memcg: fix oom killing a child process in an other cgroup
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Mon, 22 Feb 2010 20:44:14 +0000 (12:44 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 23 Feb 2010 03:50:34 +0000 (19:50 -0800)
commit5a2d41961dd6815b874b5c0afec0ac96cd90eea4
treeaf3d153f9615d9c11feb378f7821c0f280012b52
parentbee415ce427d1eab6cfb30221461c7d20cbf1903
memcg: fix oom killing a child process in an other cgroup

Presently the oom-killer is memcg aware and it finds the worst process
from processes under memcg(s) in oom.  Then, it kills victim's child
first.

It may kill a child in another cgroup and may not be any help for
recovery.  And it will break the assumption users have.

This patch fixes it.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/oom_kill.c