From: Andy Whitcroft <apw@shadowen.org>
To: Andrew Morton <akpm@osdl.org>
Cc: Mel Gorman <mel@csn.ul.ie>,
davej@codemonkey.org.uk, tony.luck@intel.com,
linux-kernel@vger.kernel.org, bob.picco@hp.com, ak@suse.de,
linux-mm@kvack.org, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 5/6] Have ia64 use add_active_range() and free_area_init_nodes
Date: Mon, 15 May 2006 09:21:29 +0100 [thread overview]
Message-ID: <44683A09.2060404@shadowen.org> (raw)
In-Reply-To: <20060514203158.216a966e.akpm@osdl.org>
Andrew Morton wrote:
> Mel Gorman <mel@csn.ul.ie> wrote:
>
>>Size zones and holes in an architecture independent manner for ia64.
>>
>
>
> This one makes my ia64 die very early in boot. The trace is pretty useless.
>
> config at http://www.zip.com.au/~akpm/linux/patches/stuff/config-ia64
>
> EFI v1.10 by INTEL: SALsystab=0x3fe4c8c0 ACPI=0x3ff84000 ACPI 2.0=0x3ff83000 MP0
> Early serial console at I/O port 0x2f8 (options '9600n8')
> SAL 3.1: Intel Corp SR870BN4 vers0
> SAL Platform features: BusLock IRQ_Redirection
> SAL: AP wakeup using external interrupt vector 0xf0
> No logical to physical processor mapping available
> iosapic_system_init: Disabling PC-AT compatible 8259 interrupts
> ACPI: Local APIC address c0000000fee00000
> PLATFORM int CPEI (0x3): GSI 22 (level, low) -> CPU 0 (0xc618) vector 30
> register_intr: changing vector 39 from IO-SAPIC-edge to IO-SAPIC-level
> 4 CPUs available, 4 CPUs total
> MCA related initialization done
> node 0 zone DMA missaligned start pfn, enable UNALIGNED_ZONE_BOUNDRIES
> node 0 zone DMA32 missaligned start pfn, enable UNALIGNED_ZONE_BOUNDRIES
> node 0 zone Normal missaligned start pfn, enable UNALIGNED_ZONE_BOUNDRIES
> node 0 zone HighMem missaligned start pfn, enable UNALIGNED_ZONE_BOUNDRIES
> SMP: Allowing 4 CPUs, 0 hotplug CPUs
> Built 1 zonelists
> Kernel command line: BOOT_IMAGE=scsi0:\EFI\redhat\vmlinuz-2.6.17-rc4-mm1 root=/o
> PID hash table entries: 4096 (order: 12, 32768 bytes)
> Console: colour VGA+ 80x25
> Dentry cache hash table entries: 131072 (order: 6, 1048576 bytes)
> Inode-cache hash table entries: 65536 (order: 5, 524288 bytes)
> Placing software IO TLB between 0x4a30000 - 0x8a30000
> Unable to handle kernel NULL pointer dereference (address 0000000000000008)
> swapper[0]: Oops 8813272891392 [1]
> Modules linked in:
>
> Pid: 0, CPU 0, comm: swapper
> psr : 00001010084a6010 ifs : 800000000000060f ip : [<a0000001000e6750>] Notd
> ip is at __free_pages_ok+0x190/0x3c0
> unat: 0000000000000000 pfs : 000000000000060f rsc : 0000000000000003
> rnat: 0000000000ffffff bsps: 00000000000002f9 pr : 80000000afb5956b
> ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70433f
> csd : 0930ffff00090000 ssd : 0930ffff00090000
> b0 : a0000001000e6660 b6 : e00000003fe52940 b7 : a000000100790120
> f6 : 1003e6db6db6db6db6db7 f7 : 1003e000000000006dec0
> f8 : 1003e000000000000fb80 f9 : 1003e000000000006e080
> f10 : 1003e000000000000fb40 f11 : 1003e000000000006dec0
> r1 : a000000100af2db0 r2 : 0000000000000001 r3 : 0000000000000000
> r8 : a0000001008f3d38 r9 : 0000000000004000 r10 : 0000000000370400
> r11 : 0000000000004000 r12 : a0000001007b7e10 r13 : a0000001007b0000
> r14 : 0000000000000001 r15 : 0000000100000001 r16 : 0000000100000001
> r17 : 0000000100000001 r18 : 0000000000001041 r19 : 0000000000000000
> r20 : e00000000149df00 r21 : 0000000100000000 r22 : 0000000055555155
> r23 : 00000000ffffffff r24 : e00000000149df08 r25 : 1555555555555155
> r26 : 0000000000000032 r27 : 0000000000000000 r28 : 0000000000000008
> r29 : 0000000000001041 r30 : 0000000000001041 r31 : 0000000000000001
> Unable to handle kernel NULL pointer dereference (address 0000000000000000)
> swapper[0]: Oops 8813272891392 [2]
> Modules linked in:
>
> Pid: 0, CPU 0, comm: swapper
> psr : 0000101008022018 ifs : 8000000000000287 ip : [<a0000001001236c0>] Notd
> ip is at kmem_cache_alloc+0x40/0x100
> unat: 0000000000000000 pfs : 0000000000000712 rsc : 0000000000000003
> rnat: 0000000000000000 bsps: 0000000000000000 pr : 80000000afb59967
> ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70033f
> csd : 0930ffff00090000 ssd : 0930ffff00090000
> b0 : a00000010003e450 b6 : a000000100001b50 b7 : a00000010003f320
> f6 : 1003e9e3779b97f4a7c16 f7 : 0ffdb8000000000000000
> f8 : 1003e000000000000007f f9 : 1003e0000000000000379
> f10 : 1003e6db6db6db6db6db7 f11 : 1003e000000000000007f
> r1 : a000000100af2db0 r2 : 0000000000000000 r3 : 0000000000000000
> r8 : 0000000000000000 r9 : 0000000000000000 r10 : a0000001007b0f24
> r11 : 0000000000000000 r12 : a0000001007b7280 r13 : a0000001007b0000
> r14 : 0000000000000000 r15 : 0000000000000000 r16 : a0000001007b7310
> r17 : 0000000000000000 r18 : a0000001007b7478 r19 : 0000000000000000
> r20 : 0000000000000000 r21 : 0000000000000018 r22 : 0000000000000000
> r23 : 0000000000000000 r24 : 0000000000000000 r25 : a0000001007b7308
> r26 : 000000007fffffff r27 : a000000100825520 r28 : a0000001008f3c40
> r29 : a000000100816ca8 r30 : 0000000000000018 r31 : 0000000000000018
>
>
>
> (gdb) l *0xa0000001000e6750
> 0xa0000001000e6750 is in __free_pages_ok (mm.h:324).
