linux-kernel - [PATCH 5/5] oom: __oom_kill_task() must use find_lock_task

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Message-Id: <20100531183727.184F.A69D9226@jp.fujitsu.com>
Date:	Mon, 31 May 2010 18:38:14 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Oleg Nesterov <oleg@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Nick Piggin <npiggin@...e.de>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [PATCH 5/5] oom: __oom_kill_task() must use find_lock_task_mm() too

From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Subject: [PATCH 5/5] oom: __oom_kill_task() must use find_lock_task_mm() too

__oom_kill_task also use find_lock_task_mm(). because if sysctl_oom_kill_allocating_task
is true, __out_of_memory() don't call select_bad_process().

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 mm/oom_kill.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 30d9da0..f6aa3fc 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -394,12 +394,11 @@ static void __oom_kill_task(struct task_struct *p, int verbose)
 		return;
 	}
 
-	task_lock(p);
-	if (!p->mm) {
+	p = find_lock_task_mm(p);
+	if (!p) {
 		WARN_ON(1);
 		printk(KERN_WARNING "tried to kill an mm-less task %d (%s)!\n",
 			task_pid_nr(p), p->comm);
-		task_unlock(p);
 		return;
 	}
 
-- 
1.6.5.2



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