
> mem_map (246)
> mem_map : ffffea001ae80000
> pfn_start : 7b0000
> pfn_end : 7b8000
> mem_map (247)
> mem_map : ffffea001b040000
> pfn_start : 7b8000
> pfn_end : 7c0000
> mem_map (248)
> mem_map : ffffea001b200000
> pfn_start : 7c0000
> pfn_end : 7c8000
> mem_map (249)
> mem_map : ffffea001b3c0000
> pfn_start : 7c8000
> pfn_end : 7d0000
> mem_map (250)
> mem_map : ffffea001b580000
> pfn_start : 7d0000
> pfn_end : 7d8000
> mem_map (251)
> mem_map : ffffea001b740000
> pfn_start : 7d8000
> pfn_end : 7e0000
> mem_map (252)
> mem_map : ffffea001b900000
> pfn_start : 7e0000
> pfn_end : 7e8000
> mem_map (253)
> mem_map : ffffea001bac0000
> pfn_start : 7e8000
> pfn_end : 7f0000
> mem_map (254)
> mem_map : ffffea001bc80000
> pfn_start : 7f0000
> pfn_end : 7f8000
> mem_map (255)
> mem_map : ffffea001be40000
> pfn_start : 7f8000
> pfn_end : 800000
> mem_map (256)
> mem_map : ffffea001c000000
> pfn_start : 800000
> pfn_end : 808000
> mem_map (257)
> mem_map : ffffea001c1c0000
> pfn_start : 808000
> pfn_end : 810000
> mem_map (258)
> mem_map : ffffea001c380000
> pfn_start : 810000
> pfn_end : 818000
> mem_map (259)
> mem_map : ffffea001c540000
> pfn_start : 818000
> pfn_end : 820000
> mem_map (260)
> mem_map : ffffea001c700000
> pfn_start : 820000
> pfn_end : 828000
> mem_map (261)
> mem_map : ffffea001c8c0000
> pfn_start : 828000
> pfn_end : 830000
> mem_map (262)
> mem_map : ffffea001ca80000
> pfn_start : 830000
> pfn_end : 838000
> mem_map (263)
> mem_map : ffffea001cc40000
> pfn_start : 838000
> pfn_end : 840000
> mem_map (264)
> mem_map : ffffea001ce00000
> pfn_start : 840000
> pfn_end : 848000
> mem_map (265)
> mem_map : ffffea001cfc0000
> pfn_start : 848000
> pfn_end : 850000
> mem_map (266)
> mem_map : ffffea001d180000
> pfn_start : 850000
> pfn_end : 858000
> mem_map (267)
> mem_map : ffffea001d340000
> pfn_start : 858000
> pfn_end : 860000
> mem_map\rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [ 3 %] \rExcluding unnecessary pages : [ 17 %] \rExcluding unnecessary pages : [ 26 %] \rExcluding unnecessary pages : [ 34 %] \rExcluding unnecessary pages : [ 42 %] \rExcluding unnecessary pages : [ 50 %] \rExcluding unnecessary pages : [ 59 %] \rExcluding unnecessary pages : [ 67 %] \rExcluding unnecessary pages : [ 75 %] \rExcluding unnecessary pages : [ 84 %] \rExcluding unnecessary pages : [ 92 %] \rExcluding unnecessary pages : [100 %] \rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [ 13 %] \rExcluding unnecessary pages : [ 22 %] \rExcluding unnecessary pages : [ 30 %] \rExcluding unnecessary pages : [ 38 %] \rExcluding unnecessary pages : [ 47 %] \rExcluding unnecessary pages : [ 55 %] \rExcluding unnecessary pages : [ 63 %] \rExcluding unnecessary pages : [ 71 %] \rExcluding unnecessary pages : [ 80 %] \rExcluding unnecessary pages : [ 88 %] \rExcluding unnecessary pages : [ 96 %] \rExcluding unnecessary pages : [100 %]
> (268)
> mem_map : ffffea001d500000
> pfn_start : 860000
> pfn_end : 868000
> mem_map (269)
> mem_map : ffffea001d6c0000
> pfn_start : 868000
> pfn_end : 870000
> mem_map (270)
> mem_map : ffffea001d880000
> pfn_start : 870000
> pfn_end : 878000
> mem_map (271)
> mem_map : ffffea001da40000
> pfn_start : 878000
> pfn_end : 880000
> STEP [Excluding unnecessary pages] : 11.224292 seconds
> STEP [Excluding unnecessary pages] : 11.250834 seconds
> STEP [Copying data ] : 11.407836 seconds
> Writing erase info...
> offset_eraseinfo: 6c0eb8, size_eraseinfo: 0
>
> Original pages : 0x00000000007ec289
> Excluded pages : 0x00000000007b9efb
> Pages filled with zero : 0x0000000000000000
> Cache pages : 0x0000000000012cff
> Cache pages + private : 0x0000000000012015
> User process data pages : 0x0000000000001ece
> Free pages : 0x0000000000793319
> Remaining pages : 0x000000000003238e
> (The number of pages is reduced to 2%.)
> Memory Hole : 0x0000000000093d77
> --------------------------------------------------
> Total pages : 0x0000000000880000
>
>
> The dumpfile is saved to /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-1.
>
> makedumpfile Completed.
> [ perf record: Woken up 55 times to write data ]
> [ perf record: Captured and wrote 13.735 MB /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data1 (~600084 samples) ]
> sadump: does not have partition header
> sadump: read dump device as unknown format
> sadump: unknown format
> LOAD (0)
> phys_start : 1000000
> phys_end : 22f1000
> virt_start : ffffffff81000000
> virt_end : ffffffff822f1000
> LOAD (1)
> phys_start : 10000
> phys_end : 9b000
> virt_start : ffff880000010000
> virt_end : ffff88000009b000
> LOAD (2)
> phys_start : 100000
> phys_end : 27000000
> virt_start : ffff880000100000
> virt_end : ffff880027000000
> LOAD (3)
> phys_start : 37000000
> phys_end : 7b00d000
> virt_start : ffff880037000000
> virt_end : ffff88007b00d000
> LOAD (4)
> phys_start : 100000000
> phys_end : 880000000
> virt_start : ffff880100000000
> virt_end : ffff880880000000
> Linux kdump
> page_size : 4096
> page_size : 4096
>
> max_mapnr : 880000
>
> Buffer size for the cyclic mode: 2228224
>
> num of NODEs : 4
>
>
> Memory type : SPARSEMEM_EX
>
> mem_map (0)
> mem_map : ffffea0000000000
> pfn_start : 0
> pfn_end : 8000
> mem_map (1)
> mem_map : ffffea00001c0000
> pfn_start : 8000
> pfn_end : 10000
> mem_map (2)
> mem_map : ffffea0000380000
> pfn_start : 10000
> pfn_end : 18000
> mem_map (3)
> mem_map : ffffea0000540000
> pfn_start : 18000
> pfn_end : 20000
> mem_map (4)
> mem_map : ffffea0000700000
> pfn_start : 20000
> pfn_end : 28000
> mem_map (5)
> mem_map : ffffea00008c0000
> pfn_start : 28000
> pfn_end : 30000
> mem_map (6)
> mem_map : ffffea0000a80000
> pfn_start : 30000
> pfn_end : 38000
> mem_map (7)
> mem_map : ffffea0000c40000
> pfn_start : 38000
> pfn_end : 40000
> mem_map (8)
> mem_map : ffffea0000e00000
> pfn_start : 40000
> pfn_end : 48000
> mem_map (9)
> mem_map : ffffea0000fc0000
> pfn_start : 48000
> pfn_end : 50000
> mem_map (10)
> mem_map : ffffea0001180000
> pfn_start : 50000
> pfn_end : 58000
> mem_map (11)
> mem_map : ffffea0001340000
> pfn_start : 58000
> pfn_end : 60000
> mem_map (12)
> mem_map : ffffea0001500000
> pfn_start : 60000
> pfn_end : 68000
> mem_map (13)
> mem_map : ffffea00016c0000
> pfn_start : 68000
> pfn_end : 70000
> mem_map (14)
> mem_map : ffffea0001880000
> pfn_start : 70000
> pfn_end : 78000
> mem_map (15)
> mem_map : ffffea0001a40000
> pfn_start : 78000
> pfn_end : 80000
> mem_map (16)
> mem_map : 0
> pfn_start : 80000
> pfn_end : 88000
> mem_map (17)
> mem_map : 0
> pfn_start : 88000
> pfn_end : 90000
> mem_map (18)
> mem_map : 0
> pfn_start : 90000
> pfn_end : 98000
> mem_map (19)
> mem_map : 0
> pfn_start : 98000
> pfn_end : a0000
> mem_map (20)
> mem_map : 0
> pfn_start : a0000
> pfn_end : a8000
> mem_map (21)
> mem_map : 0
> pfn_start : a8000
> pfn_end : b0000
> mem_map (22)
> mem_map : 0
> pfn_start : b0000
> pfn_end : b8000
> mem_map (23)
> mem_map : 0
> pfn_start : b8000
> pfn_end : c0000
> mem_map (24)
> mem_map : 0
> pfn_start : c0000
> pfn_end : c8000
> mem_map (25)
> mem_map : 0
> pfn_start : c8000
> pfn_end : d0000
> mem_map (26)
> mem_map : 0
> pfn_start : d0000
> pfn_end : d8000
> mem_map (27)
> mem_map : 0
> pfn_start : d8000
> pfn_end : e0000
> mem_map (28)
> mem_map : 0
> pfn_start : e0000
> pfn_end : e8000
> mem_map (29)
> mem_map : 0
> pfn_start : e8000
> pfn_end : f0000
> mem_map (30)
> mem_map : 0
> pfn_start : f0000
> pfn_end : f8000
> mem_map (31)
> mem_map : 0
> pfn_start : f8000
> pfn_end : 100000
> mem_map (32)
> mem_map : ffffea0003800000
> pfn_start : 100000
> pfn_end : 108000
> mem_map (33)
> mem_map : ffffea00039c0000
> pfn_start : 108000
> pfn_end : 110000
> mem_map (34)
> mem_map : ffffea0003b80000
> pfn_start : 110000
> pfn_end : 118000
> mem_map (35)
> mem_map : ffffea0003d40000
> pfn_start : 118000
> pfn_end : 120000
> mem_map (36)
> mem_map : ffffea0003f00000
> pfn_start : 120000
> pfn_end : 128000
> mem_map (37)
> mem_map : ffffea00040c0000
> pfn_start : 128000
> pfn_end : 130000
> mem_map (38)
> mem_map : ffffea0004280000
> pfn_start : 130000
> pfn_end : 138000
> mem_map (39)
> mem_map : ffffea0004440000
> pfn_start : 138000
> pfn_end : 140000
> mem_map (40)
> mem_map : ffffea0004600000
> pfn_start : 140000
> pfn_end : 148000
> mem_map (41)
> mem_map : ffffea00047c0000
> pfn_start : 148000
> pfn_end : 150000
> mem_map (42)
> mem_map : ffffea0004980000
> pfn_start : 150000
> pfn_end : 158000
> mem_map (43)
> mem_map : ffffea0004b40000
> pfn_start : 158000
> pfn_end : 160000
> mem_map (44)
> mem_map : ffffea0004d00000
> pfn_start : 160000
> pfn_end : 168000
> mem_map (45)
> mem_map : ffffea0004ec0000
> pfn_start : 168000
> pfn_end : 170000
> mem_map (46)
> mem_map : ffffea0005080000
> pfn_start : 170000
> pfn_end : 178000
> mem_map (47)
> mem_map : ffffea0005240000
> pfn_start : 178000
> pfn_end : 180000
> mem_map (48)
> mem_map : ffffea0005400000
> pfn_start : 180000
> pfn_end : 188000
> mem_map (49)
> mem_map : ffffea00055c0000
> pfn_start : 188000
> pfn_end : 190000
> mem_map (50)
> mem_map : ffffea0005780000
> pfn_start : 190000
> pfn_end : 198000
> mem_map (51)
> mem_map : ffffea0005940000
> pfn_start : 198000
> pfn_end : 1a0000
> mem_map (52)
> mem_map : ffffea0005b00000
> pfn_start : 1a0000
> pfn_end : 1a8000
> mem_map (53)
> mem_map : ffffea0005cc0000
> pfn_start : 1a8000
> pfn_end : 1b0000
> mem_map (54)
> mem_map : ffffea0005e80000
> pfn_start : 1b0000
> pfn_end : 1b8000
> mem_map (55)
> mem_map : ffffea0006040000
> pfn_start : 1b8000
> pfn_end : 1c0000
> mem_map (56)
> mem_map : ffffea0006200000
> pfn_start : 1c0000
> pfn_end : 1c8000
> mem_map (57)
> mem_map : ffffea00063c0000
> pfn_start : 1c8000
> pfn_end : 1d0000
> mem_map (58)
> mem_map : ffffea0006580000
> pfn_start : 1d0000
> pfn_end : 1d8000
> mem_map (59)
> mem_map : ffffea0006740000
> pfn_start : 1d8000
> pfn_end : 1e0000
> mem_map (60)
> mem_map : ffffea0006900000
> pfn_start : 1e0000
> pfn_end : 1e8000
> mem_map (61)
> mem_map : ffffea0006ac0000
> pfn_start : 1e8000
> pfn_end : 1f0000
> mem_map (62)
> mem_map : ffffea0006c80000
> pfn_start : 1f0000
> pfn_end : 1f8000
> mem_map (63)
> mem_map : ffffea0006e40000
> pfn_start : 1f8000
> pfn_end : 200000
> mem_map (64)
> mem_map : ffffea0007000000
> pfn_start : 200000
> pfn_end : 208000
> mem_map (65)
> mem_map : ffffea00071c0000
> pfn_start : 208000
> pfn_end : 210000
> mem_map (66)
> mem_map : ffffea0007380000
> pfn_start : 210000
> pfn_end : 218000
> mem_map (67)
> mem_map : ffffea0007540000
> pfn_start : 218000
> pfn_end : 220000
> mem_map (68)
> mem_map : ffffea0007700000
> pfn_start : 220000
> pfn_end : 228000
> mem_map (69)
> mem_map : ffffea00078c0000
> pfn_start : 228000
> pfn_end : 230000
> mem_map (70)
> mem_map : ffffea0007a80000
> pfn_start : 230000
> pfn_end : 238000
> mem_map (71)
> mem_map : ffffea0007c40000
> pfn_start : 238000
> pfn_end : 240000
> mem_map (72)
> mem_map : ffffea0007e00000
> pfn_start : 240000
> pfn_end : 248000
> mem_map (73)
> mem_map : ffffea0007fc0000
> pfn_start : 248000
> pfn_end : 250000
> mem_map (74)
> mem_map : ffffea0008180000
> pfn_start : 250000
> pfn_end : 258000
> mem_map (75)
> mem_map : ffffea0008340000
> pfn_start : 258000
> pfn_end : 260000
> mem_map (76)
> mem_map : ffffea0008500000
> pfn_start : 260000
> pfn_end : 268000
> mem_map (77)
> mem_map : ffffea00086c0000
> pfn_start : 268000
> pfn_end : 270000
> mem_map (78)
> mem_map : ffffea0008880000
> pfn_start : 270000
> pfn_end : 278000
> mem_map (79)
> mem_map : ffffea0008a40000
> pfn_start : 278000
> pfn_end : 280000
> mem_map (80)
> mem_map : ffffea0008c00000
> pfn_start : 280000
> pfn_end : 288000
> mem_map (81)
> mem_map : ffffea0008dc0000
> pfn_start : 288000
> pfn_end : 290000
> mem_map (82)
> mem_map : ffffea0008f80000
> pfn_start : 290000
> pfn_end : 298000
> mem_map (83)
> mem_map : ffffea0009140000
> pfn_start : 298000
> pfn_end : 2a0000
> mem_map (84)
> mem_map : ffffea0009300000
> pfn_start : 2a0000
> pfn_end : 2a8000
> mem_map (85)
> mem_map : ffffea00094c0000
> pfn_start : 2a8000
> pfn_end : 2b0000
> mem_map (86)
> mem_map : ffffea0009680000
> pfn_start : 2b0000
> pfn_end : 2b8000
> mem_map (87)
> mem_map : ffffea0009840000
> pfn_start : 2b8000
> pfn_end : 2c0000
> mem_map (88)
> mem_map : ffffea0009a00000
> pfn_start : 2c0000
> pfn_end : 2c8000
> mem_map (89)
> mem_map : ffffea0009bc0000
> pfn_start : 2c8000
> pfn_end : 2d0000
> mem_map (90)
> mem_map : ffffea0009d80000
> pfn_start : 2d0000
> pfn_end : 2d8000
> mem_map (91)
> mem_map : ffffea0009f40000
> pfn_start : 2d8000
> pfn_end : 2e0000
> mem_map (92)
> mem_map : ffffea000a100000
> pfn_start : 2e0000
> pfn_end : 2e8000
> mem_map (93)
> mem_map : ffffea000a2c0000
> pfn_start : 2e8000
> pfn_end : 2f0000
> mem_map (94)
> mem_map : ffffea000a480000
> pfn_start : 2f0000
> pfn_end : 2f8000
> mem_map (95)
> mem_map : ffffea000a640000
> pfn_start : 2f8000
> pfn_end : 300000
> mem_map (96)
> mem_map : ffffea000a800000
> pfn_start : 300000
> pfn_end : 308000
> mem_map (97)
> mem_map : ffffea000a9c0000
> pfn_start : 308000
> pfn_end : 310000
> mem_map (98)
> mem_map : ffffea000ab80000
> pfn_start : 310000
> pfn_end : 318000
> mem_map (99)
> mem_map : ffffea000ad40000
> pfn_start : 318000
> pfn_end : 320000
> mem_map (100)
> mem_map : ffffea000af00000
> pfn_start : 320000
> pfn_end : 328000
> mem_map (101)
> mem_map : ffffea000b0c0000
> pfn_start : 328000
> pfn_end : 330000
> mem_map (102)
> mem_map : ffffea000b280000
> pfn_start : 330000
> pfn_end : 338000
> mem_map (103)
> mem_map : ffffea000b440000
> pfn_start : 338000
> pfn_end : 340000
> mem_map (104)
> mem_map : ffffea000b600000
> pfn_start : 340000
> pfn_end : 348000
> mem_map (105)
> mem_map : ffffea000b7c0000
> pfn_start : 348000
> pfn_end : 350000
> mem_map (106)
> mem_map : ffffea000b980000
> pfn_start : 350000
> pfn_end : 358000
> mem_map (107)
> mem_map : ffffea000bb40000
> pfn_start : 358000
> pfn_end : 360000
> mem_map (108)
> mem_map : ffffea000bd00000
> pfn_start : 360000
> pfn_end : 368000
> mem_map (109)
> mem_map : ffffea000bec0000
> pfn_start : 368000
> pfn_end : 370000
> mem_map (110)
