linux-kernel - Re: [PATCH rh6] mm: skip zombie in OOM-killer

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Message-Id: <20110308102508.7E99.A69D9226@jp.fujitsu.com>
Date:	Tue,  8 Mar 2011 10:25:34 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Andrey Vagin <avagin@...nvz.org>
Cc:	kosaki.motohiro@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH rh6] mm: skip zombie in OOM-killer

> A parent may wait a memory and zombie will prevent killing another task.
> 
> Signed-off-by: Andrey Vagin <avagin@...nvz.org>
> ---
>  mm/oom_kill.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> index 7dcca55..2fc554e 100644
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -311,7 +311,7 @@ static struct task_struct *select_bad_process(unsigned int *ppoints,
>  		 * blocked waiting for another task which itself is waiting
>  		 * for memory. Is there a better alternative?
>  		 */
> -		if (test_tsk_thread_flag(p, TIF_MEMDIE))
> +		if (test_tsk_thread_flag(p, TIF_MEMDIE) && p->mm)
>  			return ERR_PTR(-1UL);

OK. Good catch.

	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>




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