* [RFC PATCH v1 00/33] accurately calculate pages managed by buddy system
@ 2013-03-05 14:54 Jiang Liu
0 siblings, 0 replies; 2+ messages in thread
From: Jiang Liu @ 2013-03-05 14:54 UTC (permalink / raw)
To: Andrew Morton, David Rientjes
Cc: Jiang Liu, Wen Congyang, Maciej Rutecki, Chris Clayton,
Rafael J . Wysocki, Mel Gorman, Minchan Kim, KAMEZAWA Hiroyuki,
Michal Hocko, Jianguo Wu, Anatolij Gustschin, Aurelien Jacquiot,
Benjamin Herrenschmidt, Catalin Marinas, Chen Liqin,
Chris Metcalf, Chris Zankel, David Howells, David S. Miller,
Eric Biederman, Fenghua Yu, Geert Uytterhoeven, Guan Xuetao,
Haavard Skinnemoen, Hans-Christian Egtvedt, Heiko Carstens,
Helge Deller, Hirokazu Takata, H. Peter Anvin, Ingo Molnar,
Ivan Kokshaysky, James E.J. Bottomley, Jeff Dike,
Jeremy Fitzhardinge, Jonas Bonn, Koichi Yasutake,
Konrad Rzeszutek Wilk, Lennox Wu, Mark Salter, Martin Schwidefsky,
Matt Turner, Max Filippov, Michael S. Tsirkin, Michal Simek,
Michel Lespinasse, Mikael Starvik, Mike Frysinger, Paul Mackerras,
Paul Mundt, Ralf Baechle, Richard Henderson, Rik van Riel,
Russell King, Rusty Russell, Sam Ravnborg, Tang Chen,
Thomas Gleixner, Tony Luck, Will Deacon, Yasuaki Ishimatsu,
Yinghai Lu, Yoshinori Sato, x86, xen-devel, linux-kernel,
linux-mm, linux-arm-kernel, virtualization
The original goal of this patchset is to fix the bug reported by
https://bugzilla.kernel.org/show_bug.cgi?id=53501
Now it has also been expanded to reduce common code used by memory
initializion. In total it has reduced about 550 lines of code.
Patch 1:
Extract common help functions from free_init_mem() and
free_initrd_mem() on different architectures.
Patch 2-27:
Use help functions to simplify free_init_mem() and
free_initrd_mem() on different architectures. This has reduced
about 500 lines of code.
Patch 28:
Introduce common help function to free highmem pages when
initializing memory subsystem.
Patch 29-32:
Adjust totalhigh_pages, totalram_pages and zone->managed_pages
altogether when reserving/unreserving pages.
Patch 33:
Change /sys/.../node/nodex/meminfo to report available pages
within the node as "MemTotal".
We have only tested these patchset on x86 platforms, and have done basic
compliation tests using cross-compilers from ftp.kernel.org. That means
some code may not pass compilation on some architectures. So any help
to test this patchset are welcomed!
Jiang Liu (33):
mm: introduce common help functions to deal with reserved/managed
pages
mm/alpha: use common help functions to free reserved pages
mm/ARM: use common help functions to free reserved pages
mm/avr32: use common help functions to free reserved pages
mm/blackfin: use common help functions to free reserved pages
mm/c6x: use common help functions to free reserved pages
mm/cris: use common help functions to free reserved pages
mm/FRV: use common help functions to free reserved pages
mm/h8300: use common help functions to free reserved pages
mm/IA64: use common help functions to free reserved pages
mm/m32r: use common help functions to free reserved pages
mm/m68k: use common help functions to free reserved pages
mm/microblaze: use common help functions to free reserved pages
mm/MIPS: use common help functions to free reserved pages
mm/mn10300: use common help functions to free reserved pages
mm/openrisc: use common help functions to free reserved pages
mm/parisc: use common help functions to free reserved pages