> mem_map : ffffea000c080000
> pfn_start : 370000
> pfn_end : 378000
> mem_map (111)
> mem_map : ffffea000c240000
> pfn_start : 378000
> pfn_end : 380000
> mem_map (112)
> mem_map : ffffea000c400000
> pfn_start : 380000
> pfn_end : 388000
> mem_map (113)
> mem_map : ffffea000c5c0000
> pfn_start : 388000
> pfn_end : 390000
> mem_map (114)
> mem_map : ffffea000c780000
> pfn_start : 390000
> pfn_end : 398000
> mem_map (115)
> mem_map : ffffea000c940000
> pfn_start : 398000
> pfn_end : 3a0000
> mem_map (116)
> mem_map : ffffea000cb00000
> pfn_start : 3a0000
> pfn_end : 3a8000
> mem_map (117)
> mem_map : ffffea000ccc0000
> pfn_start : 3a8000
> pfn_end : 3b0000
> mem_map (118)
> mem_map : ffffea000ce80000
> pfn_start : 3b0000
> pfn_end : 3b8000
> mem_map (119)
> mem_map : ffffea000d040000
> pfn_start : 3b8000
> pfn_end : 3c0000
> mem_map (120)
> mem_map : ffffea000d200000
> pfn_start : 3c0000
> pfn_end : 3c8000
> mem_map (121)
> mem_map : ffffea000d3c0000
> pfn_start : 3c8000
> pfn_end : 3d0000
> mem_map (122)
> mem_map : ffffea000d580000
> pfn_start : 3d0000
> pfn_end : 3d8000
> mem_map (123)
> mem_map : ffffea000d740000
> pfn_start : 3d8000
> pfn_end : 3e0000
> mem_map (124)
> mem_map : ffffea000d900000
> pfn_start : 3e0000
> pfn_end : 3e8000
> mem_map (125)
> mem_map : ffffea000dac0000
> pfn_start : 3e8000
> pfn_end : 3f0000
> mem_map (126)
> mem_map : ffffea000dc80000
> pfn_start : 3f0000
> pfn_end : 3f8000
> mem_map (127)
> mem_map : ffffea000de40000
> pfn_start : 3f8000
> pfn_end : 400000
> mem_map (128)
> mem_map : ffffea000e000000
> pfn_start : 400000
> pfn_end : 408000
> mem_map (129)
> mem_map : ffffea000e1c0000
> pfn_start : 408000
> pfn_end : 410000
> mem_map (130)
> mem_map : ffffea000e380000
> pfn_start : 410000
> pfn_end : 418000
> mem_map (131)
> mem_map : ffffea000e540000
> pfn_start : 418000
> pfn_end : 420000
> mem_map (132)
> mem_map : ffffea000e700000
> pfn_start : 420000
> pfn_end : 428000
> mem_map (133)
> mem_map : ffffea000e8c0000
> pfn_start : 428000
> pfn_end : 430000
> mem_map (134)
> mem_map : ffffea000ea80000
> pfn_start : 430000
> pfn_end : 438000
> mem_map (135)
> mem_map : ffffea000ec40000
> pfn_start : 438000
> pfn_end : 440000
> mem_map (136)
> mem_map : ffffea000ee00000
> pfn_start : 440000
> pfn_end : 448000
> mem_map (137)
> mem_map : ffffea000efc0000
> pfn_start : 448000
> pfn_end : 450000
> mem_map (138)
> mem_map : ffffea000f180000
> pfn_start : 450000
> pfn_end : 458000
> mem_map (139)
> mem_map : ffffea000f340000
> pfn_start : 458000
> pfn_end : 460000
> mem_map (140)
> mem_map : ffffea000f500000
> pfn_start : 460000
> pfn_end : 468000
> mem_map (141)
> mem_map : ffffea000f6c0000
> pfn_start : 468000
> pfn_end : 470000
> mem_map (142)
> mem_map : ffffea000f880000
> pfn_start : 470000
> pfn_end : 478000
> mem_map (143)
> mem_map : ffffea000fa40000
> pfn_start : 478000
> pfn_end : 480000
> mem_map (144)
> mem_map : ffffea000fc00000
> pfn_start : 480000
> pfn_end : 488000
> mem_map (145)
> mem_map : ffffea000fdc0000
> pfn_start : 488000
> pfn_end : 490000
> mem_map (146)
> mem_map : ffffea000ff80000
> pfn_start : 490000
> pfn_end : 498000
> mem_map (147)
> mem_map : ffffea0010140000
> pfn_start : 498000
> pfn_end : 4a0000
> mem_map (148)
> mem_map : ffffea0010300000
> pfn_start : 4a0000
> pfn_end : 4a8000
> mem_map (149)
> mem_map : ffffea00104c0000
> pfn_start : 4a8000
> pfn_end : 4b0000
> mem_map (150)
> mem_map : ffffea0010680000
> pfn_start : 4b0000
> pfn_end : 4b8000
> mem_map (151)
> mem_map : ffffea0010840000
> pfn_start : 4b8000
> pfn_end : 4c0000
> mem_map (152)
> mem_map : ffffea0010a00000
> pfn_start : 4c0000
> pfn_end : 4c8000
> mem_map (153)
> mem_map : ffffea0010bc0000
> pfn_start : 4c8000
> pfn_end : 4d0000
> mem_map (154)
> mem_map : ffffea0010d80000
> pfn_start : 4d0000
> pfn_end : 4d8000
> mem_map (155)
> mem_map : ffffea0010f40000
> pfn_start : 4d8000
> pfn_end : 4e0000
> mem_map (156)
> mem_map : ffffea0011100000
> pfn_start : 4e0000
> pfn_end : 4e8000
> mem_map (157)
> mem_map : ffffea00112c0000
> pfn_start : 4e8000
> pfn_end : 4f0000
> mem_map (158)
> mem_map : ffffea0011480000
> pfn_start : 4f0000
> pfn_end : 4f8000
> mem_map (159)
> mem_map : ffffea0011640000
> pfn_start : 4f8000
> pfn_end : 500000
> mem_map (160)
> mem_map : ffffea0011800000
> pfn_start : 500000
> pfn_end : 508000
> mem_map (161)
> mem_map : ffffea00119c0000
> pfn_start : 508000
> pfn_end : 510000
> mem_map (162)
> mem_map : ffffea0011b80000
> pfn_start : 510000
> pfn_end : 518000
> mem_map (163)
> mem_map : ffffea0011d40000
> pfn_start : 518000
> pfn_end : 520000
> mem_map (164)
> mem_map : ffffea0011f00000
> pfn_start : 520000
> pfn_end : 528000
> mem_map (165)
> mem_map : ffffea00120c0000
> pfn_start : 528000
> pfn_end : 530000
> mem_map (166)
> mem_map : ffffea0012280000
> pfn_start : 530000
> pfn_end : 538000
> mem_map (167)
> mem_map : ffffea0012440000
> pfn_start : 538000
> pfn_end : 540000
> mem_map (168)
> mem_map : ffffea0012600000
> pfn_start : 540000
> pfn_end : 548000
> mem_map (169)
> mem_map : ffffea00127c0000
> pfn_start : 548000
> pfn_end : 550000
> mem_map (170)
> mem_map : ffffea0012980000
> pfn_start : 550000
> pfn_end : 558000
> mem_map (171)
> mem_map : ffffea0012b40000
> pfn_start : 558000
> pfn_end : 560000
> mem_map (172)
> mem_map : ffffea0012d00000
> pfn_start : 560000
> pfn_end : 568000
> mem_map (173)
> mem_map : ffffea0012ec0000
> pfn_start : 568000
> pfn_end : 570000
> mem_map (174)
> mem_map : ffffea0013080000
> pfn_start : 570000
> pfn_end : 578000
> mem_map (175)
> mem_map : ffffea0013240000
> pfn_start : 578000
> pfn_end : 580000
> mem_map (176)
> mem_map : ffffea0013400000
> pfn_start : 580000
> pfn_end : 588000
> mem_map (177)
> mem_map : ffffea00135c0000
> pfn_start : 588000
> pfn_end : 590000
> mem_map (178)
> mem_map : ffffea0013780000
> pfn_start : 590000
> pfn_end : 598000
> mem_map (179)
> mem_map : ffffea0013940000
> pfn_start : 598000
> pfn_end : 5a0000
> mem_map (180)
> mem_map : ffffea0013b00000
> pfn_start : 5a0000
> pfn_end : 5a8000
> mem_map (181)
> mem_map : ffffea0013cc0000
> pfn_start : 5a8000
> pfn_end : 5b0000
> mem_map (182)
> mem_map : ffffea0013e80000
> pfn_start : 5b0000
> pfn_end : 5b8000
> mem_map (183)
> mem_map : ffffea0014040000
> pfn_start : 5b8000
> pfn_end : 5c0000
> mem_map (184)
> mem_map : ffffea0014200000
> pfn_start : 5c0000
> pfn_end : 5c8000
> mem_map (185)
> mem_map : ffffea00143c0000
> pfn_start : 5c8000
> pfn_end : 5d0000
> mem_map (186)
> mem_map : ffffea0014580000
> pfn_start : 5d0000
> pfn_end : 5d8000
> mem_map (187)
> mem_map : ffffea0014740000
> pfn_start : 5d8000
> pfn_end : 5e0000
> mem_map (188)
> mem_map : ffffea0014900000
> pfn_start : 5e0000
> pfn_end : 5e8000
> mem_map (189)
> mem_map : ffffea0014ac0000
> pfn_start : 5e8000
> pfn_end : 5f0000
> mem_map (190)
> mem_map : ffffea0014c80000
> pfn_start : 5f0000
> pfn_end : 5f8000
> mem_map (191)
> mem_map : ffffea0014e40000
> pfn_start : 5f8000
> pfn_end : 600000
> mem_map (192)
> mem_map : ffffea0015000000
> pfn_start : 600000
> pfn_end : 608000
> mem_map (193)
> mem_map : ffffea00151c0000
> pfn_start : 608000
> pfn_end : 610000
> mem_map (194)
> mem_map : ffffea0015380000
> pfn_start : 610000
> pfn_end : 618000
> mem_map (195)
> mem_map : ffffea0015540000
> pfn_start : 618000
> pfn_end : 620000
> mem_map (196)
> mem_map : ffffea0015700000
> pfn_start : 620000
> pfn_end : 628000
> mem_map (197)
> mem_map : ffffea00158c0000
> pfn_start : 628000
> pfn_end : 630000
> mem_map (198)
> mem_map : ffffea0015a80000
> pfn_start : 630000
> pfn_end : 638000
> mem_map (199)
> mem_map : ffffea0015c40000
> pfn_start : 638000
> pfn_end : 640000
> mem_map (200)
> mem_map : ffffea0015e00000
> pfn_start : 640000
> pfn_end : 648000
> mem_map (201)
> mem_map : ffffea0015fc0000
> pfn_start : 648000
> pfn_end : 650000
> mem_map (202)
> mem_map : ffffea0016180000
> pfn_start : 650000
> pfn_end : 658000
> mem_map (203)
> mem_map : ffffea0016340000
> pfn_start : 658000
> pfn_end : 660000
> mem_map (204)
> mem_map : ffffea0016500000
> pfn_start : 660000
> pfn_end : 668000
> mem_map (205)
> mem_map : ffffea00166c0000
> pfn_start : 668000
> pfn_end : 670000
> mem_map (206)
> mem_map : ffffea0016880000
> pfn_start : 670000
> pfn_end : 678000
> mem_map (207)
> mem_map : ffffea0016a40000
> pfn_start : 678000
> pfn_end : 680000
> mem_map (208)
> mem_map : ffffea0016c00000
> pfn_start : 680000
> pfn_end : 688000
> mem_map (209)
> mem_map : ffffea0016dc0000
> pfn_start : 688000
> pfn_end : 690000
> mem_map (210)
> mem_map : ffffea0016f80000
> pfn_start : 690000
> pfn_end : 698000
> mem_map (211)
> mem_map : ffffea0017140000
> pfn_start : 698000
> pfn_end : 6a0000
> mem_map (212)
> mem_map : ffffea0017300000
> pfn_start : 6a0000
> pfn_end : 6a8000
> mem_map (213)
> mem_map : ffffea00174c0000
> pfn_start : 6a8000
> pfn_end : 6b0000
> mem_map (214)
> mem_map : ffffea0017680000
> pfn_start : 6b0000
> pfn_end : 6b8000
> mem_map (215)
> mem_map : ffffea0017840000
> pfn_start : 6b8000
> pfn_end : 6c0000
> mem_map (216)
> mem_map : ffffea0017a00000
> pfn_start : 6c0000
> pfn_end : 6c8000
> mem_map (217)
> mem_map : ffffea0017bc0000
> pfn_start : 6c8000
> pfn_end : 6d0000
> mem_map (218)
> mem_map : ffffea0017d80000
> pfn_start : 6d0000
> pfn_end : 6d8000
> mem_map (219)
> mem_map : ffffea0017f40000
> pfn_start : 6d8000
> pfn_end : 6e0000
> mem_map (220)
> mem_map : ffffea0018100000
> pfn_start : 6e0000
> pfn_end : 6e8000
> mem_map (221)
> mem_map : ffffea00182c0000
> pfn_start : 6e8000
> pfn_end : 6f0000
> mem_map (222)
> mem_map : ffffea0018480000
> pfn_start : 6f0000
> pfn_end : 6f8000
> mem_map (223)
> mem_map : ffffea0018640000
> pfn_start : 6f8000
> pfn_end : 700000
> mem_map (224)
> mem_map : ffffea0018800000
> pfn_start : 700000
> pfn_end : 708000
> mem_map (225)
> mem_map : ffffea00189c0000
> pfn_start : 708000
> pfn_end : 710000
> mem_map (226)
> mem_map : ffffea0018b80000
> pfn_start : 710000
> pfn_end : 718000
> mem_map (227)
> mem_map : ffffea0018d40000
> pfn_start : 718000
> pfn_end : 720000
> mem_map (228)
> mem_map : ffffea0018f00000
> pfn_start : 720000
> pfn_end : 728000
> mem_map (229)
> mem_map : ffffea00190c0000
> pfn_start : 728000
> pfn_end : 730000
> mem_map (230)
> mem_map : ffffea0019280000
> pfn_start : 730000
> pfn_end : 738000
> mem_map (231)
> mem_map : ffffea0019440000
> pfn_start : 738000
> pfn_end : 740000
> mem_map (232)
> mem_map : ffffea0019600000
> pfn_start : 740000
> pfn_end : 748000
> mem_map (233)
> mem_map : ffffea00197c0000
> pfn_start : 748000
> pfn_end : 750000
> mem_map (234)
> mem_map : ffffea0019980000
> pfn_start : 750000
> pfn_end : 758000
> mem_map (235)
> mem_map : ffffea0019b40000
> pfn_start : 758000
> pfn_end : 760000
> mem_map (236)
> mem_map : ffffea0019d00000
> pfn_start : 760000
> pfn_end : 768000
> mem_map (237)
> mem_map : ffffea0019ec0000
> pfn_start : 768000
> pfn_end : 770000
> mem_map (238)
> mem_map : ffffea001a080000
> pfn_start : 770000
> pfn_end : 778000
> mem_map (239)
> mem_map : ffffea001a240000
> pfn_start : 778000
> pfn_end : 780000
> mem_map (240)
> mem_map : ffffea001a400000
> pfn_start : 780000
> pfn_end : 788000
> mem_map (241)
> mem_map : ffffea001a5c0000
> pfn_start : 788000
> pfn_end : 790000
> mem_map (242)
> mem_map : ffffea001a780000
> pfn_start : 790000
> pfn_end : 798000
> mem_map (243)
> mem_map : ffffea001a940000
> pfn_start : 798000
> pfn_end : 7a0000
> mem_map (244)
> mem_map : ffffea001ab00000
> pfn_start : 7a0000
> pfn_end : 7a8000
> mem_map (245)
> mem_map : ffffea001acc0000
> pfn_start : 7a8000
> pfn_end : 7b0000
> mem_map (246)
> mem_map : ffffea001ae80000
> pfn_start : 7b0000
> pfn_end : 7b8000
> mem_map (247)
> mem_map : ffffea001b040000
> pfn_start : 7b8000
> pfn_end : 7c0000
> mem_map (248)
> mem_map : ffffea001b200000
> pfn_start : 7c0000
> pfn_end : 7c8000
> mem_map (249)
> mem_map : ffffea001b3c0000
> pfn_start : 7c8000
> pfn_end : 7d0000
> mem_map (250)
> mem_map : ffffea001b580000
> pfn_start : 7d0000
> pfn_end : 7d8000
> mem_map (251)
> mem_map : ffffea001b740000
> pfn_start : 7d8000
> pfn_end : 7e0000
> mem_map (252)
> mem_map : ffffea001b900000
> pfn_start : 7e0000
> pfn_end : 7e8000
> mem_map (253)
> mem_map : ffffea001bac0000
> pfn_start : 7e8000
> pfn_end : 7f0000
> mem_map (254)
> mem_map : ffffea001bc80000
> pfn_start : 7f0000
> pfn_end : 7f8000
> mem_map (255)
> mem_map : ffffea001be40000
> pfn_start : 7f8000
> pfn_end : 800000
> mem_map (256)
> mem_map : ffffea001c000000
> pfn_start : 800000
> pfn_end : 808000
> mem_map (257)
> mem_map : ffffea001c1c0000
> pfn_start : 808000
> pfn_end : 810000
> mem_map (258)
> mem_map : ffffea001c380000
> pfn_start : 810000
> pfn_end : 818000
> mem_map (259)
> mem_map : ffffea001c540000
> pfn_start : 818000
> pfn_end : 820000
> mem_map (260)
> mem_map : ffffea001c700000
> pfn_start : 820000
> pfn_end : 828000
> mem_map (261)
> mem_map : ffffea001c8c0000
> pfn_start : 828000
> pfn_end : 830000
> mem_map (262)
> mem_map : ffffea001ca80000
> pfn_start : 830000
> pfn_end : 838000
> mem_map (263)
> mem_map : ffffea001cc40000
> pfn_start : 838000
> pfn_end : 840000
> mem_map (264)
> mem_map : ffffea001ce00000
> pfn_start : 840000
> pfn_end : 848000
> mem_map (265)
> mem_map : ffffea001cfc0000
> pfn_start : 848000
> pfn_end : 850000
> mem_map (266)
> mem_map : ffffea001d180000
> pfn_start : 850000
> pfn_end : 858000
> mem_map (267)
> mem_map : ffffea001d340000
> pfn_start : 858000
> pfn_end : 860000
> mem_map\rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [100 %] \rExcluding unnecessary pages : [ 0 %] \rExcluding unnecessary pages : [100 %]
> (268)
> mem_map : ffffea001d500000
> pfn_start : 860000
> pfn_end : 868000
> mem_map (269)
> mem_map : ffffea001d6c0000
> pfn_start : 868000
> pfn_end : 870000
> mem_map (270)
> mem_map : ffffea001d880000
> pfn_start : 870000
> pfn_end : 878000
> mem_map (271)
> mem_map : ffffea001da40000
> pfn_start : 878000
> pfn_end : 880000
> STEP [Excluding unnecessary pages] : 0.438936 seconds
> STEP [Excluding unnecessary pages] : 0.467304 seconds
> STEP [Copying data ] : 0.624328 seconds
> Writing erase info...
