Dimitri Sivanich a1cb2c60dd mm/vmstat.c: cache align vm_stat ...

Avoid false sharing of the vm_stat array.

This was found to adversely affect tmpfs I/O performance.

Tests run on a 640 cpu UV system.

With 120 threads doing parallel writes, each to different tmpfs mounts:
No patch:		~300 MB/sec
With vm_stat alignment:	~430 MB/sec

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Acked-by: Christoph Lameter <cl@gentwo.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2011-10-31 17:30:51 -07:00

..

backing-dev.c

mm-add-comment-explaining-task-state-setting-in-bdi_forker_thread-fix

2011-10-31 17:30:49 -07:00

bootmem.c

crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn

2011-03-23 19:47:19 -07:00

bounce.c

…

cleancache.c

mm: cleancache core ops functions and config

2011-05-26 10:01:36 -06:00

compaction.c

mm: compaction: make compact_zone_order() static

2011-10-31 17:30:49 -07:00

debug-pagealloc.c

debug-pagealloc: add support for highmem pages

2011-10-31 17:30:48 -07:00

dmapool.c

devres: fix possible use after free

2011-07-25 20:57:14 -07:00

fadvise.c

…

failslab.c

fault-injection: add ability to export fault_attr in arbitrary directory

2011-08-03 14:25:20 -10:00

filemap_xip.c

mm: Convert i_mmap_lock to a mutex

2011-05-25 08:39:18 -07:00

filemap.c

vfs: iov_iter: have iov_iter_advance decrement nr_segs appropriately

2011-10-28 13:55:08 +02:00

fremap.c

mm: don't access vm_flags as 'int'

2011-05-26 09:20:31 -07:00

highmem.c

mm: fix kunmap_high() comment

2011-10-31 17:30:49 -07:00

huge_memory.c

mm/huge_memory: fix typo when updating mmu cache

2011-10-31 17:30:51 -07:00

hugetlb.c

mm: hugetlb: fix coding style issues

2011-07-25 20:57:09 -07:00

hwpoison-inject.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

init-mm.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

internal.h

mm: nommu: sort mm->mmap list properly

2011-05-25 08:39:05 -07:00

Kconfig

memblock: add NO_BOOTMEM config symbol

2011-10-31 17:30:47 -07:00

Kconfig.debug

mm: debug-pagealloc: fix kconfig dependency warning

2011-03-22 17:44:02 -07:00

kmemcheck.c

…

kmemleak-test.c

kmemleak: remove memset by using kzalloc

2011-01-27 18:31:51 +00:00

kmemleak.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

ksm.c

oom: fix race while temporarily setting current's oom_score_adj

2011-10-31 17:30:45 -07:00

maccess.c

maccess,probe_kernel: Make write/read src const void *

2011-05-25 19:56:23 -04:00

madvise.c

fs: kill i_alloc_sem

2011-07-20 20:47:46 -04:00

Makefile

Cross Memory Attach

2011-10-31 17:30:44 -07:00

memblock.c

mm/memblock.c: quiet sparse noise

2011-10-31 17:30:50 -07:00

memcontrol.c

mm: change isolate mode from #define to bitwise type

2011-10-31 17:30:44 -07:00

memory_hotplug.c

mm: extend memory hotplug API to allow memory hotplug in virtual machines

2011-07-25 20:57:08 -07:00

memory-failure.c

HWPOISON: convert pr_debug()s to pr_info()s

2011-10-31 17:30:49 -07:00

memory.c

mm/futex: fix futex writes on archs with SW tracking of dirty & young

2011-07-25 20:57:11 -07:00

mempolicy.c

mm/mempolicy.c: quiet sparse noise

2011-10-31 17:30:50 -07:00

mempool.c

…

migrate.c

mm: migration: clean up unmap_and_move()

2011-10-31 17:30:45 -07:00

mincore.c

mm: clarify the radix_tree exceptional cases

2011-08-03 14:25:24 -10:00

mlock.c

mm: munlock use mapcount to avoid terrible overhead

2011-10-31 17:30:51 -07:00

mm_init.c

…

mmap.c

mm/mmap.c: eliminate the ret variable from mm_take_all_locks()

2011-10-31 17:30:49 -07:00

mmu_context.c

…

mmu_notifier.c

thp: mmu_notifier_test_young

2011-01-13 17:32:46 -08:00

mmzone.c

…

mprotect.c

thp: mprotect: transparent huge page support

2011-01-13 17:32:44 -08:00

mremap.c

thp: mremap support and TLB optimization

2011-10-31 17:30:48 -07:00

msync.c

…

nobootmem.c

memblock/nobootmem: remove unneeded code from alloc_bootmem_node_high()

2011-05-25 08:39:31 -07:00

nommu.c

mmap: fix and tidy up overcommit page arithmetic

2011-07-25 20:57:09 -07:00

oom_kill.c

oom: fix race while temporarily setting current's oom_score_adj

2011-10-31 17:30:45 -07:00

page_alloc.c

mm: neaten warn_alloc_failed

2011-10-31 17:30:48 -07:00

page_cgroup.c

mm: Convert vmalloc/memset to vzalloc

2011-09-15 13:56:56 +02:00

page_io.c

block: kill off REQ_UNPLUG

2011-03-10 08:52:27 +01:00

page_isolation.c

…

page-writeback.c

mm/page-writeback.c: document bdi_min_ratio

2011-10-31 17:30:45 -07:00

pagewalk.c

pagewalk: fix code comment for THP

2011-07-25 20:57:09 -07:00

percpu-km.c

…

percpu-vm.c

…

percpu.c

Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

2011-05-24 11:53:42 -07:00

pgtable-generic.c

mm/pgtable-generic.c: fix CONFIG_SWAP=n build

2011-01-26 10:49:58 +10:00

prio_tree.c

sanitize <linux/prefetch.h> usage

2011-05-20 12:50:29 -07:00

process_vm_access.c

Cross Memory Attach

2011-10-31 17:30:44 -07:00

quicklist.c

…

readahead.c

readahead: readahead page allocations are OK to fail

2011-05-25 08:39:25 -07:00

rmap.c

ksm: fix the comment of try_to_unmap_one()

2011-10-31 17:30:49 -07:00

shmem.c

vmscan: add barrier to prevent evictable page in unevictable list

2011-10-31 17:30:50 -07:00

slab.c

mm: restrict access to slab files under procfs and sysfs

2011-09-27 22:59:27 +03:00

slob.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

slub.c

lib/string.c: introduce memchr_inv()

2011-10-31 17:30:47 -07:00

sparse-vmemmap.c

…

sparse.c

mm: make some struct page's const

2011-07-25 20:57:07 -07:00

swap_state.c

block: remove per-queue plugging

2011-03-10 08:52:07 +01:00

swap.c

mm: batch activate_page() to reduce lock contention

2011-05-25 08:39:37 -07:00

swapfile.c

oom: fix race while temporarily setting current's oom_score_adj

2011-10-31 17:30:45 -07:00

thrash.c

mm/thrash.c: quiet sparse noise

2011-10-31 17:30:50 -07:00

truncate.c

mm: a few small updates for radix-swap

2011-08-03 14:25:24 -10:00

util.c

mm: nommu: sort mm->mmap list properly

2011-05-25 08:39:05 -07:00

vmalloc.c

mm/vmalloc.c: report more vmalloc failures

2011-10-31 17:30:48 -07:00

vmscan.c

vmscan: abort reclaim/compaction if compaction can proceed

2011-10-31 17:30:50 -07:00

vmstat.c

mm/vmstat.c: cache align vm_stat

2011-10-31 17:30:51 -07:00