mm/ppc: use common help functions to free reserved pages
mm/s390: use common help functions to free reserved pages
mm/score: use common help functions to free reserved pages
mm/SH: use common help functions to free reserved pages
mm/SPARC: use common help functions to free reserved pages
mm/um: use common help functions to free reserved pages
mm/unicore32: use common help functions to free reserved pages
mm/x86: use common help functions to free reserved pages
mm/xtensa: use common help functions to free reserved pages
mm,kexec: use common help functions to free reserved pages
mm: introduce free_highmem_page() helper to free highmem pages inti
buddy system
mm: accurately calculate zone->managed_pages for highmem zones
mm: use a dedicated lock to protect totalram_pages and
zone->managed_pages
mm: avoid using __free_pages_bootmem() at runtime
mm: correctly update zone->mamaged_pages
mm: report available pages as "MemTotal" for each NUMA node
arch/alpha/kernel/sys_nautilus.c | 5 +-
arch/alpha/mm/init.c | 24 ++-------
arch/alpha/mm/numa.c | 3 +-
arch/arm/mm/init.c | 46 ++++++-----------
arch/arm64/mm/init.c | 26 +---------
arch/avr32/mm/init.c | 24 +--------
arch/blackfin/mm/init.c | 20 +-------
arch/c6x/mm/init.c | 30 +----------
arch/cris/mm/init.c | 16 +-----
arch/frv/mm/init.c | 32 ++----------
arch/h8300/mm/init.c | 28 +----------
arch/ia64/mm/init.c | 23 ++-------
arch/m32r/mm/init.c | 26 ++--------
arch/m68k/mm/init.c | 24 +--------
arch/microblaze/include/asm/setup.h | 1 -
arch/microblaze/mm/init.c | 33 ++----------
arch/mips/mm/init.c | 36 ++++----------
arch/mips/sgi-ip27/ip27-memory.c | 4 +-
arch/mn10300/mm/init.c | 23 +--------
arch/openrisc/mm/init.c | 27 ++--------
arch/parisc/mm/init.c | 24 ++-------
arch/powerpc/kernel/crash_dump.c | 5 +-
arch/powerpc/kernel/fadump.c | 5 +-
arch/powerpc/kernel/kvm.c | 7 +--
arch/powerpc/mm/mem.c | 34 ++-----------
arch/powerpc/platforms/512x/mpc512x_shared.c | 5 +-
arch/s390/mm/init.c | 35 +++----------
arch/score/mm/init.c | 33 ++----------
arch/sh/mm/init.c | 26 ++--------
arch/sparc/kernel/leon_smp.c | 15 ++----
arch/sparc/mm/init_32.c | 50 +++----------------
arch/sparc/mm/init_64.c | 25 ++--------
arch/tile/mm/init.c | 4 +-
arch/um/kernel/mem.c | 25 ++--------
arch/unicore32/mm/init.c | 26 +---------
arch/x86/mm/init.c | 5 +-
arch/x86/mm/init_32.c | 10 +---
arch/x86/mm/init_64.c | 18 +------
arch/xtensa/mm/init.c | 21 ++------
drivers/virtio/virtio_balloon.c | 8 +--
drivers/xen/balloon.c | 19 ++-----
include/linux/mm.h | 36 ++++++++++++++
include/linux/mmzone.h | 14 ++++--
kernel/kexec.c | 8 +--
mm/bootmem.c | 16 ++----
mm/hugetlb.c | 2 +-
mm/memory_hotplug.c | 31 ++----------
mm/nobootmem.c | 14 ++----
mm/page_alloc.c | 69 ++++++++++++++++++++++----
49 files changed, 248 insertions(+), 793 deletions(-)
--
1.7.9.5
--
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [RFC PATCH v1 00/33] accurately calculate pages managed by buddy system
[not found] <51376444.9030601@gmail.com>
@ 2013-03-07 6:25 ` Vineet Gupta
0 siblings, 0 replies; 2+ messages in thread
From: Vineet Gupta @ 2013-03-07 6:25 UTC (permalink / raw)
To: Jiang Liu
Cc: James Hogan, linux-arch@vger.kernel.org, linux-mm, Andrew Morton
[-- Attachment #1.1: Type: text/plain, Size: 5296 bytes --]
Somehow the CC to linux-arch and linux-mm got lost in the trail - Also adding
James for metag and clipped the extended CC list.