> offset_eraseinfo: 6c0eb8, size_eraseinfo: 0
>
> Original pages : 0x00000000007ec289
> Excluded pages : 0x00000000007b9efb
> Pages filled with zero : 0x0000000000000000
> Cache pages : 0x0000000000012cff
> Cache pages + private : 0x0000000000012015
> User process data pages : 0x0000000000001ece
> Free pages : 0x0000000000793319
> Remaining pages : 0x000000000003238e
> (The number of pages is reduced to 2%.)
> Memory Hole : 0x0000000000093d77
> --------------------------------------------------
> Total pages : 0x0000000000880000
>
>
> The dumpfile is saved to /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-2.
>
> makedumpfile Completed.
> [ perf record: Woken up 3 times to write data ]
> [ perf record: Captured and wrote 0.598 MB /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data2 (~26144 samples) ]
> Failed to open [ext4], continuing without symbols
> No kallsyms or vmlinux with build-id a77a2293aab413880b8b361bb5b863a1680c8eab was found
> [qla2xxx] with build id a77a2293aab413880b8b361bb5b863a1680c8eab not found, continuing without symbols
> Failed to open [dm_mirror], continuing without symbols
> No kallsyms or vmlinux with build-id 8e4a472eadb14fb0cde985ef8571b543880472dd was found
> [megaraid_sas] with build id 8e4a472eadb14fb0cde985ef8571b543880472dd not found, continuing without symbols
> No kallsyms or vmlinux with build-id 93346fc362be38e207aeaae310a339fb502d9acb was found
> [jbd2] with build id 93346fc362be38e207aeaae310a339fb502d9acb not found, continuing without symbols
> # ========
> # captured on: Fri Dec 7 16:45:43 2012
> # hostname : (none)
> # os release : 3.7.0-rc8-cliff-bench+
> # perf version : 3.7.rc8.3.ge0fb22
> # arch : x86_64
> # nrcpus online : 1
> # nrcpus avail : 1
> # cpudesc : Intel(R) Xeon(R) CPU E7- 4820 @ 2.00GHz
> # cpuid : GenuineIntel,6,47,2
> # total memory : 240104 kB
> # cmdline : /var/crash/perf record -g -o /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data1 /var/crash/makedumpfile-cliff --message-level 31 -i /var/crash/vmcoreinfo.txt -N -o -d 31 /proc/vmcore /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-1
> # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 2 }
> # HEADER_CPU_TOPOLOGY info available, use -I to display
> # HEADER_NUMA_TOPOLOGY info available, use -I to display
> # pmu mappings: cpu = 4, software = 1, tracepoint = 2, uncore_bbox_0 = 15, uncore_bbox_1 = 16, uncore_cbox_0 = 7, uncore_cbox_1 = 8, uncore_cbox_2 = 9, uncore_cbox_3 = 10, uncore_cbox_4 = 11, uncore_cbox_5 = 12, uncore_cbox_6 = 13, uncore_cbox_7 = 14, uncore_mbox_0 = 19, uncore_mbox_1 = 20, uncore_rbox_0 = 21, uncore_rbox_1 = 22, uncore_sbox_0 = 17, uncore_sbox_1 = 18, breakpoint = 5, uncore_ubox = 6, uncore_wbox = 23
> # ========
> #
> # Samples: 91K of event 'cycles'
> # Event count (approx.): 23676246537
> #
> # Overhead Command Shared Object
> # ........ ............... ....................
> #
> 90.38% makedumpfile-cl [kernel.kallsyms]
> |
> |--19.73%-- __purge_vmap_area_lazy
> | |
> | |--80.50%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--66.59%-- 0x0
> | | |
> | | --33.41%-- 0x45524f4300000001
> | |
> | |--19.43%-- vm_unmap_aliases
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.07%-- [...]
> |
> |--15.58%-- try_preserve_large_page
> | |
> | |--99.97%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.03%-- [...]
> |
> |--14.51%-- iomem_map_sanity_check
> | |
> | |--99.97%-- __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.01%-- 0x6e6d2f0065726f63
> | | |
> | | --49.99%-- 0x45524f4300000001
> | --0.03%-- [...]
> |
> |--11.06%-- walk_system_ram_range
> | |
> | |--64.71%-- pat_pagerange_is_ram
> | | |
> | | |--50.87%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | --49.13%-- reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--34.75%-- page_is_ram
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.54%-- [...]
> |
> |--4.84%-- __phys_addr
> | |
> | |--52.48%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--45.72%-- try_preserve_large_page
> | | __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --1.80%-- [...]
> |
> |--4.82%-- __get_vm_area_node
> | |
> | |--99.70%-- get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | --0.30%-- [...]
> |
> |--4.13%-- iounmap
> | |
> | |--99.59%-- copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.39%-- 0x45524f4300000001
> | | |
> | | --49.61%-- 0x0
> | --0.41%-- [...]
> |
> |--3.60%-- read_vmcore
> | |
> | |--99.83%-- proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.17%-- [...]
> |
> |--2.24%-- copy_user_generic_string
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.92%-- remove_vm_area
> | |
> | |--99.31%-- iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | |
> | --0.69%-- copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.82%-- do_kernel_range_flush
> | |
> | |--99.20%-- on_each_cpu
> | | flush_tlb_kernel_range
> | | __purge_vmap_area_lazy
> | | free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --0.80%-- flush_tlb_kernel_range
> | __purge_vmap_area_lazy
> | free_vmap_area_noflush
> | free_unmap_vmap_area
> | remove_vm_area
> | iounmap
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--1.01%-- rbt_memtype_erase
> | |
> | |--96.66%-- free_memtype
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --3.34%-- iounmap
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.87%-- kfree
> | |
> | |--55.52%-- free_memtype
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--29.00%-- iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--12.42%-- rcu_do_batch
> | | __rcu_process_callbacks
> | | rcu_process_callbacks
> | | __do_softirq
> | | call_softirq
> | | do_softirq
> | | irq_exit
> | | smp_apic_timer_interrupt
> | | apic_timer_interrupt
> | | |
> | | |--20.23%-- free_vmap_area_noflush
> | | | free_unmap_vmap_area
> | | | remove_vm_area
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--19.11%-- __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--16.82%-- __change_page_attr
> | | | __change_page_attr_set_clr
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--6.75%-- pat_pagerange_is_ram
> | | | |
> | | | |--66.67%-- reserve_memtype
> | | | | __ioremap_caller
> | | | | ioremap_cache
> | | | | copy_oldmem_page
> | | | | read_from_oldmem
> | | | | read_vmcore
> | | | | proc_reg_read
> | | | | vfs_read
> | | | | sys_read
> | | | | system_call_fastpath
> | | | | __read_nocancel
> | | | |
> | | | --33.33%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--5.62%-- vm_unmap_aliases
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--4.50%-- proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--4.49%-- copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--3.37%-- get_vm_area_caller
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--3.37%-- readmem
> | | |
> | | |--2.25%-- page_is_ram
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--2.25%-- __exclude_unnecessary_pages
> | | | exclude_unnecessary_pages_cyclic
> | | | writeout_dumpfile
> | | | 0x7fff6c26de6d
> | | | 0x64656b616d2f6873
> | | |
> | | |--2.25%-- paddr_to_offset
> | | | exclude_unnecessary_pages_cyclic
> | | | |
> | | | --100.00%-- writeout_dumpfile
> | | | 0x7fff6c26de6d
> | | | 0x64656b616d2f6873
> | | |
> | | |--1.13%-- try_preserve_large_page
> | | | __change_page_attr
> | | | __change_page_attr_set_clr
> | | | change_page_attr_set_clr
> | | | _set_memory_wb
> | | | ioremap_change_attr
> | | | kernel_map_sync_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- reserve_memtype
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- __lseek_nocancel
> | | |
> | | |--1.12%-- proc_reg_llseek
> | | | vfs_llseek
> | | | sys_lseek
> | | | system_call_fastpath
> | | | __lseek_nocancel
> | | |
> | | |--1.12%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- on_each_cpu
> | | | flush_tlb_kernel_range
> | | | __purge_vmap_area_lazy
> | | | free_vmap_area_noflush
> | | | free_unmap_vmap_area
> | | | remove_vm_area
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | |--1.12%-- __get_vm_area_node
> | | | get_vm_area_caller
> | | | __ioremap_caller
> | | | ioremap_cache
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | |
> | | --1.12%-- vtop4_x86_64
> | |
> | |--2.09%-- copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --0.98%-- __rcu_process_callbacks
> | rcu_process_callbacks
> | __do_softirq
> | call_softirq
> | do_softirq
> | irq_exit
> | smp_apic_timer_interrupt
> | apic_timer_interrupt
> | |
> | |--57.11%-- __change_page_attr
> | | __change_page_attr_set_clr
> | | change_page_attr_set_clr
> | | _set_memory_wb
> | | ioremap_change_attr
> | | kernel_map_sync_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--14.30%-- flush_tlb_kernel_range
> | | __purge_vmap_area_lazy
> | | free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--14.30%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --14.30%-- copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.58%-- __insert_vmap_area
> | |
> | |--98.32%-- alloc_vmap_area
> | | __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --1.68%-- __get_vm_area_node
> | get_vm_area_caller
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.57%-- kmem_cache_alloc_node_trace
> | |
> | |--55.58%-- __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | |--41.85%-- alloc_vmap_area
> | | __get_vm_area_node
> | | get_vm_area_caller
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --2.56%-- get_vm_area_caller
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.54%-- vfs_read
> | |
> | |--98.21%-- sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | --100.00%-- 0x0
> | |
> | --1.79%-- system_call_fastpath
> | __read_nocancel
> |
> |--0.54%-- memtype_rb_check_conflict
> | |
> | |--95.54%-- rbt_memtype_check_insert
> | | reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --4.46%-- reserve_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.51%-- __mtrr_type_lookup
> | |
> | |--96.91%-- mtrr_type_lookup
> | | reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | |
> | --3.09%-- reserve_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> --11.15%-- [...]
>
> 9.19% makedumpfile-cl makedumpfile-cliff
> |
> |--37.97%-- __exclude_unnecessary_pages
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--18.73%-- set_bitmap_cyclic
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--13.79%-- paddr_to_offset
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--4.71%-- readmem
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--4.12%-- get_num_dumpable_cyclic
> |
> |--2.90%-- is_in_same_page
> |
> |--2.66%-- page_is_buddy_v3
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.37%-- clear_bit_on_2nd_bitmap_for_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.35%-- create_1st_bitmap_cyclic
> |
> |--2.04%-- is_xen_memory
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--2.02%-- vtop4_x86_64
> |
> |--1.67%-- set_bit_on_1st_bitmap
> |
> |--1.53%-- clear_bit_on_2nd_bitmap
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--1.25%-- write_kdump_pages_and_bitmap_cyclic
> | writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--1.15%-- update_cyclic_region
> |
> |--0.66%-- vaddr_to_paddr_x86_64
> --0.07%-- [...]
>
> 0.42% makedumpfile-cl libc.so.6
> |
> |--40.25%-- __lseek_nocancel
> |
> |--36.91%-- __read_nocancel
> |
> |--8.64%-- __GI___libc_read
> |
> |--5.01%-- __memset_sse2
> | |
> | --100.00%-- 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--3.90%-- __GI___libc_lseek64
> |
> |--3.72%-- memcpy
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff6c26de6d
> | 0x64656b616d2f6873
> |
> |--0.53%-- memchr
> --1.04%-- [...]
>
> 0.01% makedumpfile-cl ld-linux-x86-64.so.2
> |
> |--49.69%-- strcmp
> | |
> | |--67.41%-- 0x8922974
> | | 0x42494c4700342e33
> | |
> | --32.59%-- 0x9691a75
> | 0x42494c4700352e32
> |
> |--17.46%-- _dl_name_match_p
> | _dl_check_all_versions
> |
> |--16.51%-- do_lookup_x
> |
> --16.34%-- _dl_lookup_symbol_x
> _dl_relocate_object
> dl_main
> _dl_sysdep_start
> 0x4156415741e58948
>
> 0.00% makedumpfile-cl libstdc++.so.6
> |
> --- 0x37282bb470
> 0x3728253b43
> 0x7fff6c26de6d
> 0x64656b616d2f6873
>
> 0.00% makedumpfile-cl [megaraid_sas]
> |
> --- megasas_isr
> handle_irq_event_percpu
> handle_irq_event
> handle_edge_irq
> handle_irq
> do_IRQ
> ret_from_intr
> __exclude_unnecessary_pages
> exclude_unnecessary_pages_cyclic
> writeout_dumpfile
> 0x7fff6c26de6d
> 0x64656b616d2f6873
>
> 0.00% makedumpfile-cl [qla2xxx]
> |
> --- qla24xx_mbx_completion
> qla24xx_msix_default
> handle_irq_event_percpu
> handle_irq_event
> handle_edge_irq
> handle_irq
> do_IRQ
> ret_from_intr
> __change_page_attr
> __change_page_attr_set_clr
> change_page_attr_set_clr
> _set_memory_wb
> ioremap_change_attr
> kernel_map_sync_memtype
> __ioremap_caller
> ioremap_cache
> copy_oldmem_page
> read_from_oldmem
> read_vmcore
> proc_reg_read
> vfs_read
> sys_read
> system_call_fastpath
> __read_nocancel
>
> 0.00% makedumpfile-cl [jbd2]
> |
> --- jbd2_journal_start
> ext4_dirty_inode
> __mark_inode_dirty
> update_time
> file_update_time
> __generic_file_aio_write
> generic_file_aio_write
> ext4_file_write
> do_sync_write
> vfs_write
> sys_write
> system_call_fastpath
> __write_nocancel
> 0xffffff0000003725
>
>
>
> Failed to open [dm_mirror], continuing without symbols
> Failed to open [ext4], continuing without symbols
> # ========
> # captured on: Fri Dec 7 16:45:46 2012
> # hostname : (none)
> # os release : 3.7.0-rc8-cliff-bench+
> # perf version : 3.7.rc8.3.ge0fb22
> # arch : x86_64
> # nrcpus online : 1
> # nrcpus avail : 1
> # cpudesc : Intel(R) Xeon(R) CPU E7- 4820 @ 2.00GHz
> # cpuid : GenuineIntel,6,47,2
> # total memory : 240104 kB
> # cmdline : /var/crash/perf record -g -o /mnt///127.0.0.1-2012-12-07-16:45:20/perf.data2 /var/crash/makedumpfile-cliff --message-level 31 -i /var/crash/vmcoreinfo.txt -N -d 31 /proc/vmcore /mnt///127.0.0.1-2012-12-07-16:45:20/vmcore-empty-2
> # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 3 }
> # HEADER_CPU_TOPOLOGY info available, use -I to display
> # HEADER_NUMA_TOPOLOGY info available, use -I to display
> # pmu mappings: cpu = 4, software = 1, tracepoint = 2, uncore_bbox_0 = 15, uncore_bbox_1 = 16, uncore_cbox_0 = 7, uncore_cbox_1 = 8, uncore_cbox_2 = 9, uncore_cbox_3 = 10, uncore_cbox_4 = 11, uncore_cbox_5 = 12, uncore_cbox_6 = 13, uncore_cbox_7 = 14, uncore_mbox_0 = 19, uncore_mbox_1 = 20, uncore_rbox_0 = 21, uncore_rbox_1 = 22, uncore_sbox_0 = 17, uncore_sbox_1 = 18, breakpoint = 5, uncore_ubox = 6, uncore_wbox = 23
> # ========
> #
> # Samples: 5K of event 'cycles'
> # Event count (approx.): 1493942335
> #
> # Overhead Command Shared Object
> # ........ ............... ....................
> #
> 51.45% makedumpfile-cl makedumpfile-cliff
> |
> |--51.45%-- set_bitmap_cyclic
> | |
> | --100.00%-- exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--11.66%-- get_num_dumpable_cyclic
> |
> |--7.96%-- clear_bit_on_2nd_bitmap_for_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--6.93%-- create_1st_bitmap_cyclic
> |
> |--4.52%-- __exclude_unnecessary_pages_kernel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.35%-- clear_bit_on_2nd_bitmap
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.05%-- set_bit_on_1st_bitmap
> |
> |--3.63%-- update_cyclic_region
> |
> |--3.52%-- write_kdump_pages_and_bitmap_cyclic
> | writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--1.87%-- is_xen_memory
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> --0.07%-- [...]
>
> 47.68% makedumpfile-cl [kernel.kallsyms]
> |
> |--77.89%-- write_vmcore_get_excludes
> | write_vmcore_pfn_lists
> | proc_reg_write
> | vfs_write
> | sys_write
> | system_call_fastpath
> | __write_nocancel
> | exclude_unnecessary_pages_cyclic
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--15.34%-- walk_system_ram_range
> | |
> | |--96.92%-- page_is_ram
> | | __ioremap_caller
> | | ioremap_cache
> | | |
> | | |--99.51%-- write_vmcore_get_memmap
> | | | write_vmcore_pfn_lists
> | | | proc_reg_write
> | | | vfs_write
> | | | sys_write
> | | | system_call_fastpath
> | | | __write_nocancel
> | | | 0x7fff0b66fe70
> | | | 0x64656b616d2f6873
> | | --0.49%-- [...]
> | |
> | |--2.84%-- pat_pagerange_is_ram
> | | |
> | | |--58.30%-- free_memtype
> | | | iounmap
> | | | copy_oldmem_page
> | | | read_from_oldmem
> | | | read_vmcore
> | | | proc_reg_read
> | | | vfs_read
> | | | sys_read
> | | | system_call_fastpath
> | | | __read_nocancel
> | | | |
> | | | --100.00%-- 0x45524f4300000001
> | | |
> | | --41.70%-- reserve_memtype
> | | __ioremap_caller
> | | ioremap_cache
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | --0.24%-- [...]
> |
> |--0.76%-- __purge_vmap_area_lazy
> | |
> | |--76.20%-- free_vmap_area_noflush
> | | free_unmap_vmap_area
> | | remove_vm_area
> | | iounmap
> | | copy_oldmem_page
> | | read_from_oldmem
> | | read_vmcore
> | | proc_reg_read
> | | vfs_read
> | | sys_read
> | | system_call_fastpath
> | | __read_nocancel
> | | |
> | | |--50.02%-- 0x45524f4300000001
> | | |
> | | --49.98%-- 0x0
> | |
> | --23.80%-- vm_unmap_aliases
> | change_page_attr_set_clr
> | _set_memory_wb
> | ioremap_change_attr
> | kernel_map_sync_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> |
> |--0.66%-- iomem_map_sanity_check
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> | |
> | |--50.44%-- 0x45524f4300000001
> | |
> | --49.56%-- 0x0
> |
> |--0.51%-- try_preserve_large_page
> | __change_page_attr
> | __change_page_attr_set_clr
> | change_page_attr_set_clr
> | _set_memory_wb
> | ioremap_change_attr
> | kernel_map_sync_memtype
> | __ioremap_caller
> | ioremap_cache
> | copy_oldmem_page
> | read_from_oldmem
> | read_vmcore
> | proc_reg_read
> | vfs_read
> | sys_read
> | system_call_fastpath
> | __read_nocancel
> --4.84%-- [...]
