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| author | Mel Gorman <mgorman@suse.de> | 2012-09-17 14:09:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-09-17 15:00:38 -0700 |
| commit | 30c29bea6af2d3b6ffc8865864de7fc08cadb5df (patch) | |
| tree | b01c1ad1f07cfe5d2a7b0b6b2704358c70994899 /Documentation/cdrom | |
| parent | fded4e090c60100d709318896c79816d68d5b47d (diff) | |
| download | linux-30c29bea6af2d3b6ffc8865864de7fc08cadb5df.tar.bz2 | |
slab: do ClearSlabPfmemalloc() for all pages of slab
Right now, we call ClearSlabPfmemalloc() for first page of slab when we
clear SlabPfmemalloc flag. This is fine for most swap-over-network use
cases as it is expected that order-0 pages are in use. Unfortunately it
is possible that that __ac_put_obj() checks SlabPfmemalloc on a tail
page and while this is harmless, it is sloppy. This patch ensures that
the head page is always used.
This problem was originally identified by Joonsoo Kim.
[js1304@gmail.com: Original implementation and problem identification]
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: David Miller <davem@davemloft.net>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/cdrom')
0 files changed, 0 insertions, 0 deletions