Acked-by: Vineet Gupta <vgupta@synopsys.com> for patch 01 (ARC bits)
-------- Original Message --------
Subject: Re: [RFC PATCH v1 00/33] accurately calculate pages managed by buddy system
Date: Wed, 6 Mar 2013 23:44:04 +0800
From: Jiang Liu <liuj97@gmail.com>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
CC: Andrew Morton <akpm@linux-foundation.org>, David Rientjes
<rientjes@google.com>, Jiang Liu <jiang.liu@huawei.com>, Wen Congyang
<wency@cn.fujitsu.com>, Maciej Rutecki <maciej.rutecki@gmail.com>, "Chris Clayton"
<chris2553@googlemail.com>, "Rafael J . Wysocki" <rjw@sisk.pl>, "Mel Gorman"
<mgorman@suse.de>, Minchan Kim <minchan@kernel.org>, "KAMEZAWA Hiroyuki"
<kamezawa.hiroyu@jp.fujitsu.com>, Michal Hocko <mhocko@suse.cz>, Jianguo Wu
<wujianguo@huawei.com>, Anatolij Gustschin <agust@denx.de>, Aurelien Jacquiot
<a-jacquiot@ti.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Catalin
Marinas <catalin.marinas@arm.com>, "Chen Liqin" <liqin.chen@sunplusct.com>, Chris
Metcalf <cmetcalf@tilera.com>, Chris Zankel <chris@zankel.net>, David Howells
<dhowells@redhat.com>, "David S. Miller" <davem@davemloft.net>, Eric Biederman
<ebiederm@xmission.com>, Fenghua Yu <fenghua.yu@intel.com>, "Geert Uytterhoeven"
<geert@linux-m68k.org>
On 03/06/2013 01:21 PM, Vineet Gupta wrote:
> Hi Jiang,
>
> On Tuesday 05 March 2013 08:24 PM, Jiang Liu wrote:
>> The original goal of this patchset is to fix the bug reported by
>> https://bugzilla.kernel.org/show_bug.cgi?id=53501
>>
>> Now it has also been expanded to reduce common code used by memory
>> initializion. In total it has reduced about 550 lines of code.
>>
>> Patch 1:
>> Extract common help functions from free_init_mem() and
>> free_initrd_mem() on different architectures.
>> Patch 2-27:
>> Use help functions to simplify free_init_mem() and
>> free_initrd_mem() on different architectures. This has reduced
>> about 500 lines of code.
>> Patch 28:
>> Introduce common help function to free highmem pages when
>> initializing memory subsystem.
>> Patch 29-32:
>> Adjust totalhigh_pages, totalram_pages and zone->managed_pages
>> altogether when reserving/unreserving pages.
>> Patch 33:
>> Change /sys/.../node/nodex/meminfo to report available pages
>> within the node as "MemTotal".
>>
>> We have only tested these patchset on x86 platforms, and have done basic
>> compliation tests using cross-compilers from ftp.kernel.org. That means
>> some code may not pass compilation on some architectures. So any help
>> to test this patchset are welcomed!
>>
>> Jiang Liu (33):
>> mm: introduce common help functions to deal with reserved/managed
>> pages
>> mm/alpha: use common help functions to free reserved pages
>> mm/ARM: use common help functions to free reserved pages
>> mm/avr32: use common help functions to free reserved pages
>> mm/blackfin: use common help functions to free reserved pages
>> mm/c6x: use common help functions to free reserved pages
>> mm/cris: use common help functions to free reserved pages
>> mm/FRV: use common help functions to free reserved pages
>> mm/h8300: use common help functions to free reserved pages
>> mm/IA64: use common help functions to free reserved pages
>> mm/m32r: use common help functions to free reserved pages
>> mm/m68k: use common help functions to free reserved pages
>> mm/microblaze: use common help functions to free reserved pages
>> mm/MIPS: use common help functions to free reserved pages
>> mm/mn10300: use common help functions to free reserved pages
>> mm/openrisc: use common help functions to free reserved pages
>> mm/parisc: use common help functions to free reserved pages
>> mm/ppc: use common help functions to free reserved pages
>> mm/s390: use common help functions to free reserved pages
>> mm/score: use common help functions to free reserved pages
>> mm/SH: use common help functions to free reserved pages
>> mm/SPARC: use common help functions to free reserved pages
>> mm/um: use common help functions to free reserved pages
>> mm/unicore32: use common help functions to free reserved pages
>> mm/x86: use common help functions to free reserved pages
>> mm/xtensa: use common help functions to free reserved pages
>> mm,kexec: use common help functions to free reserved pages
>> mm: introduce free_highmem_page() helper to free highmem pages inti
>> buddy system
>> mm: accurately calculate zone->managed_pages for highmem zones
>> mm: use a dedicated lock to protect totalram_pages and
>> zone->managed_pages
>> mm: avoid using __free_pages_bootmem() at runtime
>> mm: correctly update zone->mamaged_pages
>> mm: report available pages as "MemTotal" for each NUMA node
>
> I'm not sure what baseline your patches are based off of - however as part of
> 3.9-rc1, two new architectures were merged (arc and metag). It would be ideal if
> they got updated them as part of this series itself - if possible. Please let me know.
>
> Thx,
> -Vineet
Hi Vineet,
I have rebased the patchset to v3.9-rc1, but haven't noticed these two
new architectures. So how about the attached three patches?
