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Date: Fri, 2 Apr 2010 09:41:17 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [patch -mm 3/5] oom: avoid sending exiting tasks a SIGKILL
Message-Id: <20100402094117.7b3856fa.kamezawa.hiroyu@jp.fujitsu.com>
In-Reply-To: <alpine.DEB.2.00.1004011243300.13247@chino.kir.corp.google.com>
References: <alpine.DEB.2.00.1004011240370.13247@chino.kir.corp.google.com>
	<alpine.DEB.2.00.1004011243300.13247@chino.kir.corp.google.com>
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Sender: owner-linux-mm@kvack.org
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Oleg Nesterov <oleg@redhat.com>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Rik van Riel <riel@redhat.com>, linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>

On Thu, 1 Apr 2010 12:44:34 -0700 (PDT)
David Rientjes <rientjes@google.com> wrote:

> It's unnecessary to SIGKILL a task that is already PF_EXITING and can
> actually cause a NULL pointer dereference of the sighand if it has
> already been detached.  Instead, simply set TIF_MEMDIE so it has access
> to memory reserves and can quickly exit as the comment implies.
> 
> Signed-off-by: David Rientjes <rientjes@google.com>

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>


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