>
> 0.72% makedumpfile-cl libc.so.6
> |
> |--36.59%-- __memset_sse2
> | |
> | --100.00%-- 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--31.88%-- memcpy
> | |
> | --100.00%-- writeout_dumpfile
> | 0x7fff0b66fe70
> | 0x64656b616d2f6873
> |
> |--4.88%-- time
> |
> |--4.80%-- _IO_file_xsputn@@GLIBC_2.2.5
> | 0x7f7e97029000
> |
> |--2.46%-- _IO_file_init@@GLIBC_2.2.5
> |
> |--2.45%-- _int_free
> |
> |--2.45%-- 0x372527ffa0
> |
> |--2.44%-- _IO_default_xsputn
> | 0x71e4ef
> |
> |--2.42%-- __lseek_nocancel
> |
> |--2.41%-- _IO_getline_info
> |
> |--2.41%-- __strlen_sse42
> | 0x61705f6769746e6f
> |
> |--2.41%-- _IO_fgets
> | 0x3638343533313d45
> |
> --2.40%-- vfprintf
> fprintf
>
> 0.13% makedumpfile-cl ld-linux-x86-64.so.2
> |
> |--28.61%-- _dl_relocate_object
> | dl_main
> | _dl_sysdep_start
> | 0x4156415741e58948
> |
> |--28.61%-- do_lookup_x
> |
> |--14.96%-- strcmp
> | 0x6e696c2d646c0036
> |
> |--14.34%-- _dl_lookup_symbol_x
> | _dl_relocate_object
> | dl_main
> | _dl_sysdep_start
> | 0x4156415741e58948
> |
> --13.48%-- _dl_sort_fini
> _dl_fini
> exit
>
> 0.02% makedumpfile-cl libstdc++.so.6
> |
> --- std::basic_ios<char, std::char_traits<char> >::init(std::basic_streambuf<char, std::char_traits<char> >*)
> 0x37284ebbe0
> std::basic_ostream<char, std::char_traits<char> >::~basic_ostream()
>
>
>
--
Cliff Wickman
SGI
cpw@sgi.com
(651) 683-3824
[-- Attachment #2: 121207.proc_vmcore2 --]
[-- Type: text/plain, Size: 31010 bytes --]
To: kumagai-atsushi@mxc.nes.nec.co.jp d.hatayama@jp.fujitsu.com
Cc: kexec@lists.infradead.org
Subject: [PATCH v2] makedumpfile: request the kernel do page scans
From: Cliff Wickman <cpw@sgi.com>
I've been experimenting with asking the kernel to scan the page tables
instead of reading all those page structures through /proc/vmcore.
The results are rather dramatic.
On a small, idle UV: about 4 sec. versus about 40 sec.
On a 8TB UV the unnecessary page scan takes 4 minutes, vs. about 200 min
through /proc/vmcore.
This patch incorporates this scheme into version 1.5.1, so that the cyclic
processing can use the kernel scans.
It also uses the page_is_buddy logic to speed the finding of free pages.
And also allows makedumpfile to work as before with a kernel that does
not provide /proc/vmcore_pfn_lists.
This patch:
- writes requests to new kernel file /proc/vmcore_pfn_lists
- makes request PL_REQUEST_MEMMAP to pass the crash kernel information about
the boot kernel
- makes requests PL_REQUEST_FREE and PL_REQUEST_EXCLUDE, asking the kernel
to return lists of PFNs
- adds page scan timing options -n -o and -t
The patch [PATCH] makedumpfile: fix to exclude_unnecessary_pages_cyclic
is re-done by the below, so that patch should not be applied.
This patch depends on a kernel patch, so I'm also sending one that applies
to a 3.0.13 kernel:
[PATCH] scan page tables for makedumpfile, 3.0.13 kernel
Diffed against makedumpfile-1.5.1
Signed-off-by: Cliff Wickman <cpw@sgi.com>
---
dwarf_info.c | 2
makedumpfile.c | 527 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
makedumpfile.h | 93 +++++++++-
print_info.c | 5
print_info.h | 3
5 files changed, 605 insertions(+), 25 deletions(-)
Index: makedumpfile-1.5.1/makedumpfile.h
===================================================================
--- makedumpfile-1.5.1.orig/makedumpfile.h
+++ makedumpfile-1.5.1/makedumpfile.h
@@ -89,6 +89,8 @@ int get_mem_type(void);
#define LSEEKED_PDESC (2)
#define LSEEKED_PDATA (3)
+#define EXTRA_MEMMAPS 100
+
/*
* Xen page flags
*/
@@ -421,7 +423,8 @@ do { \
#define KVER_MIN_SHIFT 16
#define KERNEL_VERSION(x,y,z) (((x) << KVER_MAJ_SHIFT) | ((y) << KVER_MIN_SHIFT) | (z))
#define OLDEST_VERSION KERNEL_VERSION(2, 6, 15)/* linux-2.6.15 */
-#define LATEST_VERSION KERNEL_VERSION(3, 4, 8)/* linux-3.4.8 */
+//define LATEST_VERSION KERNEL_VERSION(3, 4, 8)/* linux-3.4.8 */
+#define LATEST_VERSION KERNEL_VERSION(3, 7, 8)/* linux-3.4.8 */
/*
* vmcoreinfo in /proc/vmcore
@@ -797,9 +800,20 @@ typedef struct {
} xen_crash_info_v2_t;
struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
unsigned long long pfn_start;
unsigned long long pfn_end;
- unsigned long mem_map;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
};
struct dump_bitmap {
@@ -878,6 +892,7 @@ struct DumpInfo {
int flag_rearrange; /* flag of creating dumpfile from
flattened format */
int flag_split; /* splitting vmcore */
+ int flag_use_kernel_lists;
int flag_cyclic; /* cyclic processing to keep memory consumption */
int flag_reassemble; /* reassemble multiple dumpfiles into one */
int flag_refiltering; /* refilter from kdump-compressed file */
@@ -1393,6 +1408,80 @@ struct domain_list {
unsigned int pickled_id;
};
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * limit the size of the pfn list to this many pfn_element structures
+ */
+#define MAX_PFN_LIST 10000
+
+/*
+ * one element in the pfn_list
+ */
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negoiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
#define PAGES_PER_MAPWORD (sizeof(unsigned long) * 8)
#define MFNS_PER_FRAME (info->page_size / sizeof(unsigned long))
Index: makedumpfile-1.5.1/dwarf_info.c
===================================================================
--- makedumpfile-1.5.1.orig/dwarf_info.c
+++ makedumpfile-1.5.1/dwarf_info.c
@@ -350,6 +350,8 @@ get_data_member_location(Dwarf_Die *die,
return TRUE;
}
+int dwarf_formref(Dwarf_Attribute *, Dwarf_Off *);
+
static int
get_die_type(Dwarf_Die *die, Dwarf_Die *die_type)
{
Index: makedumpfile-1.5.1/print_info.c
===================================================================
--- makedumpfile-1.5.1.orig/print_info.c
+++ makedumpfile-1.5.1/print_info.c
@@ -244,6 +244,11 @@ print_usage(void)
MSG(" [-f]:\n");
MSG(" Overwrite DUMPFILE even if it already exists.\n");
MSG("\n");
+ MSG(" [-o]:\n");
+ MSG(" Read page structures from /proc/vmcore in the scan for\n");
+ MSG(" free and excluded pages regardless of whether\n");
+ MSG(" /proc/vmcore_pfn_lists is present.\n");
+ MSG("\n");
MSG(" [-h]:\n");
MSG(" Show help message and LZO/snappy support status (enabled/disabled).\n");
MSG("\n");
Index: makedumpfile-1.5.1/print_info.h
===================================================================
--- makedumpfile-1.5.1.orig/print_info.h
+++ makedumpfile-1.5.1/print_info.h
@@ -43,7 +43,8 @@ void print_execution_time(char *step_nam
*/
#define MIN_MSG_LEVEL (0)
#define MAX_MSG_LEVEL (31)
-#define DEFAULT_MSG_LEVEL (7) /* Print the progress indicator, the
+// cpw: was 7 but add x10 for testing
+#define DEFAULT_MSG_LEVEL (23) /* Print the progress indicator, the
common message, the error message */
#define ML_PRINT_PROGRESS (0x001) /* Print the progress indicator */
#define ML_PRINT_COMMON_MSG (0x002) /* Print the common message */
Index: makedumpfile-1.5.1/makedumpfile.c
===================================================================
--- makedumpfile-1.5.1.orig/makedumpfile.c
+++ makedumpfile-1.5.1/makedumpfile.c
@@ -13,6 +13,8 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
+#define _GNU_SOURCE
+#include <stdio.h>
#include "makedumpfile.h"
#include "print_info.h"
#include "dwarf_info.h"
@@ -31,6 +33,13 @@ struct srcfile_table srcfile_table;
struct vm_table vt = { 0 };
struct DumpInfo *info = NULL;
+int pfn_list_fd;
+struct pfn_element *pfn_list;
+int nflag = 0;
+int oflag = 0;
+int tflag = 0;
+struct timeval scan_start;
+int max_pfn_list;
char filename_stdout[] = FILENAME_STDOUT;
@@ -2423,6 +2432,22 @@ get_mm_sparsemem(void)
unsigned long long pfn_start, pfn_end;
unsigned long section, mem_map;
unsigned long *mem_sec = NULL;
+ unsigned long vaddr;
+ unsigned long paddr;
+ unsigned long lastvaddr;
+ unsigned long lastpaddr;
+ unsigned long diff;
+ long j;
+ int i;
+ int npfns;
+ int pagesize;
+ int num_mem_map;
+ int num_added = 0;
+ struct mem_map_data *mmd;
+ struct mem_map_data *curmmd;
+ struct mem_map_data *work1mmd;
+ struct mem_map_data *work2mmd;
+ struct mem_map_data *lastmmd;
int ret = FALSE;
@@ -2449,7 +2474,8 @@ get_mm_sparsemem(void)
}
info->num_mem_map = num_section;
if ((info->mem_map_data = (struct mem_map_data *)
- malloc(sizeof(struct mem_map_data)*info->num_mem_map)) == NULL) {
+ malloc(sizeof(struct mem_map_data) *
+ (EXTRA_MEMMAPS + info->num_mem_map))) == NULL) {
ERRMSG("Can't allocate memory for the mem_map_data. %s\n",
strerror(errno));
goto out;
@@ -2467,6 +2493,74 @@ get_mm_sparsemem(void)
dump_mem_map(pfn_start, pfn_end, mem_map, section_nr);
}
ret = TRUE;
+
+ /* add paddr to the table */
+ mmd = &info->mem_map_data[0];
+ num_mem_map = info->num_mem_map;
+ lastmmd = mmd + num_mem_map;
+ for (i = 0; i < num_mem_map; i++) {
+ if (mmd[i].mem_map == 0) {
+ mmd[i].paddr = 0;
+ } else {
+ mmd[i].paddr = vaddr_to_paddr(mmd[i].mem_map);
+ if (mmd[i].paddr == 0) {
+ printf("! can't translate %#lx to paddr\n",
+ mmd[i].mem_map);
+ exit(1);
+ }
+ /*
+ * When we pass a mem_map and its paddr to the kernel
+ * it will be ioremap'd assuming the entire range
+ * of pfn's are consecutive. If they are not then
+ * we need to split the range into two.
+ */
+ pagesize = SIZE(page);
+ npfns = mmd[i].pfn_end - mmd[i].pfn_start;
+ vaddr = (unsigned long)mmd[i].mem_map;
+ paddr = vaddr_to_paddr(vaddr);
+ diff = vaddr - paddr;
+ lastvaddr = vaddr + (pagesize * (npfns-1));
+ lastpaddr = vaddr_to_paddr(lastvaddr);
+ if (lastvaddr - lastpaddr != diff) {
+ /* there is a break in vtop somewhere in this range */
+ for (j = 0; j < npfns; j++) {
+ paddr = vaddr_to_paddr(vaddr);
+ if (vaddr - paddr != diff) {
+ diff = vaddr - paddr;
+ /* insert a new entry if we have room */
+ if (num_added < EXTRA_MEMMAPS) {
+ curmmd = &info->mem_map_data[i];
+ num_added++;
+ work1mmd = lastmmd - 1;
+ for (work2mmd = lastmmd;
+ work2mmd > curmmd; work2mmd--) {
+ work1mmd = work2mmd - 1;
+ *work2mmd = *work1mmd;
+ }
+ work2mmd = work1mmd + 1;
+ work1mmd->pfn_end =
+ work1mmd->pfn_start + j;
+ work2mmd->pfn_start =
+ work1mmd->pfn_end;
+ work2mmd->mem_map =
+ work1mmd->mem_map + (pagesize * j);
+ lastmmd++;
+ num_mem_map++;
+ info->num_mem_map++;
+ /*
+ * need only 1 split, the new
+ * one will be checked also.
+ */
+ break;
+ } else
+ printf("warn: out of EXTRA_MEMMAPS\n");
+ }
+ vaddr += pagesize;
+ }
+ }
+ }
+ }
+
out:
if (mem_sec != NULL)
free(mem_sec);
@@ -2579,6 +2673,105 @@ initialize_bitmap_memory(void)
return TRUE;
}
+/*
+ * construct a version of the mem_map_data table to pass to the kernel
+ */
+void *
+make_kernel_mmap(int *kmap_elements, int *kmap_size)
+{
+ int i, j;
+ int elements = 0;
+ int page_structs;
+ int elem;
+ unsigned long base_end_pfn;
+ unsigned long end_paddr;
+ struct mem_map_data *mmdo, *mmdn;
+ struct mem_map_data *mmdbase, *mmdnext, *mmdend, *mmdwork;
+ struct mem_map_data temp_mmd;
+ struct mem_map_data *mmap;
+
+ mmap = malloc(info->num_mem_map * sizeof(struct mem_map_data));
+ if (mmap == NULL) {
+ ERRMSG("Can't allocate memory kernel map\n");
+ return NULL;
+ }
+
+ /* condense them down to the valid ones */
+ for (i = 0, mmdn = mmap, mmdo = &info->mem_map_data[0];
+ i < info->num_mem_map; i++, mmdo++) {
+ if (mmdo->mem_map && mmdo->paddr) {
+ *mmdn = *mmdo;
+ mmdn++;
+ elements++;
+ }
+ }
+
+ /* make sure it is sorted by mem_map (it should be already) */
+ mmdn = mmap;
+ for (i = 0; i < elements - 1; i++) {
+ for (j = i + 1; j < elements; j++) {
+ if (mmdn[j].mem_map < mmdn[i].mem_map) {
+ temp_mmd = mmdn[j];
+ mmdn[j] = mmdn[i];
+ mmdn[i] = temp_mmd;
+ }
+ }
+ }
+
+ /*
+ * consolidate those mem_map's with occupying consecutive physical
+ * addresses
+ * pages represented by these pages structs: addr of page struct
+ * pfns 0x1000000-1008000 mem_map 0xffffea0038000000 paddr 0x11f7e00000
+ * pfns 0x1008000-1010000 mem_map 0xffffea00381c0000 paddr 0x11f7fc0000
+ * pfns 0x1010000-1018000 mem_map 0xffffea0038380000 paddr 0x11f8180000
+ * 8000 increments inc's: 1c0000
+ * 8000000 of memory (128M) 8000 page structs
+ *
+ */
+ mmdbase = mmap;
+ mmdnext = mmap + 1;
+ mmdend = mmap + elements;
+ while (mmdnext < mmdend) {
+ elem = mmdend - mmdnext;
+ /* test mmdbase vs. mmdwork and onward: */
+ for (i = 0, mmdwork = mmdnext; i < elem; i++, mmdwork++) {
+ base_end_pfn = mmdbase->pfn_end;
+ if (base_end_pfn == mmdwork->pfn_start) {
+ page_structs = (mmdbase->pfn_end -
+ mmdbase->pfn_start);
+ end_paddr = (page_structs * SIZE(page))
+ + mmdbase->paddr;
+ if (mmdwork->paddr == end_paddr) {
+ /* extend base by the work one */
+ mmdbase->pfn_end = mmdwork->pfn_end;
+ /* next is where to begin next time */
+ mmdnext = mmdwork + 1;
+ } else {
+ /* gap in address of page
+ structs; end of section */
+ mmdbase++;
+ if (mmdwork - mmdbase > 0)
+ *mmdbase = *mmdwork;
+ mmdnext = mmdwork + 1;
+ break;
+ }
+ } else {
+ /* gap in pfns; end of section */
+ mmdbase++;
+ if (mmdwork - mmdbase > 0)
+ *mmdbase = *mmdwork;
+ mmdnext = mmdwork + 1;
+ break;
+ }
+ }
+ }
+ elements = (mmdbase - mmap) + 1;
+ *kmap_elements = elements;
+ *kmap_size = elements * sizeof(struct mem_map_data);
+ return mmap;
+}
+
int
initial(void)
{
@@ -2841,7 +3034,19 @@ out:
if (!get_value_for_old_linux())
return FALSE;
+ /*
+ * page_is_buddy will tell us whether free pages can be identified
+ * by flags and counts in the page structure without making an extra
+ * pass through the free lists.
+ * This is applicable to using /proc/vmcore or using the kernel.
+ * force all old (-o) forms to search free lists
+ */
+/*
if (info->flag_cyclic && (info->dump_level & DL_EXCLUDE_FREE))
+ if ((info->flag_cyclic || !oflag) &&
+ (info->dump_level & DL_EXCLUDE_FREE))
+*/
+ if (info->dump_level & DL_EXCLUDE_FREE)
setup_page_is_buddy();
return TRUE;
@@ -3557,6 +3762,65 @@ out:
return ret;
}
+/*
+ * let the kernel find excludable pages from one node
+ */
+void
+__exclude_free_pages_kernel(unsigned long pgdat, int node)
+{
+ int i, j, ret, pages;
+ unsigned long pgdat_paddr;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+ struct pfn_element *pe;
+
+ if ((pgdat_paddr = vaddr_to_paddr(pgdat)) == NOT_PADDR) {
+ ERRMSG("Can't convert virtual address(%#lx) to physical.\n",
+ pgdat);
+ return;
+ }
+
+ /*
+ * Get the list of free pages.
+ * This may be broken up into MAX_PFN_list arrays of PFNs.