Regards!
Gerry
[-- Attachment #1.2: Type: text/html, Size: 9403 bytes --]
[-- Attachment #2: 0001-mm-arc-use-common-help-functions-to-free-reserved-pa.patch --]
[-- Type: text/x-patch, Size: 1164 bytes --]
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index caf797d..727d479 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -144,37 +144,18 @@ void __init mem_init(void)
PAGES_TO_KB(reserved_pages));
}
-static void __init free_init_pages(const char *what, unsigned long begin,
- unsigned long end)
-{
- unsigned long addr;
-
- pr_info("Freeing %s: %ldk [%lx] to [%lx]\n",
- what, TO_KB(end - begin), begin, end);
-
- /* need to check that the page we free is not a partial page */
- for (addr = begin; addr + PAGE_SIZE <= end; addr += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(addr));
- init_page_count(virt_to_page(addr));
- free_page(addr);
- totalram_pages++;
- }
-}
-
/*
* free_initmem: Free all the __init memory.
*/
void __init_refok free_initmem(void)
{
- free_init_pages("unused kernel memory",
- (unsigned long)__init_begin,
- (unsigned long)__init_end);
+ free_initmem_default(0);
}
#ifdef CONFIG_BLK_DEV_INITRD
void __init free_initrd_mem(unsigned long start, unsigned long end)
{
- free_init_pages("initrd memory", start, end);
+ free_reserved_area(start, end, 0, "initrd");
}
#endif
--
1.7.9.5
[-- Attachment #3: 0002-mm-metag-use-common-help-functions-to-free-reserved-.patch --]
[-- Type: text/x-patch, Size: 1073 bytes --]
diff --git a/arch/metag/mm/init.c b/arch/metag/mm/init.c
index 504a398..c6784fb 100644
--- a/arch/metag/mm/init.c
+++ b/arch/metag/mm/init.c
@@ -412,32 +412,15 @@ void __init mem_init(void)
return;
}
-static void free_init_pages(char *what, unsigned long begin, unsigned long end)
-{
- unsigned long addr;
-
- for (addr = begin; addr < end; addr += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(addr));
- init_page_count(virt_to_page(addr));
- memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
- free_page(addr);
- totalram_pages++;
- }
- pr_info("Freeing %s: %luk freed\n", what, (end - begin) >> 10);
-}
-
void free_initmem(void)
{
- free_init_pages("unused kernel memory",
- (unsigned long)(&__init_begin),
- (unsigned long)(&__init_end));
+ free_initmem_default(POISON_FREE_INITMEM);
}
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
- end = end & PAGE_MASK;
- free_init_pages("initrd memory", start, end);
+ free_reserved_area(start, end, POISON_FREE_INITMEM, "initrd");
}
#endif
--
1.7.9.5
[-- Attachment #4: 0003-free-highmem-metag.patch --]
[-- Type: text/x-patch, Size: 6208 bytes --]
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 40a5bc2..400a383 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -519,10 +519,8 @@ static void __init free_unused_memmap(struct meminfo *mi)
#ifdef CONFIG_HIGHMEM
static inline void free_area_high(unsigned long pfn, unsigned long end)
{
- for (; pfn < end; pfn++) {
- __free_reserved_page(pfn_to_page(pfn));
- totalhigh_pages++;
- }
+ for (; pfn < end; pfn++)
+ free_highmem_page(pfn_to_page(pfn));
}
#endif
diff --git a/arch/metag/mm/init.c b/arch/metag/mm/init.c
index c6784fb..7449af0 100644
--- a/arch/metag/mm/init.c
+++ b/arch/metag/mm/init.c
@@ -380,13 +380,8 @@ void __init mem_init(void)
#ifdef CONFIG_HIGHMEM
unsigned long tmp;
- for (tmp = highstart_pfn; tmp < highend_pfn; tmp++) {
- struct page *page = pfn_to_page(tmp);
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
- }
+ for (tmp = highstart_pfn; tmp < highend_pfn; tmp++)
+ free_highmem_page(pfn_to_page(tmp));
totalram_pages += totalhigh_pages;
num_physpages += totalhigh_pages;
#endif /* CONFIG_HIGHMEM */
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 9be5302..d0fe2a8 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -82,10 +82,7 @@ static unsigned long highmem_setup(void)
/* FIXME not sure about */
if (memblock_is_reserved(pfn << PAGE_SHIFT))
continue;
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
+ free_highmem_page(page);
reservedpages++;
}
totalram_pages += totalhigh_pages;
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 60f7c61..3105494 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -393,10 +393,7 @@ void __init mem_init(void)
SetPageReserved(page);
continue;
}
