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| author | Johannes Weiner <hannes@cmpxchg.org> | 2013-11-01 00:34:13 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-01 00:58:13 +0100 |
| commit | 3168ecbe1c04ec3feb7cb42388a17d7f047fe1a2 (patch) | |
| tree | b8e0a03d787c2219b1d1fd833193de7abc59442e /mm/page-writeback.c | |
| parent | Merge branch 'akpm' (fixes from Andrew Morton) (diff) | |
| download | linux-3168ecbe1c04ec3feb7cb42388a17d7f047fe1a2.tar.xz linux-3168ecbe1c04ec3feb7cb42388a17d7f047fe1a2.zip | |
mm: memcg: use proper memcg in limit bypass
Commit 84235de394d9 ("fs: buffer: move allocation failure loop into the
allocator") allowed __GFP_NOFAIL allocations to bypass the limit if they
fail to reclaim enough memory for the charge. But because the main test
case was on a 3.2-based system, the patch missed the fact that on newer
kernels the charge function needs to return root_mem_cgroup when
bypassing the limit, and not NULL. This will corrupt whatever memory is
at NULL + percpu pointer offset. Fix this quickly before problems are
reported.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page-writeback.c')
0 files changed, 0 insertions, 0 deletions