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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2010-08-11 05:03:00 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 19:59:19 +0400
commit158e0a2d1b3cffed8b46cbc56393a1394672ef79 (patch)
treea044d53137609fdfc8c1afdde366b3e205c96eda /include/linux/oom.h
parent73045c47b6facbdf4656e6763c8cb469de4337e2 (diff)
downloadlinux-158e0a2d1b3cffed8b46cbc56393a1394672ef79.tar.xz
memcg: use find_lock_task_mm() in memory cgroups oom
When the OOM killer scans task, it check a task is under memcg or not when it's called via memcg's context. But, as Oleg pointed out, a thread group leader may have NULL ->mm and task_in_mem_cgroup() may do wrong decision. We have to use find_lock_task_mm() in memcg as generic OOM-Killer does. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/oom.h')
-rw-r--r--include/linux/oom.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/oom.h b/include/linux/oom.h
index f209b683e118..5e3aa8311c5e 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -66,6 +66,8 @@ static inline void oom_killer_enable(void)
extern unsigned long badness(struct task_struct *p, struct mem_cgroup *mem,
const nodemask_t *nodemask, unsigned long uptime);
+extern struct task_struct *find_lock_task_mm(struct task_struct *p);
+
/* sysctls */
extern int sysctl_oom_dump_tasks;
extern int sysctl_oom_kill_allocating_task;