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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
bounce: call flush_dcache_page() after bounce_copy_vec()
2010-09-09 18:57:25 -07:00
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
readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM
2010-03-06 11:26:25 -08:00
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
kmemcheck: Fix build errors due to missing slab.h
2010-03-30 22:02:32 +09:00
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
exit: fix oops in sync_mm_rss
2010-03-24 16:31:21 -07:00
mmu_notifier.c
thp: mmu_notifier_test_young
2011-01-13 17:32:46 -08:00
mmzone.c
mm: page allocator: adjust the per-cpu counter threshold when memory is low
2011-01-13 17:32:31 -08:00
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
sanitize vfs_fsync calling conventions
2010-05-21 18:31:21 -04:00
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
mm: page_isolation: codeclean fix comment and rm unneeded val init
2010-10-26 16:52:11 -07:00
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: clear memory allocated with the km allocator
2010-10-02 10:28:42 +03:00
percpu-vm.c
mm: remove gfp mask from pcpu_get_vm_areas
2011-01-13 17:32:34 -08:00
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
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
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
tree-wide: fix comment/printk typos
2010-11-01 15:38:34 -04:00
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