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| author |   Johannes Weiner <hannes@cmpxchg.org> | 2009-09-21 17:01:48 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:30 -0700 |
| commit | 451ea25da71590361c71bf3044c55b870a887d53 (patch) | |
| tree | e2e9de6e7c1fb4f79c0413a3c4d401ec9263b722 /include/linux/mmu_notifier.h | |
| parent | vmalloc.c: fix double error checking (diff) | |
| download | linux-dev-451ea25da71590361c71bf3044c55b870a887d53.tar.xz linux-dev-451ea25da71590361c71bf3044c55b870a887d53.zip | |
mm: perform non-atomic test-clear of PG_mlocked on free
By the time PG_mlocked is cleared in the page freeing path, nobody else is
looking at our page->flags anymore.
It is thus safe to make the test-and-clear non-atomic and thereby removing
an unnecessary and expensive operation from a hotpath.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mmu_notifier.h')
0 files changed, 0 insertions, 0 deletions