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| author |   Johannes Weiner <hannes@cmpxchg.org> | 2012-07-31 16:45:50 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 18:42:49 -0700 |
| commit | bdf4f4d2161a795b9323855a81a047bd68f16202 (patch) | |
| tree | 3aa457660c69f2945cb9ab477079e7441f220b27 /mm/mmu_notifier.c | |
| parent | mm: memcg: only check swap cache pages for repeated charging (diff) | |
| download | linux-dev-bdf4f4d2161a795b9323855a81a047bd68f16202.tar.xz linux-dev-bdf4f4d2161a795b9323855a81a047bd68f16202.zip | |
mm: memcg: only check anon swapin page charges for swap cache
shmem knows for sure that the page is in swap cache when attempting to
charge a page, because the cache charge entry function has a check for it.
Only anon pages may be removed from swap cache already when trying to
charge their swapin.
Adjust the comment, though: '4969c11 mm: fix swapin race condition' added
a stable PageSwapCache check under the page lock in the do_swap_page()
before calling the memory controller, so it's unuse_pte()'s pte_same()
that may fail.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Wanpeng Li <liwp.linux@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mmu_notifier.c')
0 files changed, 0 insertions, 0 deletions