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From: Minchan Kim <minchan.kim@gmail.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	David Rientjes <rientjes@google.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH 02/11] oom: oom_kill_process() doesn't select kthread child
Date: Wed, 30 Jun 2010 22:55:03 +0900	[thread overview]
Message-ID: <20100630135503.GA15644@barrios-desktop> (raw)
In-Reply-To: <20100630182715.AA4B.A69D9226@jp.fujitsu.com>

On Wed, Jun 30, 2010 at 06:27:52PM +0900, KOSAKI Motohiro wrote:
> Now, select_bad_process() have PF_KTHREAD check, but oom_kill_process
> doesn't. It mean oom_kill_process() may choose wrong task, especially,
> when the child are using use_mm().

Is it possible child is kthread even though parent isn't kthread?

-- 
Kind regards,
Minchan Kim

  reply	other threads:[~2010-06-30 14:24 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-30  9:25 [mmotm 0611][PATCH 00/11] various OOM bugfixes v3 KOSAKI Motohiro
2010-06-30  9:27 ` [PATCH 01/11] oom: don't try to kill oom_unkillable child KOSAKI Motohiro
2010-06-30  9:27 ` [PATCH 02/11] oom: oom_kill_process() doesn't select kthread child KOSAKI Motohiro
2010-06-30 13:55   ` Minchan Kim [this message]
2010-07-01  0:07     ` KOSAKI Motohiro
2010-07-01 13:38       ` Minchan Kim
2010-06-30  9:28 ` [PATCH 03/11] oom: make oom_unkillable_task() helper function KOSAKI Motohiro
2010-06-30 14:19   ` Minchan Kim
2010-07-01  0:07     ` KOSAKI Motohiro
2010-06-30  9:29 ` [PATCH 04/11] oom: oom_kill_process() need to check p is unkillable KOSAKI Motohiro
2010-06-30 13:57   ` Minchan Kim
2010-06-30  9:30 ` [PATCH 05/11] oom: /proc/<pid>/oom_score treat kernel thread honestly KOSAKI Motohiro
2010-06-30 14:03   ` Minchan Kim
2010-07-01  0:07     ` KOSAKI Motohiro
2010-07-01 14:36       ` Minchan Kim
2010-06-30  9:31 ` [PATCH 06/11] oom: kill duplicate OOM_DISABLE check KOSAKI Motohiro
2010-06-30 14:10   ` Minchan Kim
2010-06-30  9:31 ` [PATCH 07/11] oom: move OOM_DISABLE check from oom_kill_task to out_of_memory() KOSAKI Motohiro
2010-06-30 14:20   ` Minchan Kim
2010-07-01  0:07     ` KOSAKI Motohiro
2010-06-30  9:32 ` [PATCH 08/11] oom: cleanup has_intersects_mems_allowed() KOSAKI Motohiro
2010-06-30  9:32 ` [PATCH 09/11] oom: remove child->mm check from oom_kill_process() KOSAKI Motohiro
2010-06-30 14:30   ` Minchan Kim
2010-06-30  9:33 ` [PATCH 10/11] oom: give the dying task a higher priority KOSAKI Motohiro
2010-06-30  9:35   ` KOSAKI Motohiro
2010-06-30 14:40     ` Minchan Kim
2010-07-02 21:49   ` Andrew Morton
2010-07-06  0:49     ` KOSAKI Motohiro
2010-07-06  0:50       ` [PATCH 1/2] security: add const to security_task_setscheduler() KOSAKI Motohiro
2010-07-06  0:51       ` [PATCH 2/2] sched: make sched_param arugment static variables in some sched_setscheduler() caller KOSAKI Motohiro
2010-07-06 22:13         ` Steven Rostedt
2010-07-06 23:12           ` Andrew Morton
2010-07-06 23:49             ` Steven Rostedt
2010-07-07  0:02               ` Andrew Morton
2010-07-07 19:43                 ` Peter Zijlstra
2010-06-30  9:34 ` [PATCH 11/11] oom: multi threaded process coredump don't make deadlock KOSAKI Motohiro

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