+ */
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_FREE;
+ request.node = node;
+ request.pgdat_paddr = pgdat_paddr;
+ request.pgdat_vaddr = pgdat;
+ request.reply_ptr = (void *)&reply;
+ request.pfn_list_ptr = (void *)pfn_list;
+ memset(&reply, 0, sizeof(reply));
+
+ do {
+ request.more = 0;
+ if (reply.more) {
+ /* this is to be a continuation of the last request */
+ request.more = 1;
+ request.zone_index = reply.zone_index;
+ request.freearea_index = reply.freearea_index;
+ request.type_index = reply.type_index;
+ request.list_ct = reply.list_ct;
+ }
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret != sizeof(request)) {
+ printf("PL_REQUEST_FREE failed\n");
+ return;
+ }
+ pfn_free += reply.pfn_free;
+
+ for (i = 0; i < reply.in_pfn_list; i++) {
+ pe = &pfn_list[i];
+ pages = (1 << pe->order);
+ for (j = 0; j < pages; j++) {
+ clear_bit_on_2nd_bitmap_for_kernel(pe->pfn + j);
+ }
+ }
+ } while (reply.more);
+
+ return;
+}
int
_exclude_free_page(void)
@@ -3564,6 +3828,7 @@ _exclude_free_page(void)
int i, nr_zones, num_nodes, node;
unsigned long node_zones, zone, spanned_pages, pgdat;
struct timeval tv_start;
+int ct=0;
if ((node = next_online_node(0)) < 0) {
ERRMSG("Can't get next online node.\n");
@@ -3576,7 +3841,24 @@ _exclude_free_page(void)
gettimeofday(&tv_start, NULL);
for (num_nodes = 1; num_nodes <= vt.numnodes; num_nodes++) {
-
+ if (!info->flag_cyclic && info->flag_use_kernel_lists) {
+ node_zones = pgdat + OFFSET(pglist_data.node_zones);
+ if (!readmem(VADDR,
+ pgdat + OFFSET(pglist_data.nr_zones),
+ &nr_zones, sizeof(nr_zones))) {
+ ERRMSG("Can't get nr_zones.\n");
+ return FALSE;
+ }
+ print_progress(PROGRESS_FREE_PAGES, num_nodes - 1,
+ vt.numnodes);
+ /* ask the kernel to do one node */
+ __exclude_free_pages_kernel(pgdat, node);
+ goto next_pgdat;
+ }
+ /*
+ * kernel does not have the pfn_list capability
+ * use the old way
+ */
print_progress(PROGRESS_FREE_PAGES, num_nodes - 1, vt.numnodes);
node_zones = pgdat + OFFSET(pglist_data.node_zones);
@@ -3600,9 +3882,11 @@ _exclude_free_page(void)
}
if (!spanned_pages)
continue;
+ct++;
if (!reset_bitmap_of_free_pages(zone))
return FALSE;
}
+ next_pgdat:
if (num_nodes < vt.numnodes) {
if ((node = next_online_node(node + 1)) < 0) {
ERRMSG("Can't get next online node.\n");
@@ -3620,6 +3904,8 @@ _exclude_free_page(void)
*/
print_progress(PROGRESS_FREE_PAGES, vt.numnodes, vt.numnodes);
print_execution_time(PROGRESS_FREE_PAGES, &tv_start);
+ if (tflag)
+ print_execution_time("Total time", &scan_start);
return TRUE;
}
@@ -3780,7 +4066,6 @@ setup_page_is_buddy(void)
}
} else
info->page_is_buddy = page_is_buddy_v2;
-
out:
if (!info->page_is_buddy)
DEBUG_MSG("Can't select page_is_buddy handler; "
@@ -3989,10 +4274,88 @@ exclude_zero_pages(void)
return TRUE;
}
+/*
+ * let the kernel find excludable pages from one mem_section
+ */
+int
+__exclude_unnecessary_pages_kernel(int mm, struct mem_map_data *mmd)
+{
+ unsigned long long pfn_start = mmd->pfn_start;
+ unsigned long long pfn_end = mmd->pfn_end;
+ int i, j, ret, pages, flag;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+ struct pfn_element *pe;
+
+ /*
+ * Get the list of to-be-excluded pages in this section.
+ * It may be broken up by groups of max_pfn_list size.
+ */
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_EXCLUDE;
+ request.paddr = mmd->paddr; /* phys addr of mem_map */
+ request.reply_ptr = (void *)&reply;
+ request.pfn_list_ptr = (void *)pfn_list;
+ request.exclude_bits = 0;
+ request.pfn_start = pfn_start;
+ request.count = pfn_end - pfn_start;
+ if (info->dump_level & DL_EXCLUDE_CACHE)
+ request.exclude_bits |= DL_EXCLUDE_CACHE;
+ if (info->dump_level & DL_EXCLUDE_CACHE_PRI)
+ request.exclude_bits |= DL_EXCLUDE_CACHE_PRI;
+ if (info->dump_level & DL_EXCLUDE_USER_DATA)
+ request.exclude_bits |= DL_EXCLUDE_USER_DATA;
+ /* if we try for free pages from the freelists then we don't need
+ to ask here for 'buddy' pages */
+ if (info->dump_level & DL_EXCLUDE_FREE)
+ request.exclude_bits |= DL_EXCLUDE_FREE;
+ memset(&reply, 0, sizeof(reply));
+
+ do {
+ /* pfn represented by paddr */
+ request.more = 0;
+ if (reply.more) {
+ /* this is to be a continuation of the last request */
+ request.more = 1;
+ request.map_index = reply.map_index;
+ }
+
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret != sizeof(request))
+ return FALSE;
+
+ pfn_cache += reply.pfn_cache;
+ pfn_cache_private += reply.pfn_cache_private;
+ pfn_user += reply.pfn_user;
+ pfn_free += reply.pfn_free;
+
+ flag = 0;
+ for (i = 0; i < reply.in_pfn_list; i++) {
+ pe = &pfn_list[i];
+ pages = (1 << pe->order);
+ for (j = 0; j < pages; j++) {
+ if (clear_bit_on_2nd_bitmap_for_kernel(
+ pe->pfn + j) == FALSE) {
+ printf("fail: mm %d slot %d pfn %#lx\n",
+ mm, i, pe->pfn + j);
+ printf("paddr %#llx pfn %#llx-%#llx mem_map %#lx\n", mmd->paddr, mmd->pfn_start, mmd->pfn_end, mmd->mem_map);
+ flag = 1;
+ break;
+ }
+ if (flag) break;
+ }
+ }
+ } while (reply.more);
+
+ return TRUE;
+}
+
int
-__exclude_unnecessary_pages(unsigned long mem_map,
- unsigned long long pfn_start, unsigned long long pfn_end)
+__exclude_unnecessary_pages(int mm, struct mem_map_data *mmd)
{
+ unsigned long long pfn_start = mmd->pfn_start;
+ unsigned long long pfn_end = mmd->pfn_end;
+ unsigned long mem_map = mmd->mem_map;
unsigned long long pfn, pfn_mm, maddr;
unsigned long long pfn_read_start, pfn_read_end, index_pg;
unsigned char page_cache[SIZE(page) * PGMM_CACHED];
@@ -4000,6 +4363,12 @@ __exclude_unnecessary_pages(unsigned lon
unsigned int _count, _mapcount = 0;
unsigned long flags, mapping, private = 0;
+ if (info->flag_use_kernel_lists) {
+ if (__exclude_unnecessary_pages_kernel(mm, mmd) == FALSE)
+ return FALSE;
+ return TRUE;
+ }
+
/*
* Refresh the buffer of struct page, when changing mem_map.
*/
@@ -4037,7 +4406,6 @@ __exclude_unnecessary_pages(unsigned lon
pfn_mm = PGMM_CACHED - index_pg;
else
pfn_mm = pfn_end - pfn;
-
if (!readmem(VADDR, mem_map,
page_cache + (index_pg * SIZE(page)),
SIZE(page) * pfn_mm)) {
@@ -4061,7 +4429,6 @@ __exclude_unnecessary_pages(unsigned lon
* Exclude the free page managed by a buddy
*/
if ((info->dump_level & DL_EXCLUDE_FREE)
- && info->flag_cyclic
&& info->page_is_buddy
&& info->page_is_buddy(flags, _mapcount, private, _count)) {
int i;
@@ -4110,19 +4477,78 @@ __exclude_unnecessary_pages(unsigned lon
return TRUE;
}
+/*
+ * Pass in the mem_map_data table.
+ * Must do this once, and before doing PL_REQUEST_FREE or PL_REQUEST_EXCLUDE.
+ */
+int
+setup_kernel_mmap()
+{
+ int ret;
+ int kmap_elements, kmap_size;
+ long malloc_size;
+ void *kmap_addr;
+ struct pfn_list_request request;
+ struct pfn_reply reply;
+
+ kmap_addr = make_kernel_mmap(&kmap_elements, &kmap_size);
+ if (kmap_addr == NULL)
+ return FALSE;
+ memset(&request, 0, sizeof(request));
+ request.request = PL_REQUEST_MEMMAP;
+ request.map_ptr = kmap_addr;
+ request.reply_ptr = (void *)&reply;
+ request.map_count = kmap_elements;
+ request.map_size = kmap_size;
+ request.list_size = MAX_PFN_LIST;
+
+ ret = write(pfn_list_fd, &request, sizeof(request));
+ if (ret < 0) {
+ fprintf(stderr, "PL_REQUEST_MEMMAP returned %d\n", ret);
+ return FALSE;
+ }
+ /* the reply tells us how long the kernel's list actually is */
+ max_pfn_list = reply.pfn_list_elements;
+ if (max_pfn_list <= 0) {
+ fprintf(stderr,
+ "PL_REQUEST_MEMMAP returned max_pfn_list %d\n",
+ max_pfn_list);
+ return FALSE;
+ }
+ if (max_pfn_list < MAX_PFN_LIST) {
+ printf("length of pfn list dropped from %d to %d\n",
+ MAX_PFN_LIST, max_pfn_list);
+ }
+ free(kmap_addr);
+ /*
+ * Allocate the buffer for the PFN list (just once).
+ */
+ malloc_size = max_pfn_list * sizeof(struct pfn_element);
+ if ((pfn_list = (struct pfn_element *)malloc(malloc_size)) == NULL) {
+ ERRMSG("Can't allocate pfn_list of %ld\n", malloc_size);
+ return FALSE;
+ }
+ return TRUE;
+}
+
int
exclude_unnecessary_pages(void)
{
- unsigned int mm;
- struct mem_map_data *mmd;
- struct timeval tv_start;
+ unsigned int mm;
+ struct mem_map_data *mmd;
+ struct timeval tv_start;
if (is_xen_memory() && !info->dom0_mapnr) {
ERRMSG("Can't get max domain-0 PFN for excluding pages.\n");
return FALSE;
}
+ if (!info->flag_cyclic && info->flag_use_kernel_lists) {
+ if (setup_kernel_mmap() == FALSE)
+ return FALSE;
+ }
gettimeofday(&tv_start, NULL);
+ gettimeofday(&scan_start, NULL);
for (mm = 0; mm < info->num_mem_map; mm++) {
print_progress(PROGRESS_UNN_PAGES, mm, info->num_mem_map);
@@ -4131,9 +4557,9 @@ exclude_unnecessary_pages(void)
if (mmd->mem_map == NOT_MEMMAP_ADDR)
continue;
-
- if (!__exclude_unnecessary_pages(mmd->mem_map,
- mmd->pfn_start, mmd->pfn_end))
+ if (mmd->paddr == 0)
+ continue;
+ if (!__exclude_unnecessary_pages(mm, mmd))
return FALSE;
}
@@ -4164,7 +4590,11 @@ exclude_unnecessary_pages_cyclic(void)
*/
copy_bitmap_cyclic();
- if ((info->dump_level & DL_EXCLUDE_FREE) && !info->page_is_buddy)
+ /*
+ * If free pages cannot be identified with the buddy flag and/or
+ * count then we have to search free lists.
+ */
+ if ((info->dump_level & DL_EXCLUDE_FREE) && (!info->page_is_buddy))
if (!exclude_free_page())
return FALSE;
@@ -4187,9 +4617,10 @@ exclude_unnecessary_pages_cyclic(void)
if (mmd->mem_map == NOT_MEMMAP_ADDR)
continue;
- if (mmd->pfn_end >= info->cyclic_start_pfn || mmd->pfn_start <= info->cyclic_end_pfn) {
- if (!__exclude_unnecessary_pages(mmd->mem_map,
- mmd->pfn_start, mmd->pfn_end))
+ if (mmd->pfn_end >= info->cyclic_start_pfn &&
+ mmd->pfn_start <= info->cyclic_end_pfn) {
+ if (__exclude_unnecessary_pages(mm, mmd)
+ == FALSE)
return FALSE;
}
}
@@ -4219,7 +4650,7 @@ update_cyclic_region(unsigned long long
if (!create_1st_bitmap_cyclic())
return FALSE;
- if (!exclude_unnecessary_pages_cyclic())
+ if (exclude_unnecessary_pages_cyclic() == FALSE)
return FALSE;
return TRUE;
@@ -4279,7 +4710,7 @@ create_2nd_bitmap(void)
if (info->dump_level & DL_EXCLUDE_CACHE ||
info->dump_level & DL_EXCLUDE_CACHE_PRI ||
info->dump_level & DL_EXCLUDE_USER_DATA) {
- if (!exclude_unnecessary_pages()) {
+ if (exclude_unnecessary_pages() == FALSE) {
ERRMSG("Can't exclude unnecessary pages.\n");
return FALSE;
}
@@ -4287,8 +4718,10 @@ create_2nd_bitmap(void)
/*
* Exclude free pages.
+ * If free pages cannot be identified with the buddy flag and/or
+ * count then we have to search free lists.
*/
- if (info->dump_level & DL_EXCLUDE_FREE)
+ if ((info->dump_level & DL_EXCLUDE_FREE) && (!info->page_is_buddy))
if (!exclude_free_page())
return FALSE;
@@ -4419,6 +4852,10 @@ create_dump_bitmap(void)
int ret = FALSE;
if (info->flag_cyclic) {
+ if (info->flag_use_kernel_lists) {
+ if (setup_kernel_mmap() == FALSE)
+ goto out;
+ }
if (!prepare_bitmap_buffer_cyclic())
goto out;
@@ -4896,6 +5333,7 @@ get_num_dumpable_cyclic(void)
{
unsigned long long pfn, num_dumpable=0;
+ gettimeofday(&scan_start, NULL);
for (pfn = 0; pfn < info->max_mapnr; pfn++) {
if (!update_cyclic_region(pfn))
return FALSE;
@@ -5225,7 +5663,7 @@ get_loads_dumpfile_cyclic(void)
info->cyclic_end_pfn = info->pfn_cyclic;
if (!create_1st_bitmap_cyclic())
return FALSE;
- if (!exclude_unnecessary_pages_cyclic())
+ if (exclude_unnecessary_pages_cyclic() == FALSE)
return FALSE;
if (!(phnum = get_phnum_memory()))
@@ -5637,6 +6075,10 @@ write_kdump_pages(struct cache_data *cd_
pfn_zero++;
continue;
}
+
+ if (nflag)
+ continue;
+
/*
* Compress the page data.
*/
@@ -5792,6 +6234,7 @@ write_kdump_pages_cyclic(struct cache_da
for (pfn = start_pfn; pfn < end_pfn; pfn++) {
if ((num_dumped % per) == 0)
+
print_progress(PROGRESS_COPY, num_dumped, info->num_dumpable);
/*
@@ -5810,11 +6253,17 @@ write_kdump_pages_cyclic(struct cache_da
*/
if ((info->dump_level & DL_EXCLUDE_ZERO)
&& is_zero_page(buf, info->page_size)) {
+if (!nflag) {
if (!write_cache(cd_header, pd_zero, sizeof(page_desc_t)))
goto out;
+}
pfn_zero++;
continue;
}
+
+ if (nflag)
+ continue;
+
/*
* Compress the page data.
*/
@@ -6232,6 +6681,8 @@ write_kdump_pages_and_bitmap_cyclic(stru
if (!update_cyclic_region(pfn))
return FALSE;
+ if (tflag)
+ print_execution_time("Total time", &scan_start);
if (!write_kdump_pages_cyclic(cd_header, cd_page, &pd_zero, &offset_data))
return FALSE;
@@ -8257,6 +8708,22 @@ static struct option longopts[] = {
{0, 0, 0, 0}
};
+/*
+ * test for the presence of capability in the kernel to provide lists
+ * of pfn's:
+ * /proc/vmcore_pfn_lists
+ * return 1 for present
+ * return 0 for not present
+ */
+int
+test_kernel_pfn_lists(void)
+{
+ if ((pfn_list_fd = open("/proc/vmcore_pfn_lists", O_WRONLY)) < 0) {
+ return 0;
+ }
+ return 1;
+}
+
int
main(int argc, char *argv[])
{
@@ -8282,7 +8749,7 @@ main(int argc, char *argv[])
info->block_order = DEFAULT_ORDER;
message_level = DEFAULT_MSG_LEVEL;
- while ((opt = getopt_long(argc, argv, "b:cDd:EFfg:hi:lMpRrsvXx:", longopts,
+ while ((opt = getopt_long(argc, argv, "b:cDd:EFfg:hi:MnoRrstVvXx:Y", longopts,
NULL)) != -1) {
switch (opt) {
case 'b':
@@ -8340,6 +8807,13 @@ main(int argc, char *argv[])
case 'M':
info->flag_dmesg = 1;
break;
+ case 'n':
+ /* -n undocumented, for testing page scanning time */
+ nflag = 1;
+ break;
+ case 'o':
+ oflag = 1;
+ break;
case 'p':
info->flag_compress = DUMP_DH_COMPRESSED_SNAPPY;
break;
@@ -8358,6 +8832,9 @@ main(int argc, char *argv[])
case 'r':
info->flag_reassemble = 1;
break;
+ case 't':
+ tflag = 1;
+ break;
case 'V':
info->vaddr_for_vtop = strtoul(optarg, NULL, 0);
break;
@@ -8389,6 +8866,12 @@ main(int argc, char *argv[])
goto out;
}
}
+
+ if (oflag)
+ info->flag_use_kernel_lists = 0;
+ else
+ info->flag_use_kernel_lists = test_kernel_pfn_lists();
+
if (flag_debug)
message_level |= ML_PRINT_DEBUG_MSG;
[-- Attachment #3: 121207.vmcore_pagescans.sles --]
[-- Type: text/plain, Size: 21973 bytes --]
To: kumagai-atsushi@mxc.nes.nec.co.jp d.hatayama@jp.fujitsu.com
Cc: kexec@lists.infradead.org
Subject: [PATCH] scan page tables for makedumpfile, 3.0.13 kernel
From: Cliff Wickman <cpw@sgi.com>
This patch provides the kernel support for makedumpfile to request
a list of PFNs.
Accompanies
[PATCH v2] makedumpfile: request the kernel do page scans
---
fs/proc/vmcore.c | 571 +++++++++++++++++++++++++++++++++++++++++++
include/linux/makedumpfile.h | 115 ++++++++
2 files changed, 686 insertions(+)
Index: linux/fs/proc/vmcore.c
===================================================================
--- linux.orig/fs/proc/vmcore.c
+++ linux/fs/proc/vmcore.c
@@ -18,8 +18,18 @@
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/list.h>
+#include <linux/makedumpfile.h>
+#include <linux/mmzone.h>
#include <asm/uaccess.h>
#include <asm/io.h>
+#include <asm/page.h>
+static int num_mem_map_data = 0;
+static struct mem_map_data *mem_map_data;
+static struct pfn_element *pfn_list;
+static long in_pfn_list;
+static int last_found_vaddr = 0;
+static int last_found_paddr = 0;
+static int max_pfn_list;
/* List representing chunks of contiguous memory areas and their offsets in
* vmcore file.
