]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
oom: dump_tasks use find_lock_task_mm too
authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Tue, 10 Aug 2010 00:18:46 +0000 (17:18 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 10 Aug 2010 03:44:56 +0000 (20:44 -0700)
commitc55db95788a2a55a77f5a3ced1e59578710440b2
tree275a0c97bfe408ea926dfe14864e476d719859e9
parentdd8e8f405ca386c7ce7cbb996ccd985d283b0e03
oom: dump_tasks use find_lock_task_mm too

dump_task() should use find_lock_task_mm() too. It is necessary for
protecting task-exiting race.

dump_tasks() currently filters any task that does not have an attached
->mm since it incorrectly assumes that it must either be in the process of
exiting and has detached its memory or that it's a kernel thread;
multithreaded tasks may actually have subthreads that have a valid ->mm
pointer and thus those threads should actually be displayed.  This change
finds those threads, if they exist, and emit their information along with
the rest of the candidate tasks for kill.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/oom_kill.c