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| author | Dimitri Sivanich <sivanich@sgi.com> | 2011-10-31 17:09:46 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-01 12:26:54 -0700 |
| commit | 9116bc4fb2f96d4a3190932bf17088174da04401 (patch) | |
| tree | 7223f2374e39700a9ae6ddde4bdd645dc8b3daf0 /drivers/base | |
| parent | fbb41f55c42a4f4e708c9e9af926dc6227a5b52d (diff) | |
| download | kernel_samsung_smdk4412-9116bc4fb2f96d4a3190932bf17088174da04401.zip kernel_samsung_smdk4412-9116bc4fb2f96d4a3190932bf17088174da04401.tar.gz kernel_samsung_smdk4412-9116bc4fb2f96d4a3190932bf17088174da04401.tar.bz2 | |
mm/vmstat.c: cache align vm_stat
commit a1cb2c60ddc98ff4e5246f410558805401ceee67 upstream.
Stable note: Not tracked on Bugzilla. This patch is known to make a big
difference to tmpfs performance on larger machines.
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>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Diffstat (limited to 'drivers/base')
0 files changed, 0 insertions, 0 deletions