@@ -34,6 +44,7 @@ static size_t elfcorebuf_sz;
static u64 vmcore_size;
static struct proc_dir_entry *proc_vmcore = NULL;
+static struct proc_dir_entry *proc_vmcore_pfn_lists = NULL;
/*
* Returns > 0 for RAM pages, 0 for non-RAM pages, < 0 on error
@@ -207,11 +218,567 @@ static ssize_t read_vmcore(struct file *
return acc;
}
+/*
+ * Given the boot-kernel-relative virtual address of a page
+ * return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+unsigned long
+find_local_vaddr(unsigned long orig_vaddr)
+{
+ int i;
+ int fnd = 0;
+ struct mem_map_data *mmd, *next_mmd;
+ unsigned long paddr;
+ unsigned long local_vaddr;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_vaddr, mmd = mem_map_data + last_found_vaddr,
+ next_mmd = mem_map_data + last_found_vaddr + 1;
+ i < num_mem_map_data; i++, mmd++, next_mmd++) {
+ if (mmd->mem_map && mmd->paddr) {
+ if (orig_vaddr >= mmd->mem_map &&
+ orig_vaddr < next_mmd->mem_map) {
+ offset = orig_vaddr - mmd->mem_map;
+ paddr = mmd->paddr + offset;
+ fnd++;
+ /* caching gives about 99% hit on first pass */
+ last_found_vaddr = i;
+ break;
+ }
+ }
+ }
+
+ if (! fnd) {
+ if (last_found_vaddr > 0) {
+ last_found_vaddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+ }
+
+ /* paddr is now the physical address of the page structure */
+ /* and offset is the offset into the found section, and we have
+ a table of how those sections are ioremap_cache'd */
+ local_vaddr = (unsigned long)mmd->section_vaddr + offset;
+ return local_vaddr;
+}
+
+/*
+ * Given a paddr, return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+void *
+find_local_from_paddr(unsigned long paddr)
+{
+ int i;
+ struct mem_map_data *mmd;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_paddr, mmd = mem_map_data + last_found_paddr;
+ i < num_mem_map_data; i++, mmd++) {
+ if ((paddr >= mmd->paddr) && (paddr < mmd->ending_paddr)) {
+ offset = paddr - mmd->paddr;
+ last_found_paddr = i;
+ /* caching gives about 98% hit on first pass */
+ return (void *)(mmd->section_vaddr + offset);
+ }
+ }
+
+ if (last_found_paddr > 0) {
+ last_found_paddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+}
+
+/*
+ * given an anchoring list_head, walk the list of free pages
+ * 'root' is a virtual address based on the ioremap_cache'd pointer pgp
+ * 'boot_root' is the virtual address of the list root, boot kernel relative
+ *
+ * return the number of pages found on the list
+ */
+int
+walk_freelist(struct list_head *root, int node, int zone, int order, int list,
+ int restart_list, int start_page, struct pfn_list_request *reqp,
+ struct pfn_reply *replyp, struct list_head *boot_root)
+{
+ int list_ct = 0;
+ int list_free_pages = 0;
+ int doit;
+ unsigned long start_pfn;
+ struct page *pagep;
+ struct page *local_pagep;
+ struct list_head *lhp;
+ struct list_head *local_lhp; /* crashkernel-relative */
+ struct list_head *prev;
+ struct pfn_element *pe;
+
+ /*
+ * root is the crashkernel-relative address of the anchor of the
+ * free_list.
+ */
+ prev = root;
+ if (root == NULL) {
+ printk(KERN_EMERG "root is null!!, node %d order %d\n",
+ node, order);
+ return 0;
+ }
+
+ if (root->next == boot_root)
+ /* list is empty */
+ return 0;
+
+ lhp = root->next;
+ local_lhp = (struct list_head *)find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp) {
+ return 0;
+ }
+
+ while (local_lhp != boot_root) {
+ list_ct++;
+ if (lhp == NULL) {
+ printk(KERN_EMERG
+ "The free list has a null!!, node %d order %d\n",
+ node, order);
+ break;
+ }
+ if (list_ct > 1 && local_lhp->prev != prev) {
+ /* can't be compared to root, as that is local */
+ printk(KERN_EMERG "The free list is broken!!\n");
+ break;
+ }
+
+ /* we want the boot kernel's pfn that this page represents */
+ pagep = container_of((struct list_head *)lhp,
+ struct page, lru);
+ start_pfn = pagep - vmemmap;
+ local_pagep = container_of((struct list_head *)local_lhp,
+ struct page, lru);
+ doit = 1;
+ if (restart_list && list_ct < start_page)
+ doit = 0;
+ if (doit) {
+ if (in_pfn_list == max_pfn_list) {
+ /* if array would overflow, come back to
+ this page with a continuation */
+ replyp->more = 1;
+ replyp->zone_index = zone;
+ replyp->freearea_index = order;
+ replyp->type_index = list;
+ replyp->list_ct = list_ct;
+ goto list_is_full;
+ }
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = start_pfn;
+ pe->order = order;
+ list_free_pages += (1 << order);
+ }
+ prev = lhp;
+ lhp = local_pagep->lru.next;
+ /* the local node-relative vaddr: */
+ local_lhp = (struct list_head *)
+ find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp)
+ break;
+ }
+
+list_is_full:
+ return list_free_pages;
+}
+
+/*
+ * Return the pfns of free pages on this node
+ */
+int
+write_vmcore_get_free(struct pfn_list_request *reqp)
+{
+ int node;
+ int nr_zones;
+ int nr_orders = MAX_ORDER;
+ int nr_freelist = MIGRATE_TYPES;
+ int zone;
+ int order;
+ int list;
+ int start_zone = 0;
+ int start_order = 0;
+ int start_list = 0;
+ int ret;
+ int restart = 0;
+ int start_page = 0;
+ int node_free_pages = 0;
+ struct pfn_reply rep;
+ struct pglist_data *pgp;
+ struct zone *zonep;
+ struct free_area *fap;
+ struct list_head *flp;
+ struct list_head *boot_root;
+ unsigned long pgdat_paddr;
+ unsigned long pgdat_vaddr;
+ unsigned long page_aligned_pgdat;
+ unsigned long page_aligned_size;
+ void *mapped_vaddr;
+
+ node = reqp->node;
+ pgdat_paddr = reqp->pgdat_paddr;
+ pgdat_vaddr = reqp->pgdat_vaddr;
+
+ /* map this pglist_data structure within a page-aligned area */
+ page_aligned_pgdat = pgdat_paddr & ~(PAGE_SIZE - 1);
+ page_aligned_size = sizeof(struct pglist_data) +
+ (pgdat_paddr - page_aligned_pgdat);
+ page_aligned_size = ((page_aligned_size + (PAGE_SIZE - 1))
+ >> PAGE_SHIFT) << PAGE_SHIFT;
+ mapped_vaddr = ioremap_cache(page_aligned_pgdat, page_aligned_size);
+ if (!mapped_vaddr) {
+ printk("ioremap_cache of pgdat %#lx failed\n",
+ page_aligned_pgdat);
+ return -EINVAL;
+ }
+ pgp = (struct pglist_data *)(mapped_vaddr +
+ (pgdat_paddr - page_aligned_pgdat));
+ nr_zones = pgp->nr_zones;
+ memset(&rep, 0, sizeof(rep));
+
+ if (reqp->more) {
+ restart = 1;
+ start_zone = reqp->zone_index;
+ start_order = reqp->freearea_index;
+ start_list = reqp->type_index;
+ start_page = reqp->list_ct;
+ }
+
+ in_pfn_list = 0;
+ for (zone = start_zone; zone < nr_zones; zone++) {
+ zonep = &pgp->node_zones[zone];
+ for (order = start_order; order < nr_orders; order++) {
+ fap = &zonep->free_area[order];
+ /* some free_area's are all zero */
+ if (fap->nr_free) {
+ for (list = start_list; list < nr_freelist;
+ list++) {
+ flp = &fap->free_list[list];
+ boot_root = (struct list_head *)
+ (pgdat_vaddr +
+ ((unsigned long)flp -
+ (unsigned long)pgp));
+ ret = walk_freelist(flp, node, zone,
+ order, list, restart,
+ start_page, reqp, &rep,
+ boot_root);
+ node_free_pages += ret;
+ restart = 0;
+ if (rep.more)
+ goto list_full;
+ }
+ }
+ }
+ }
+list_full:
+
+ iounmap(mapped_vaddr);
+
+ /* copy the reply and the valid part of our pfn list to the user */
+ rep.pfn_free = node_free_pages; /* the total, for statistics */
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+/*
+ * Get the memap_data table from makedumpfile
+ * and do the single allocate of the pfn_list.
+ */
+int
+write_vmcore_get_memmap(struct pfn_list_request *reqp)
+{
+ int i;
+ int count;
+ int size;
+ int ret = 0;
+ long pfn_list_elements;
+ long malloc_size;
+ unsigned long page_section_start;
+ unsigned long page_section_size;
+ struct mem_map_data *mmd, *dum_mmd;
+ struct pfn_reply rep;
+ void *bufptr;
+
+ rep.pfn_list_elements = 0;
+ if (num_mem_map_data) {
+ /* shouldn't have been done before, but if it was.. */
+ printk(KERN_INFO "warning: PL_REQUEST_MEMMAP is repeated\n");
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data;
+ i++, mmd++) {
+ iounmap(mmd->section_vaddr);
+ }
+ kfree(mem_map_data);
+ mem_map_data = NULL;
+ num_mem_map_data = 0;
+ kfree(pfn_list);
+ pfn_list = NULL;
+ }
+
+ count = reqp->map_count;
+ size = reqp->map_size;
+ bufptr = reqp->map_ptr;
+ if (size != (count * sizeof(struct mem_map_data))) {
+ printk("Error in mem_map_data, %d * %ld != %d\n",
+ count, sizeof(struct mem_map_data), size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* add a dummy at the end to limit the size of the last entry */
+ size += sizeof(struct mem_map_data);
+
+ mem_map_data = kzalloc(size, GFP_KERNEL);
+ if (!mem_map_data) {
+ printk("kmalloc of mem_map_data for %d failed\n", size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (copy_from_user(mem_map_data, bufptr, size)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ num_mem_map_data = count;
+
+ /* construct the dummy entry to limit the size of 'next_mmd->mem_map' */
+ /* (see find_local_vaddr() ) */
+ mmd = mem_map_data + (num_mem_map_data - 1);
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ dum_mmd = mmd + 1;
+ *dum_mmd = *mmd;
+ dum_mmd->mem_map += page_section_size;
+
+ /* Fill in the ending address of array of page struct */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ mmd->ending_paddr = mmd->paddr +
+ ((mmd->pfn_end - mmd->pfn_start) * sizeof(struct page));
+ }
+
+ /* Map each section of page structures to local virtual addresses */
+ /* (these are never iounmap'd, as this is the crash kernel) */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ page_section_start = mmd->paddr;
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ mmd->section_vaddr = ioremap_cache(page_section_start,
+ page_section_size);
+ if (!mmd->section_vaddr) {
+ printk(
+ "ioremap_cache of [%d] node %#lx for %#lx failed\n",
+ i, page_section_start, page_section_size);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ /*
+ * allocate the array for PFN's (just once)
+ * get as much as we can, up to what the user specified, and return
+ * that count to the user
+ */
+ pfn_list_elements = reqp->list_size;
+ do {
+ malloc_size = pfn_list_elements * sizeof(struct pfn_element);
+ if ((pfn_list = kmalloc(malloc_size, GFP_KERNEL)) != NULL) {
+ rep.pfn_list_elements = pfn_list_elements;
+ max_pfn_list = pfn_list_elements;
+ goto out;
+ }
+ pfn_list_elements -= 1000;
+ } while (pfn_list == NULL && pfn_list_elements > 0);
+
+ ret = -EINVAL;
+out:
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ return ret;
+}
+
+/*
+ * Return the pfns of to-be-excluded pages fulfilling this request.
+ * This is called for each mem_map in makedumpfile's list.
+ */
+int
+write_vmcore_get_excludes(struct pfn_list_request *reqp)
+{
+ int i;
+ int start = 0;
+ int end;
+ unsigned long paddr;
+ unsigned long pfn;
+ void *vaddr;
+ struct page *pagep;
+ struct pfn_reply rep;
+ struct pfn_element *pe;
+
+ if (!num_mem_map_data) {
+ /* sanity check */
+ printk(
+ "ERROR:PL_REQUEST_MEMMAP not done before PL_REQUEST_EXCLUDE\n");
+ return -EINVAL;
+ }
+
+ /*
+ * the request contains (besides request type and bufptr):
+ * paddr (physical address of the page[0]
+ * count of pages in the block
+ * exclude bits (DL_EXCLUDE_...)
+ */
+ paddr = reqp->paddr;
+ end = reqp->count;
+ pfn = reqp->pfn_start;
+ /* find the already-mapped vaddr of this paddr */
+ vaddr = find_local_from_paddr(paddr);
+ if (!vaddr) {
+ printk("ERROR: PL_REQUEST_EXCLUDE cannot find paddr %#lx\n",
+ paddr);
+ return -EINVAL;
+ }
+ if (reqp->more) {
+ start = reqp->map_index;
+ vaddr += (reqp->map_index * sizeof(struct page));
+ pfn += reqp->map_index;
+ }
+ memset(&rep, 0, sizeof(rep));
+ in_pfn_list = 0;
+
+ for (i = start, pagep = (struct page *)vaddr; i < end;
+ i++, pagep++, pfn++) {
+ if (in_pfn_list == max_pfn_list) {
+ rep.in_pfn_list = in_pfn_list;
+ rep.more = 1;
+ rep.map_index = i;
+ break;
+ }
+ /*
+ * Exclude the free page managed by a buddy
+ */
+ if ((reqp->exclude_bits & DL_EXCLUDE_FREE)
+ && ((pagep->flags & (1UL << PG_slab)) == 0)
+ && (atomic_read(&pagep->_mapcount) ==
+ PAGE_BUDDY_MAPCOUNT_VALUE)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = pagep->private;
+ rep.pfn_free += (1 << pe->order);
+ }
+ /*
+ * Exclude the cache page without the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isPrivate(pagep->flags) && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache++;
+ }
+ /*
+ * Exclude the cache page with the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE_PRI)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache_private++;
+ }
+ /*
+ * Exclude the data page of the user process.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_USER_DATA)
+ && isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_user++;
+ }
+
+ }
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static ssize_t write_vmcore_pfn_lists(struct file *file,
+ const char __user *user_buf, size_t count, loff_t *ppos)
+{
+ int ret;
+ struct pfn_list_request pfn_list_request;
+
+ if (count != sizeof(struct pfn_list_request)) {
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&pfn_list_request, user_buf, count))
+ return -EFAULT;
+
+ if (pfn_list_request.request == PL_REQUEST_FREE) {
+ ret = write_vmcore_get_free(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_EXCLUDE) {
+ ret = write_vmcore_get_excludes(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_MEMMAP) {
+ ret = write_vmcore_get_memmap(&pfn_list_request);
+ } else {
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+ return count;
+}
+
+
static const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
.llseek = default_llseek,
};
+static const struct file_operations proc_vmcore_pfn_lists_operations = {
+ .write = write_vmcore_pfn_lists,
+};
+
static struct vmcore* __init get_new_element(void)
{
return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
@@ -696,6 +1263,10 @@ static int __init vmcore_init(void)
proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
if (proc_vmcore)
proc_vmcore->size = vmcore_size;
+
+ proc_vmcore_pfn_lists = proc_create("vmcore_pfn_lists", S_IWUSR, NULL,
+ &proc_vmcore_pfn_lists_operations);
+
return 0;
}
module_init(vmcore_init)
Index: linux/include/linux/makedumpfile.h
===================================================================
--- /dev/null
+++ linux/include/linux/makedumpfile.h
@@ -0,0 +1,115 @@
+/*
+ * makedumpfile.h
+ * portions Copyright (C) 2006, 2007, 2008, 2009 NEC Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define isLRU(flags) (flags & (1UL << PG_lru))
+#define isPrivate(flags) (flags & (1UL << PG_private))
+#define isSwapCache(flags) (flags & (1UL << PG_swapcache))
+
+static inline int
+isAnon(struct address_space *mapping)
+{
+ return ((unsigned long)mapping & PAGE_MAPPING_ANON) != 0;
+}
+
+#define DL_EXCLUDE_ZERO (0x001) /* Exclude Pages filled with Zeros */
+#define DL_EXCLUDE_CACHE (0x002) /* Exclude Cache Pages
+ without Private Pages */
+#define DL_EXCLUDE_CACHE_PRI (0x004) /* Exclude Cache Pages
+ with Private Pages */
+#define DL_EXCLUDE_USER_DATA (0x008) /* Exclude UserProcessData Pages */
+#define DL_EXCLUDE_FREE (0x010) /* Exclude Free Pages */
+
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negotiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
+ unsigned long long pfn_start;
+ unsigned long long pfn_end;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
+};
[-- Attachment #4: 121207.vmcore_pagescans.rhel --]
[-- Type: text/plain, Size: 21607 bytes --]
Subject: [PATCH] scan page tables for makedumpfile
---
fs/proc/vmcore.c | 568 +++++++++++++++++++++++++++++++++++++++++++
include/linux/makedumpfile.h | 115 ++++++++
2 files changed, 683 insertions(+)
Index: linux/fs/proc/vmcore.c
===================================================================
--- linux.orig/fs/proc/vmcore.c
+++ linux/fs/proc/vmcore.c
@@ -17,8 +17,18 @@
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/list.h>
+#include <linux/makedumpfile.h>
+#include <linux/mmzone.h>
#include <asm/uaccess.h>
#include <asm/io.h>
+#include <asm/page.h>
+static int num_mem_map_data = 0;
+static struct mem_map_data *mem_map_data;
+static struct pfn_element *pfn_list;
+static long in_pfn_list;
+static int last_found_vaddr = 0;
+static int last_found_paddr = 0;
+static int max_pfn_list;
/* List representing chunks of contiguous memory areas and their offsets in
* vmcore file.
@@ -33,6 +43,7 @@ static size_t elfcorebuf_sz;
static u64 vmcore_size;
static struct proc_dir_entry *proc_vmcore = NULL;
+static struct proc_dir_entry *proc_vmcore_pfn_lists = NULL;
/* Reads a page from the oldmem device from given offset. */
static ssize_t read_from_oldmem(char *buf, size_t count,
@@ -160,10 +171,563 @@ static ssize_t read_vmcore(struct file *
return acc;
}
+/*
+ * Given the boot-kernel-relative virtual address of a page
+ * return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+unsigned long
+find_local_vaddr(unsigned long orig_vaddr)
+{
+ int i;
+ int fnd = 0;
+ struct mem_map_data *mmd, *next_mmd;
+ unsigned long paddr;
+ unsigned long local_vaddr;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_vaddr, mmd = mem_map_data + last_found_vaddr,
+ next_mmd = mem_map_data + last_found_vaddr + 1;
+ i < num_mem_map_data; i++, mmd++, next_mmd++) {
+ if (mmd->mem_map && mmd->paddr) {
+ if (orig_vaddr >= mmd->mem_map &&
+ orig_vaddr < next_mmd->mem_map) {
+ offset = orig_vaddr - mmd->mem_map;
+ paddr = mmd->paddr + offset;
+ fnd++;
+ /* caching gives about 99% hit on first pass */
+ last_found_vaddr = i;
+ break;
+ }
+ }
+ }
+
+ if (! fnd) {
+ if (last_found_vaddr > 0) {
+ last_found_vaddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+ }
+
+ /* paddr is now the physical address of the page structure */
+ /* and offset is the offset into the found section, and we have
+ a table of how those sections are ioremap_cache'd */
+ local_vaddr = (unsigned long)mmd->section_vaddr + offset;
+ return local_vaddr;
+}
+
+/*
+ * Given a paddr, return its crashkernel-relative virtual address.