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
+ free_highmem_page(page);
}
totalram_pages += totalhigh_pages;
num_physpages += totalhigh_pages;
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index c756713..79eb16b 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -352,10 +352,7 @@ void __init mem_init(void)
struct page *page = pfn_to_page(pfn);
if (memblock_is_reserved(paddr))
continue;
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
+ free_higmem_page(page);
reservedpages--;
}
totalram_pages += totalhigh_pages;
diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
index 2a7b6eb..cd4c78c 100644
--- a/arch/sparc/mm/init_32.c
+++ b/arch/sparc/mm/init_32.c
@@ -282,14 +282,8 @@ static void map_high_region(unsigned long start_pfn, unsigned long end_pfn)
printk("mapping high region %08lx - %08lx\n", start_pfn, end_pfn);
#endif
- for (tmp = start_pfn; tmp < end_pfn; tmp++) {
- struct page *page = pfn_to_page(tmp);
-
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
- }
+ for (tmp = start_pfn; tmp < end_pfn; tmp++)
+ free_higmem_page(pfn_to_page(tmp));
}
void __init mem_init(void)
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index d5ac802..fea5c9d 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -42,17 +42,12 @@ static unsigned long brk_end;
static void setup_highmem(unsigned long highmem_start,
unsigned long highmem_len)
{
- struct page *page;
unsigned long highmem_pfn;
int i;
highmem_pfn = __pa(highmem_start) >> PAGE_SHIFT;
- for (i = 0; i < highmem_len >> PAGE_SHIFT; i++) {
- page = &mem_map[highmem_pfn + i];
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- }
+ for (i = 0; i < highmem_len >> PAGE_SHIFT; i++)
+ free_highmem_page(&mem_map[highmem_pfn + i]);
}
#endif
@@ -73,7 +68,7 @@ void __init mem_init(void)
totalram_pages = free_all_bootmem();
max_low_pfn = totalram_pages;
#ifdef CONFIG_HIGHMEM
- totalhigh_pages = highmem >> PAGE_SHIFT;
+ setup_highmem(end_iomem, highmem);
totalram_pages += totalhigh_pages;
#endif
num_physpages = totalram_pages;
@@ -81,10 +76,6 @@ void __init mem_init(void)
printk(KERN_INFO "Memory: %luk available\n",
nr_free_pages() << (PAGE_SHIFT-10));
kmalloc_ok = 1;
-
-#ifdef CONFIG_HIGHMEM
- setup_highmem(end_iomem, highmem);
-#endif
}
/*
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 2d19001..3ac7e31 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -427,14 +427,6 @@ static void __init permanent_kmaps_init(pgd_t *pgd_base)
pkmap_page_table = pte;
}
-static void __init add_one_highpage_init(struct page *page)
-{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
-}
-
void __init add_highpages_with_active_regions(int nid,
unsigned long start_pfn, unsigned long end_pfn)
{
@@ -448,7 +440,7 @@ void __init add_highpages_with_active_regions(int nid,
start_pfn, end_pfn);
for ( ; pfn < e_pfn; pfn++)
if (pfn_valid(pfn))
- add_one_highpage_init(pfn_to_page(pfn));
+ free_highmem_page(pfn_to_page(pfn));
}
}
#else
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 881461c..4d1509b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1296,6 +1296,9 @@ extern void free_area_init_node(int nid, unsigned long * zones_size,
extern void free_initmem(void);
/* Help functions to deal with reserved/managed pages. */
+#ifdef CONFIG_HIGHMEM
+extern void free_highmem_page(struct page *page);
+#endif
extern unsigned long free_reserved_area(unsigned long start, unsigned long end,
int poison, char *s);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0fadb09..ad2f619 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5133,6 +5133,14 @@ unsigned long free_reserved_area(unsigned long start, unsigned long end,
return pages;
}
+#ifdef CONFIG_HIGHMEM
+void free_highmem_page(struct page *page)
+{
+ __free_reserved_page(page);
+ totalhigh_pages++;
+}
+#endif
+
/**
* set_dma_reserve - set the specified number of pages reserved in the first zone
* @new_dma_reserve: The number of pages to mark reserved
^ permalink raw reply related [flat|nested] 2+ messages in thread
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2013-03-07 6:25 ` [RFC PATCH v1 00/33] accurately calculate pages managed by buddy system Vineet Gupta
2013-03-05 14:54 Jiang Liu
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