> 319 extern void FASTCALL(__page_cache_release(struct page *));
> 320
> 321 static inline int page_count(struct page *page)
> 322 {
> 323 if (unlikely(PageCompound(page)))
> 324 page = (struct page *)page_private(page);
> 325 return atomic_read(&page->_count);
> 326 }
> 327
> 328 static inline void get_page(struct page *page)
>
>
> Note the misaligned pfns.
>
> Andy's (misspelled) CONFIG_UNALIGNED_ZONE_BOUNDRIES patch didn't actually
> include an update to any Kconfig files. But hacking that in by hand didn't
> help.
Interesting. You are correct there was no config component, at the time
I didn't have direct evidence that any architecture needed it, only that
we had an unchecked requirement on zones, a requirement that had only
recently arrived with the changes to free buddy detection. I note that
MAX_ORDER is 17 for ia64 so that probabally accounts for the
missalignment. It is clear that the reporting is slightly over-zelous
as I am reporting zero-sized zones. I'll get that fixed and patch to
you. I'll also have a look at the patch as added to -mm and try and get
the rest of the spelling sorted :-/.
I'll go see if we currently have a machine to test this config on.
-apw
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next prev parent reply other threads:[~2006-05-15 8:21 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-08 14:10 [PATCH 0/6] Sizing zones and holes in an architecture independent manner V6 Mel Gorman
2006-05-08 14:10 ` [PATCH 1/6] Introduce mechanism for registering active regions of memory Mel Gorman
2006-05-08 14:11 ` [PATCH 2/6] Have Power use add_active_range() and free_area_init_nodes() Mel Gorman
2006-05-08 14:11 ` [PATCH 3/6] Have x86 use add_active_range() and free_area_init_nodes Mel Gorman
2006-05-08 14:11 ` [PATCH 4/6] Have x86_64 " Mel Gorman
2006-05-20 20:59 ` Andrew Morton
2006-05-20 21:27 ` Andi Kleen
2006-05-20 21:40 ` Andrew Morton
2006-05-20 22:17 ` Andi Kleen
2006-05-20 22:54 ` Andrew Morton
2006-05-21 16:20 ` Mel Gorman
2006-05-21 15:50 ` Mel Gorman
2006-05-21 19:08 ` Andrew Morton
2006-05-21 22:23 ` Mel Gorman
2006-05-23 18:01 ` Mel Gorman
2006-05-08 14:12 ` [PATCH 5/6] Have ia64 " Mel Gorman
2006-05-15 3:31 ` Andrew Morton
2006-05-15 8:21 ` Andy Whitcroft [this message]
2006-05-15 10:00 ` Nick Piggin
2006-05-15 10:19 ` Andy Whitcroft
2006-05-15 10:29 ` KAMEZAWA Hiroyuki
2006-05-15 10:47 ` KAMEZAWA Hiroyuki
2006-05-15 11:02 ` Andy Whitcroft
2006-05-16 0:31 ` Nick Piggin
2006-05-16 1:34 ` KAMEZAWA Hiroyuki
2006-05-16 2:11 ` Nick Piggin
2006-05-15 12:27 ` Mel Gorman
2006-05-15 22:44 ` Mel Gorman
2006-05-19 14:03 ` Mel Gorman
2006-05-19 14:23 ` Andy Whitcroft
2006-05-08 14:12 ` [PATCH 6/6] Break out memory initialisation code from page_alloc.c to mem_init.c Mel Gorman
2006-05-09 1:47 ` Nick Piggin
2006-05-09 8:24 ` Mel Gorman
-- strict thread matches above, loose matches on Subject: below --
2006-07-08 11:10 [PATCH 0/6] Sizing zones and holes in an architecture independent manner V8 Mel Gorman
2006-07-08 11:12 ` [PATCH 5/6] Have ia64 use add_active_range() and free_area_init_nodes Mel Gorman
2006-08-21 13:45 [PATCH 0/6] Sizing zones and holes in an architecture independent manner V9 Mel Gorman
2006-08-21 13:46 ` [PATCH 5/6] Have ia64 use add_active_range() and free_area_init_nodes Mel Gorman
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