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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2016-05-26 15:16:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-26 15:35:44 -0700 |
| commit | 1ebab2db065e99eed9ab2304d3b7ad25c9568612 (patch) | |
| tree | e235330fb357cb820a85fa6e3fcdb8c9666e3c2c /mm/memcontrol.c | |
| parent | 1f3a437fa027c75b26a64e2e71d7c374ff70f866 (diff) | |
| download | lwn-1ebab2db065e99eed9ab2304d3b7ad25c9568612.tar.gz lwn-1ebab2db065e99eed9ab2304d3b7ad25c9568612.zip | |
memcg: fix mem_cgroup_out_of_memory() return value.
mem_cgroup_out_of_memory() is returning "true" if it finds a TIF_MEMDIE
task after an eligible task was found, "false" if it found a TIF_MEMDIE
task before an eligible task is found.
This difference confuses memory_max_write() which checks the return
value of mem_cgroup_out_of_memory(). Since memory_max_write() wants to
continue looping, mem_cgroup_out_of_memory() should return "true" in
this case.
This patch sets a dummy pointer in order to return "true".
Link: http://lkml.kernel.org/r/1463753327-5170-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index cf428d7b9a03..f6477a9dbe7a 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1302,6 +1302,8 @@ static bool mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask, mem_cgroup_iter_break(memcg, iter); if (chosen) put_task_struct(chosen); + /* Set a dummy value to return "true". */ + chosen = (void *) 1; goto unlock; case OOM_SCAN_OK: break; |