tree 1b491946b967b573c0394c58032fcc38e8aeca1d
parent 85bd839983778fcd0c1c043327b14a046e979b39
author Vladimir Davydov <vdavydov@parallels.com> 1433960086 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1433979823 -0700

memcg: do not call reclaim if !__GFP_WAIT

When trimming memcg consumption excess (see memory.high), we call
try_to_free_mem_cgroup_pages without checking if we are allowed to sleep
in the current context, which can result in a deadlock.  Fix this.

Fixes: 241994ed8649 ("mm: memcontrol: default hierarchy interface for memory")
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: 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>