+ *
+ * We have a memory map named mem_map_data
+ *
+ * return 0 if it cannot be found
+ */
+void *
+find_local_from_paddr(unsigned long paddr)
+{
+ int i;
+ struct mem_map_data *mmd;
+ unsigned long offset;
+
+ if (!num_mem_map_data) {
+ printk("find_page_paddr !! num_mem_map_data is %d\n",
+ num_mem_map_data);
+ return 0;
+ }
+
+fullsearch:
+ for (i = last_found_paddr, mmd = mem_map_data + last_found_paddr;
+ i < num_mem_map_data; i++, mmd++) {
+ if ((paddr >= mmd->paddr) && (paddr < mmd->ending_paddr)) {
+ offset = paddr - mmd->paddr;
+ last_found_paddr = i;
+ /* caching gives about 98% hit on first pass */
+ return (void *)(mmd->section_vaddr + offset);
+ }
+ }
+
+ if (last_found_paddr > 0) {
+ last_found_paddr = 0;
+ goto fullsearch;
+ }
+ return 0;
+}
+
+/*
+ * given an anchoring list_head, walk the list of free pages
+ * 'root' is a virtual address based on the ioremap_cache'd pointer pgp
+ * 'boot_root' is the virtual address of the list root, boot kernel relative
+ *
+ * return the number of pages found on the list
+ */
+int
+walk_freelist(struct list_head *root, int node, int zone, int order, int list,
+ int restart_list, int start_page, struct pfn_list_request *reqp,
+ struct pfn_reply *replyp, struct list_head *boot_root)
+{
+ int list_ct = 0;
+ int list_free_pages = 0;
+ int doit;
+ unsigned long start_pfn;
+ struct page *pagep;
+ struct page *local_pagep;
+ struct list_head *lhp;
+ struct list_head *local_lhp; /* crashkernel-relative */
+ struct list_head *prev;
+ struct pfn_element *pe;
+
+ /*
+ * root is the crashkernel-relative address of the anchor of the
+ * free_list.
+ */
+ prev = root;
+ if (root == NULL) {
+ printk(KERN_EMERG "root is null!!, node %d order %d\n",
+ node, order);
+ return 0;
+ }
+
+ if (root->next == boot_root)
+ /* list is empty */
+ return 0;
+
+ lhp = root->next;
+ local_lhp = (struct list_head *)find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp) {
+ return 0;
+ }
+
+ while (local_lhp != boot_root) {
+ list_ct++;
+ if (lhp == NULL) {
+ printk(KERN_EMERG
+ "The free list has a null!!, node %d order %d\n",
+ node, order);
+ break;
+ }
+ if (list_ct > 1 && local_lhp->prev != prev) {
+ /* can't be compared to root, as that is local */
+ printk(KERN_EMERG "The free list is broken!!\n");
+ break;
+ }
+
+ /* we want the boot kernel's pfn that this page represents */
+ pagep = container_of((struct list_head *)lhp,
+ struct page, lru);
+ start_pfn = pagep - vmemmap;
+ local_pagep = container_of((struct list_head *)local_lhp,
+ struct page, lru);
+ doit = 1;
+ if (restart_list && list_ct < start_page)
+ doit = 0;
+ if (doit) {
+ if (in_pfn_list == max_pfn_list) {
+ /* if array would overflow, come back to
+ this page with a continuation */
+ replyp->more = 1;
+ replyp->zone_index = zone;
+ replyp->freearea_index = order;
+ replyp->type_index = list;
+ replyp->list_ct = list_ct;
+ goto list_is_full;
+ }
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = start_pfn;
+ pe->order = order;
+ list_free_pages += (1 << order);
+ }
+ prev = lhp;
+ lhp = local_pagep->lru.next;
+ /* the local node-relative vaddr: */
+ local_lhp = (struct list_head *)
+ find_local_vaddr((unsigned long)lhp);
+ if (!local_lhp)
+ break;
+ }
+
+list_is_full:
+ return list_free_pages;
+}
+
+/*
+ * Return the pfns of free pages on this node
+ */
+int
+write_vmcore_get_free(struct pfn_list_request *reqp)
+{
+ int node;
+ int nr_zones;
+ int nr_orders = MAX_ORDER;
+ int nr_freelist = MIGRATE_TYPES;
+ int zone;
+ int order;
+ int list;
+ int start_zone = 0;
+ int start_order = 0;
+ int start_list = 0;
+ int ret;
+ int restart = 0;
+ int start_page = 0;
+ int node_free_pages = 0;
+ struct pfn_reply rep;
+ struct pglist_data *pgp;
+ struct zone *zonep;
+ struct free_area *fap;
+ struct list_head *flp;
+ struct list_head *boot_root;
+ unsigned long pgdat_paddr;
+ unsigned long pgdat_vaddr;
+ unsigned long page_aligned_pgdat;
+ unsigned long page_aligned_size;
+ void *mapped_vaddr;
+
+ node = reqp->node;
+ pgdat_paddr = reqp->pgdat_paddr;
+ pgdat_vaddr = reqp->pgdat_vaddr;
+
+ /* map this pglist_data structure within a page-aligned area */
+ page_aligned_pgdat = pgdat_paddr & ~(PAGE_SIZE - 1);
+ page_aligned_size = sizeof(struct pglist_data) +
+ (pgdat_paddr - page_aligned_pgdat);
+ page_aligned_size = ((page_aligned_size + (PAGE_SIZE - 1))
+ >> PAGE_SHIFT) << PAGE_SHIFT;
+ mapped_vaddr = ioremap_cache(page_aligned_pgdat, page_aligned_size);
+ if (!mapped_vaddr) {
+ printk("ioremap_cache of pgdat %#lx failed\n",
+ page_aligned_pgdat);
+ return -EINVAL;
+ }
+ pgp = (struct pglist_data *)(mapped_vaddr +
+ (pgdat_paddr - page_aligned_pgdat));
+ nr_zones = pgp->nr_zones;
+ memset(&rep, 0, sizeof(rep));
+
+ if (reqp->more) {
+ restart = 1;
+ start_zone = reqp->zone_index;
+ start_order = reqp->freearea_index;
+ start_list = reqp->type_index;
+ start_page = reqp->list_ct;
+ }
+
+ in_pfn_list = 0;
+ for (zone = start_zone; zone < nr_zones; zone++) {
+ zonep = &pgp->node_zones[zone];
+ for (order = start_order; order < nr_orders; order++) {
+ fap = &zonep->free_area[order];
+ /* some free_area's are all zero */
+ if (fap->nr_free) {
+ for (list = start_list; list < nr_freelist;
+ list++) {
+ flp = &fap->free_list[list];
+ boot_root = (struct list_head *)
+ (pgdat_vaddr +
+ ((unsigned long)flp -
+ (unsigned long)pgp));
+ ret = walk_freelist(flp, node, zone,
+ order, list, restart,
+ start_page, reqp, &rep,
+ boot_root);
+ node_free_pages += ret;
+ restart = 0;
+ if (rep.more)
+ goto list_full;
+ }
+ }
+ }
+ }
+list_full:
+
+ iounmap(mapped_vaddr);
+
+ /* copy the reply and the valid part of our pfn list to the user */
+ rep.pfn_free = node_free_pages; /* the total, for statistics */
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+/*
+ * Get the memap_data table from makedumpfile
+ * and do the single allocate of the pfn_list.
+ */
+int
+write_vmcore_get_memmap(struct pfn_list_request *reqp)
+{
+ int i;
+ int count;
+ int size;
+ int ret = 0;
+ long pfn_list_elements;
+ long malloc_size;
+ unsigned long page_section_start;
+ unsigned long page_section_size;
+ struct mem_map_data *mmd, *dum_mmd;
+ struct pfn_reply rep;
+ void *bufptr;
+
+ rep.pfn_list_elements = 0;
+ if (num_mem_map_data) {
+ /* shouldn't have been done before, but if it was.. */
+ printk(KERN_INFO "warning: PL_REQUEST_MEMMAP is repeated\n");
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data;
+ i++, mmd++) {
+ iounmap(mmd->section_vaddr);
+ }
+ kfree(mem_map_data);
+ mem_map_data = NULL;
+ num_mem_map_data = 0;
+ kfree(pfn_list);
+ pfn_list = NULL;
+ }
+
+ count = reqp->map_count;
+ size = reqp->map_size;
+ bufptr = reqp->map_ptr;
+ if (size != (count * sizeof(struct mem_map_data))) {
+ printk("Error in mem_map_data, %d * %ld != %d\n",
+ count, sizeof(struct mem_map_data), size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* add a dummy at the end to limit the size of the last entry */
+ size += sizeof(struct mem_map_data);
+
+ mem_map_data = kzalloc(size, GFP_KERNEL);
+ if (!mem_map_data) {
+ printk("kmalloc of mem_map_data for %d failed\n", size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (copy_from_user(mem_map_data, bufptr, size)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ num_mem_map_data = count;
+
+ /* construct the dummy entry to limit the size of 'next_mmd->mem_map' */
+ /* (see find_local_vaddr() ) */
+ mmd = mem_map_data + (num_mem_map_data - 1);
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ dum_mmd = mmd + 1;
+ *dum_mmd = *mmd;
+ dum_mmd->mem_map += page_section_size;
+
+ /* Fill in the ending address of array of page struct */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ mmd->ending_paddr = mmd->paddr +
+ ((mmd->pfn_end - mmd->pfn_start) * sizeof(struct page));
+ }
+
+ /* Map each section of page structures to local virtual addresses */
+ /* (these are never iounmap'd, as this is the crash kernel) */
+ for (i = 0, mmd = mem_map_data; i < num_mem_map_data; i++, mmd++) {
+ page_section_start = mmd->paddr;
+ page_section_size = (mmd->pfn_end - mmd->pfn_start) *
+ sizeof(struct page);
+ mmd->section_vaddr = ioremap_cache(page_section_start,
+ page_section_size);
+ if (!mmd->section_vaddr) {
+ printk(
+ "ioremap_cache of [%d] node %#lx for %#lx failed\n",
+ i, page_section_start, page_section_size);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ /*
+ * allocate the array for PFN's (just once)
+ * get as much as we can, up to what the user specified, and return
+ * that count to the user
+ */
+ pfn_list_elements = reqp->list_size;
+ do {
+ malloc_size = pfn_list_elements * sizeof(struct pfn_element);
+ if ((pfn_list = kmalloc(malloc_size, GFP_KERNEL)) != NULL) {
+ rep.pfn_list_elements = pfn_list_elements;
+ max_pfn_list = pfn_list_elements;
+ goto out;
+ }
+ pfn_list_elements -= 1000;
+ } while (pfn_list == NULL && pfn_list_elements > 0);
+
+ ret = -EINVAL;
+out:
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ return ret;
+}
+
+/*
+ * Return the pfns of to-be-excluded pages fulfilling this request.
+ * This is called for each mem_map in makedumpfile's list.
+ */
+int
+write_vmcore_get_excludes(struct pfn_list_request *reqp)
+{
+ int i;
+ int start = 0;
+ int end;
+ unsigned long paddr;
+ unsigned long pfn;
+ void *vaddr;
+ struct page *pagep;
+ struct pfn_reply rep;
+ struct pfn_element *pe;
+
+ if (!num_mem_map_data) {
+ /* sanity check */
+ printk(
+ "ERROR:PL_REQUEST_MEMMAP not done before PL_REQUEST_EXCLUDE\n");
+ return -EINVAL;
+ }
+
+ /*
+ * the request contains (besides request type and bufptr):
+ * paddr (physical address of the page[0]
+ * count of pages in the block
+ * exclude bits (DL_EXCLUDE_...)
+ */
+ paddr = reqp->paddr;
+ end = reqp->count;
+ pfn = reqp->pfn_start;
+ /* find the already-mapped vaddr of this paddr */
+ vaddr = find_local_from_paddr(paddr);
+ if (!vaddr) {
+ printk("ERROR: PL_REQUEST_EXCLUDE cannot find paddr %#lx\n",
+ paddr);
+ return -EINVAL;
+ }
+ if (reqp->more) {
+ start = reqp->map_index;
+ vaddr += (reqp->map_index * sizeof(struct page));
+ pfn += reqp->map_index;
+ }
+ memset(&rep, 0, sizeof(rep));
+ in_pfn_list = 0;
+
+ for (i = start, pagep = (struct page *)vaddr; i < end;
+ i++, pagep++, pfn++) {
+ if (in_pfn_list == max_pfn_list) {
+ rep.in_pfn_list = in_pfn_list;
+ rep.more = 1;
+ rep.map_index = i;
+ break;
+ }
+ /*
+ * Exclude the free page managed by a buddy
+ */
+ if ((reqp->exclude_bits & DL_EXCLUDE_FREE)
+ && (pagep->flags & (1UL << PG_buddy))) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = pagep->private;
+ rep.pfn_free += (1 << pe->order);
+ }
+ /*
+ * Exclude the cache page without the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isPrivate(pagep->flags) && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache++;
+ }
+ /*
+ * Exclude the cache page with the private page.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_CACHE_PRI)
+ && (isLRU(pagep->flags) || isSwapCache(pagep->flags))
+ && !isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_cache_private++;
+ }
+ /*
+ * Exclude the data page of the user process.
+ */
+ else if ((reqp->exclude_bits & DL_EXCLUDE_USER_DATA)
+ && isAnon(pagep->mapping)) {
+ pe = &pfn_list[in_pfn_list++];
+ pe->pfn = pfn;
+ pe->order = 0; /* assume 4k */
+ rep.pfn_user++;
+ }
+
+ }
+ rep.in_pfn_list = in_pfn_list;
+ if (copy_to_user(reqp->reply_ptr, &rep, sizeof(struct pfn_reply)))
+ return -EFAULT;
+ if (in_pfn_list) {
+ if (copy_to_user(reqp->pfn_list_ptr, pfn_list,
+ (in_pfn_list * sizeof(struct pfn_element))))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static ssize_t write_vmcore_pfn_lists(struct file *file,
+ const char __user *user_buf, size_t count, loff_t *ppos)
+{
+ int ret;
+ struct pfn_list_request pfn_list_request;
+
+ if (count != sizeof(struct pfn_list_request)) {
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&pfn_list_request, user_buf, count))
+ return -EFAULT;
+
+ if (pfn_list_request.request == PL_REQUEST_FREE) {
+ ret = write_vmcore_get_free(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_EXCLUDE) {
+ ret = write_vmcore_get_excludes(&pfn_list_request);
+ } else if (pfn_list_request.request == PL_REQUEST_MEMMAP) {
+ ret = write_vmcore_get_memmap(&pfn_list_request);
+ } else {
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+ return count;
+}
+
static const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
};
+static const struct file_operations proc_vmcore_pfn_lists_operations = {
+ .write = write_vmcore_pfn_lists,
+};
+
static struct vmcore* __init get_new_element(void)
{
return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
@@ -648,6 +1212,10 @@ static int __init vmcore_init(void)
proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
if (proc_vmcore)
proc_vmcore->size = vmcore_size;
+
+ proc_vmcore_pfn_lists = proc_create("vmcore_pfn_lists", S_IWUSR, NULL,
+ &proc_vmcore_pfn_lists_operations);
+
return 0;
}
module_init(vmcore_init)
Index: linux/include/linux/makedumpfile.h
===================================================================
--- /dev/null
+++ linux/include/linux/makedumpfile.h
@@ -0,0 +1,115 @@
+/*
+ * makedumpfile.h
+ * portions Copyright (C) 2006, 2007, 2008, 2009 NEC Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define isLRU(flags) (flags & (1UL << PG_lru))
+#define isPrivate(flags) (flags & (1UL << PG_private))
+#define isSwapCache(flags) (flags & (1UL << PG_swapcache))
+
+static inline int
+isAnon(struct address_space *mapping)
+{
+ return ((unsigned long)mapping & PAGE_MAPPING_ANON) != 0;
+}
+
+#define DL_EXCLUDE_ZERO (0x001) /* Exclude Pages filled with Zeros */
+#define DL_EXCLUDE_CACHE (0x002) /* Exclude Cache Pages
+ without Private Pages */
+#define DL_EXCLUDE_CACHE_PRI (0x004) /* Exclude Cache Pages
+ with Private Pages */
+#define DL_EXCLUDE_USER_DATA (0x008) /* Exclude UserProcessData Pages */
+#define DL_EXCLUDE_FREE (0x010) /* Exclude Free Pages */
+
+#define PL_REQUEST_FREE 1 /* request for a list of free pages */
+#define PL_REQUEST_EXCLUDE 2 /* request for a list of excludable
+ pages */
+#define PL_REQUEST_MEMMAP 3 /* request to pass in the makedumpfile
+ mem_map_data table */
+/*
+ * a request for finding pfn's that can be excluded from the dump
+ * they may be pages of particular types or free pages
+ */
+struct pfn_list_request {
+ int request; /* PL_REQUEST_FREE PL_REQUEST_EXCLUDE or */
+ /* PL_REQUEST_MEMMAP */
+ int debug;
+ unsigned long paddr; /* mem_map address for PL_REQUEST_EXCLUDE */
+ unsigned long pfn_start;/* pfn represented by paddr */
+ unsigned long pgdat_paddr; /* for PL_REQUEST_FREE */
+ unsigned long pgdat_vaddr; /* for PL_REQUEST_FREE */
+ int node; /* for PL_REQUEST_FREE */
+ int exclude_bits; /* for PL_REQUEST_EXCLUDE */
+ int count; /* for PL_REQUEST_EXCLUDE */
+ void *reply_ptr; /* address of user's pfn_reply, for reply */
+ void *pfn_list_ptr; /* address of user's pfn array (*pfn_list) */
+ int map_count; /* for PL_REQUEST_MEMMAP; elements */
+ int map_size; /* for PL_REQUEST_MEMMAP; bytes in table */
+ void *map_ptr; /* for PL_REQUEST_MEMMAP; address of table */
+ long list_size; /* for PL_REQUEST_MEMMAP negotiation */
+ /* resume info: */
+ int more; /* 0 for done, 1 for "there's more" */
+ /* PL_REQUEST_EXCLUDE: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+};
+
+/*
+ * the reply from a pfn_list_request
+ * the list of pfn's itself is pointed to by pfn_list
+ */
+struct pfn_reply {
+ long pfn_list_elements; /* negotiated on PL_REQUEST_MEMMAP */
+ long in_pfn_list; /* returned by PL_REQUEST_EXCLUDE and
+ PL_REQUEST_FREE */
+ /* resume info */
+ int more; /* 0 == done, 1 == there is more */
+ /* PL_REQUEST_MEMMAP: */
+ int map_index; /* slot in the mem_map array of page structs */
+ /* PL_REQUEST_FREE: */
+ int zone_index; /* zone within the node's pgdat_list */
+ int freearea_index; /* free_area within the zone */
+ int type_index; /* free_list within the free_area */
+ int list_ct; /* page within the list */
+ /* statistic counters: */
+ unsigned long long pfn_cache; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_cache_private; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_user; /* PL_REQUEST_EXCLUDE */
+ unsigned long long pfn_free; /* PL_REQUEST_FREE */
+};
+
+struct pfn_element {
+ unsigned long pfn;
+ unsigned long order;
+};
+
+struct mem_map_data {
+ /*
+ * pfn_start/pfn_end are the pfn's represented by this mem_map entry.
