From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id 28B0E6B01C4 for ; Wed, 30 Jun 2010 05:28:41 -0400 (EDT) Received: from m1.gw.fujitsu.co.jp ([10.0.50.71]) by fgwmail6.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o5U9Sc6P023008 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Wed, 30 Jun 2010 18:28:38 +0900 Received: from smail (m1 [127.0.0.1]) by outgoing.m1.gw.fujitsu.co.jp (Postfix) with ESMTP id 69EA245DE50 for ; Wed, 30 Jun 2010 18:28:38 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (s1.gw.fujitsu.co.jp [10.0.50.91]) by m1.gw.fujitsu.co.jp (Postfix) with ESMTP id 46FF545DE4F for ; Wed, 30 Jun 2010 18:28:38 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 347051DB803F for ; Wed, 30 Jun 2010 18:28:38 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.249.87.104]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id E4E8F1DB8048 for ; Wed, 30 Jun 2010 18:28:37 +0900 (JST) From: KOSAKI Motohiro Subject: [PATCH 03/11] oom: make oom_unkillable_task() helper function In-Reply-To: <20100630172430.AA42.A69D9226@jp.fujitsu.com> References: <20100630172430.AA42.A69D9226@jp.fujitsu.com> Message-Id: <20100630182752.AA4E.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Wed, 30 Jun 2010 18:28:37 +0900 (JST) Sender: owner-linux-mm@kvack.org To: LKML , linux-mm , Andrew Morton , Minchan Kim , David Rientjes , KAMEZAWA Hiroyuki Cc: kosaki.motohiro@jp.fujitsu.com List-ID: Now, we have the same task check in two places. Unify it. Reviewed-by: Minchan Kim Signed-off-by: KOSAKI Motohiro --- mm/oom_kill.c | 33 ++++++++++++++++++++++----------- 1 files changed, 22 insertions(+), 11 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index dc8589e..a4a5439 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -101,6 +101,26 @@ static struct task_struct *find_lock_task_mm(struct task_struct *p) return NULL; } +/* return true if the task is not adequate as candidate victim task. */ +static bool oom_unkillable_task(struct task_struct *p, struct mem_cgroup *mem, + const nodemask_t *nodemask) +{ + if (is_global_init(p)) + return true; + if (p->flags & PF_KTHREAD) + return true; + + /* When mem_cgroup_out_of_memory() and p is not member of the group */ + if (mem && !task_in_mem_cgroup(p, mem)) + return true; + + /* p may not have freeable memory in nodemask */ + if (!has_intersects_mems_allowed(p, nodemask)) + return true; + + return false; +} + /** * badness - calculate a numeric value for how bad this task has been * @p: task struct of which task we should calculate @@ -295,12 +315,7 @@ static struct task_struct *select_bad_process(unsigned long *ppoints, for_each_process(p) { unsigned long points; - /* skip the init task and kthreads */ - if (is_global_init(p) || (p->flags & PF_KTHREAD)) - continue; - if (mem && !task_in_mem_cgroup(p, mem)) - continue; - if (!has_intersects_mems_allowed(p, nodemask)) + if (oom_unkillable_task(p, mem, nodemask)) continue; /* @@ -467,11 +482,7 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, if (child->mm == p->mm) continue; - if (child->flags & PF_KTHREAD) - continue; - if (mem && !task_in_mem_cgroup(child, mem)) - continue; - if (!has_intersects_mems_allowed(child, nodemask)) + if (oom_unkillable_task(p, mem, nodemask)) continue; /* badness() returns 0 if the thread is unkillable */ -- 1.6.5.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org