+ * mem_map is the virtual address of the array of page structures
+ * that represent these pages.
+ * paddr is the physical address of that array of structures.
+ * ending_paddr would be (pfn_end - pfn_start) * sizeof(struct page).
+ * section_vaddr is the address we get from ioremap_cache().
+ */
+ unsigned long long pfn_start;
+ unsigned long long pfn_end;
+ unsigned long mem_map;
+ unsigned long long paddr; /* filled in by makedumpfile */
+ unsigned long long ending_paddr; /* filled in by kernel */
+ void *section_vaddr; /* filled in by kernel */
+};
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] makedumpfile: request the kernel do page scans
2012-12-10 15:36 ` Cliff Wickman
@ 2012-12-20 3:22 ` HATAYAMA Daisuke
2012-12-20 15:51 ` Cliff Wickman
0 siblings, 1 reply; 7+ messages in thread
From: HATAYAMA Daisuke @ 2012-12-20 3:22 UTC (permalink / raw)
To: cpw; +Cc: kexec, ptesarik, linux-kernel, kumagai-atsushi, vgoyal
From: Cliff Wickman <cpw@sgi.com>
Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
Date: Mon, 10 Dec 2012 09:36:14 -0600
> On Mon, Dec 10, 2012 at 09:59:29AM +0900, HATAYAMA Daisuke wrote:
>> From: Cliff Wickman <cpw@sgi.com>
>> Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
>> Date: Mon, 19 Nov 2012 12:07:10 -0600
>>
>> > On Fri, Nov 16, 2012 at 03:39:44PM -0500, Vivek Goyal wrote:
>> >> On Thu, Nov 15, 2012 at 04:52:40PM -0600, Cliff Wickman wrote:
>
> Hi Hatayama,
>
> If ioremap/iounmap is the bottleneck then perhaps you could do what
> my patch does: it consolidates all the ranges of physical addresses
> where the boot kernel's page structures reside (see make_kernel_mmap())
> and passes them to the kernel, which then does a handfull of ioremaps's to
> cover all of them. Then /proc/vmcore could look up the already-mapped
> virtual address.
> (also note a kludge in get_mm_sparsemem() that verifies that each section
> of the mem_map spans contiguous ranges of page structures. I had
> trouble with some sections when I made that assumption)
>
> I'm attaching 3 patches that might be useful in your testing:
> - 121210.proc_vmcore2 my current patch that applies to the released
> makedumpfile 1.5.1
> - 121207.vmcore_pagescans.sles applies to a 3.0.13 kernel
> - 121207.vmcore_pagescans.rhel applies to a 2.6.32 kernel
>
I used the same patch set on the benchmark.
BTW, I have continuously reservation issue, so I think I cannot use
terabyte memory machine at least in this year.
Also, your patch set is doing ioremap per a chunk of memory map,
i.e. a number of consequtive pages at the same time. On your terabyte
machines, how large they are? We have memory consumption issue on the
2nd kernel so we must decrease amount of memory used. But looking into
ioremap code quickly, it looks not using 2MB or 1GB pages to
remap. This means more than tera bytes page table is generated. Or
have you probably already investigated this?
BTW, my idea to solve this issue are two:
1) make linear direct mapping for old memory, and acess the old memory
via the linear direct mapping, not by ioremap.
- adding remap code in vmcore, or passing the regions that need to
be remapped using memmap= kernel option to tell the 2nd kenrel to
map them in addition.
Or,
2) Support 2MB or 1GB pages in ioremap.
Thanks.
HATAYAMA, Daisuke
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] makedumpfile: request the kernel do page scans
2012-12-20 3:22 ` HATAYAMA Daisuke
@ 2012-12-20 15:51 ` Cliff Wickman
2012-12-21 1:35 ` HATAYAMA Daisuke
0 siblings, 1 reply; 7+ messages in thread
From: Cliff Wickman @ 2012-12-20 15:51 UTC (permalink / raw)
To: HATAYAMA Daisuke; +Cc: kexec, ptesarik, linux-kernel, kumagai-atsushi, vgoyal
On Thu, Dec 20, 2012 at 12:22:14PM +0900, HATAYAMA Daisuke wrote:
> From: Cliff Wickman <cpw@sgi.com>
> Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
> Date: Mon, 10 Dec 2012 09:36:14 -0600
> > On Mon, Dec 10, 2012 at 09:59:29AM +0900, HATAYAMA Daisuke wrote:
> >> From: Cliff Wickman <cpw@sgi.com>
> >> Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
> >> Date: Mon, 19 Nov 2012 12:07:10 -0600
> >>
> >> > On Fri, Nov 16, 2012 at 03:39:44PM -0500, Vivek Goyal wrote:
> >> >> On Thu, Nov 15, 2012 at 04:52:40PM -0600, Cliff Wickman wrote:
> >
> > Hi Hatayama,
> >
> > If ioremap/iounmap is the bottleneck then perhaps you could do what
> > my patch does: it consolidates all the ranges of physical addresses
> > where the boot kernel's page structures reside (see make_kernel_mmap())
> > and passes them to the kernel, which then does a handfull of ioremaps's to
> > cover all of them. Then /proc/vmcore could look up the already-mapped
> > virtual address.
> > (also note a kludge in get_mm_sparsemem() that verifies that each section
> > of the mem_map spans contiguous ranges of page structures. I had
> > trouble with some sections when I made that assumption)
> >
> > I'm attaching 3 patches that might be useful in your testing:
> > - 121210.proc_vmcore2 my current patch that applies to the released
> > makedumpfile 1.5.1
> > - 121207.vmcore_pagescans.sles applies to a 3.0.13 kernel
> > - 121207.vmcore_pagescans.rhel applies to a 2.6.32 kernel
> >
>
> I used the same patch set on the benchmark.
>
> BTW, I have continuously reservation issue, so I think I cannot use
> terabyte memory machine at least in this year.
>
> Also, your patch set is doing ioremap per a chunk of memory map,
> i.e. a number of consequtive pages at the same time. On your terabyte
> machines, how large they are? We have memory consumption issue on the
> 2nd kernel so we must decrease amount of memory used. But looking into
> ioremap code quickly, it looks not using 2MB or 1GB pages to
> remap. This means more than tera bytes page table is generated. Or
> have you probably already investigated this?
>
> BTW, my idea to solve this issue are two:
>
> 1) make linear direct mapping for old memory, and acess the old memory
> via the linear direct mapping, not by ioremap.
>
> - adding remap code in vmcore, or passing the regions that need to
> be remapped using memmap= kernel option to tell the 2nd kenrel to
> map them in addition.
Good point. It would take over 30G of memory to map 16TB with 4k pages.
I recently tried to dump such a memory and ran out of kernel memory --
no wonder!
Do you have a patch for doing a linear direct mapping? Or can you name
existing kernel infrastructure to do such mapping? I'm just looking for
a jumpstart to enhance the patch.
-Cliff
>
> Or,
>
> 2) Support 2MB or 1GB pages in ioremap.
>
> Thanks.
> HATAYAMA, Daisuke
--
Cliff Wickman
SGI
cpw@sgi.com
(651) 683-3824
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] makedumpfile: request the kernel do page scans
2012-12-20 15:51 ` Cliff Wickman
@ 2012-12-21 1:35 ` HATAYAMA Daisuke
0 siblings, 0 replies; 7+ messages in thread
From: HATAYAMA Daisuke @ 2012-12-21 1:35 UTC (permalink / raw)
To: cpw; +Cc: kexec, ptesarik, linux-kernel, kumagai-atsushi, vgoyal
From: Cliff Wickman <cpw@sgi.com>
Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
Date: Thu, 20 Dec 2012 09:51:47 -0600
> On Thu, Dec 20, 2012 at 12:22:14PM +0900, HATAYAMA Daisuke wrote:
>> From: Cliff Wickman <cpw@sgi.com>
>> Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
>> Date: Mon, 10 Dec 2012 09:36:14 -0600
>> > On Mon, Dec 10, 2012 at 09:59:29AM +0900, HATAYAMA Daisuke wrote:
>> >> From: Cliff Wickman <cpw@sgi.com>
>> >> Subject: Re: [PATCH] makedumpfile: request the kernel do page scans
>> >> Date: Mon, 19 Nov 2012 12:07:10 -0600
>> >>
>> >> > On Fri, Nov 16, 2012 at 03:39:44PM -0500, Vivek Goyal wrote:
>> >> >> On Thu, Nov 15, 2012 at 04:52:40PM -0600, Cliff Wickman wrote:
>> >
>> > Hi Hatayama,
>> >
>> > If ioremap/iounmap is the bottleneck then perhaps you could do what
>> > my patch does: it consolidates all the ranges of physical addresses
>> > where the boot kernel's page structures reside (see make_kernel_mmap())
>> > and passes them to the kernel, which then does a handfull of ioremaps's to
>> > cover all of them. Then /proc/vmcore could look up the already-mapped
>> > virtual address.
>> > (also note a kludge in get_mm_sparsemem() that verifies that each section
>> > of the mem_map spans contiguous ranges of page structures. I had
>> > trouble with some sections when I made that assumption)
>> >
>> > I'm attaching 3 patches that might be useful in your testing:
>> > - 121210.proc_vmcore2 my current patch that applies to the released
>> > makedumpfile 1.5.1
>> > - 121207.vmcore_pagescans.sles applies to a 3.0.13 kernel
>> > - 121207.vmcore_pagescans.rhel applies to a 2.6.32 kernel
>> >
>>
>> I used the same patch set on the benchmark.
>>
>> BTW, I have continuously reservation issue, so I think I cannot use
>> terabyte memory machine at least in this year.
>>
>> Also, your patch set is doing ioremap per a chunk of memory map,
>> i.e. a number of consequtive pages at the same time. On your terabyte
>> machines, how large they are? We have memory consumption issue on the
>> 2nd kernel so we must decrease amount of memory used. But looking into
>> ioremap code quickly, it looks not using 2MB or 1GB pages to
>> remap. This means more than tera bytes page table is generated. Or
>> have you probably already investigated this?
>>
>> BTW, my idea to solve this issue are two:
>>
>> 1) make linear direct mapping for old memory, and acess the old memory
>> via the linear direct mapping, not by ioremap.
>>
>> - adding remap code in vmcore, or passing the regions that need to
>> be remapped using memmap= kernel option to tell the 2nd kenrel to
>> map them in addition.
>
> Good point. It would take over 30G of memory to map 16TB with 4k pages.
> I recently tried to dump such a memory and ran out of kernel memory --
> no wonder!
>
One question. Now, on terabyte memory machine, your patch set always
goes into out of kernel memory and panic when writing pages, right?
Only scanning mem_map array can complete.
> Do you have a patch for doing a linear direct mapping? Or can you name
> existing kernel infrastructure to do such mapping? I'm just looking for
> a jumpstart to enhance the patch.
I have a prototype patch only. See the patch at the end of this mail,
which tries to creates linear direct mapping using
init_memory_mapping() which supports 2MB and 1GB pages. We can see
what kind of pages are used from dmesg:
$ dmesg
...
initial memory mapped: [mem 0x00000000-0x1fffffff]
Base memory trampoline at [ffff880000094000] 94000 size 28672
Using GB pages for direct mapping
init_memory_mapping: [mem 0x00000000-0x7b00cfff] <-- here
[mem 0x00000000-0x3fffffff] page 1G
[mem 0x40000000-0x7affffff] page 2M
[mem 0x7b000000-0x7b00cfff] page 4k
kernel direct mapping tables up to 0x7b00cfff @ [mem 0x1fffd000-0x1fffffff]
init_memory_mapping: [mem 0x100000000-0x87fffffff] <-- here
[mem 0x100000000-0x87fffffff] page 1G
kernel direct mapping tables up to 0x87fffffff @ [mem 0x7b00c000-0x7b00cfff]
RAMDISK: [mem 0x37406000-0x37feffff]
Reserving 256MB of memory at 624MB for crashkernel (System RAM: 32687MB)
The source of memory mapping information is PT_LOAD entries of
/proc/vmcore, which is in vmcore_list defined in vmcore.c. This is
"adding remap code in vmcore" idea above. Still existing
copy_old_memory() is being left to read ELF headers.
Unfortunately, this patch is still really buggy. I saw the dump was
generated correctly on my small 1GB kvm guest machine, but some
scheduler bug occurred on the 32GB native machine which is the same as
I used for profiling your patch set.
The second idea passing memmap= kernel option is just like below.
kexec passes specific memory map information to the 2nd kenrel using
memmap= kernel parameter; maybe, only '#' is being used in
kexec. Different delimitor means different manings. '@' means System
RAM, '#' means ACPI Table and '$' means "don't use this memory".
memmap=nn[KMG]@ss[KMG]
[KNL] Force usage of a specific region of memory
Region of memory to be used, from ss to ss+nn.
memmap=nn[KMG]#ss[KMG]
[KNL,ACPI] Mark specific memory as ACPI data.
Region of memory to be used, from ss to ss+nn.
memmap=nn[KMG]$ss[KMG]
[KNL,ACPI] Mark specific memory as reserved.
Region of memory to be used, from ss to ss+nn.
Example: Exclude memory from 0x18690000-0x1869ffff
memmap=64K$0x18690000
or
memmap=0x10000$0x18690000
Like this, why not introducing another memmap to tell the 2nd kenrel
to make linear mapping address on boot. Or maybe it's sufficient for
this issue to use any of the above three kinds of memmap=.
Thanks.
HATAYAMA, Daisuke
>From a840d882a5fbef56e9c335dd74ce9a6fe858cfc1 Mon Sep 17 00:00:00 2001
From: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Date: Sat, 15 Dec 2012 22:49:31 +0900
Subject: [PATCH] kdump, vmcore: create linear direct mapping for old memory
[Warning: This is very experimental buggy patch!]
On the current implementation of /proc/vmcore, memory on the 2nd
kernel, called old memory in the code around, is read through ioremap
per pages, which is causing big performance impact on terabyte class
machines.
To address the issue, it's not enough to change of ioremap unit size
from a page to larger one since ioremap doesn't use 1GB or 2MB pages
on mapping --- I guess vast majority of ioremap users doesn't need to
map such a large memory. On giga byte memory machine, this leads to
giga byte page table.
Instead, this patch makes linear direct address for the old memory,
which supports 1GB and 2MB pages. There's less risk than ioremap due
to page table memory consumption.
Note:
Currently, I confirmed this patch worked weell only on small 1GB
memory kvm guest machine. On 32GB memory machine, I encountered some
kind of scheduler BUG during the boot of 2nd kernel. Obviously, I
guess my code is doing some wrong things around init_memory_mapping.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
---
fs/proc/vmcore.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 66 insertions(+), 2 deletions(-)
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 0d5071d..739bd04 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -116,6 +116,49 @@ static ssize_t read_from_oldmem(char *buf, size_t count,
return read;
}
+/* Reads a page from the oldmem device from given offset. */
+static ssize_t read_from_oldmem_noioremap(char *buf, size_t count,
+ u64 *ppos, int userbuf)
+{
+ unsigned long pfn, offset;
+ size_t nr_bytes;
+ ssize_t read = 0;
+
+ if (!count)
+ return 0;
+
+ offset = (unsigned long)(*ppos % PAGE_SIZE);
+ pfn = (unsigned long)(*ppos / PAGE_SIZE);
+
+ do {
+ if (count > (PAGE_SIZE - offset))
+ nr_bytes = PAGE_SIZE - offset;
+ else
+ nr_bytes = count;
+
+ /* If pfn is not ram, return zeros for sparse dump files */
+ if (pfn_is_ram(pfn) == 0)
+ memset(buf, 0, nr_bytes);
+ else {
+ void *vaddr = pfn_to_kaddr(pfn);
+
+ if (userbuf) {
+ if (copy_to_user(buf, vaddr + offset, nr_bytes))
+ return -EFAULT;
+ } else
+ memcpy(buf, vaddr + offset, nr_bytes);
+ }
+ *ppos += nr_bytes;
+ count -= nr_bytes;
+ buf += nr_bytes;
+ read += nr_bytes;
+ ++pfn;
+ offset = 0;
+ } while (count);
+
+ return read;
+}
+
/* Maps vmcore file offset to respective physical address in memroy. */
static u64 map_offset_to_paddr(loff_t offset, struct list_head *vc_list,
struct vmcore **m_ptr)
@@ -137,6 +180,22 @@ static u64 map_offset_to_paddr(loff_t offset, struct list_head *vc_list,
return 0;
}
+static void init_memory_mapping_oldmem(struct list_head *vc_list)
+{
+ struct vmcore *m;
+
+ list_for_each_entry(m, vc_list, list) {
+ unsigned long last_mapped_pfn;
+
+ last_mapped_pfn = init_memory_mapping(m->paddr,
+ m->paddr + m->size);
+ if (last_mapped_pfn > max_pfn_mapped)
+ max_pfn_mapped = last_mapped_pfn;
+ printk("vmcore: map %016llx-%016llx\n",
+ m->paddr, m->paddr + m->size - 1);
+ }
+}
+
/* Read from the ELF header and then the crash dump. On error, negative value is
* returned otherwise number of bytes read are returned.
*/
@@ -184,9 +243,11 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
tsz = nr_bytes;
while (buflen) {
- tmp = read_from_oldmem(buffer, tsz, &start, 1);
- if (tmp < 0)
+ tmp = read_from_oldmem_noioremap(buffer, tsz, &start, 1);
+ if (tmp < 0) {
+ printk("vmcore: failed to read oldmem: %016llx\n", start);
return tmp;
+ }
buflen -= tsz;
*fpos += tsz;
buffer += tsz;
@@ -677,6 +738,9 @@ static int __init parse_crash_elf_headers(void)
" sane\n");
return -EINVAL;
}
+
+ init_memory_mapping_oldmem(&vmcore_list);
+
return 0;
}
--
1.7.7.6
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2012-12-10 0:59 ` [PATCH] makedumpfile: request the kernel do page scans HATAYAMA Daisuke
2012-12-10 15:36 ` Cliff Wickman
2012-12-20 3:22 ` HATAYAMA Daisuke
2012-12-20 15:51 ` Cliff Wickman
2012-12-21 1:35 ` HATAYAMA Daisuke
2012-12-10 15:43 ` Cliff Wickman
2012-12-10 15:50 ` Cliff Wickman
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