linux-kernel - Re: [PATCH 6/9] oom: use same_thread

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Message-Id: <20100617084452.FB39.A69D9226@jp.fujitsu.com>
Date:	Thu, 17 Jun 2010 10:51:34 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: [PATCH 6/9] oom: use same_thread_group instead comparing ->mm

> On Wed, Jun 16, 2010 at 08:34:02PM +0900, KOSAKI Motohiro wrote:
> > Now, oom are using "child->mm != p->mm" check to distinguish subthread.
> > But It's incorrect. vfork() child also have the same ->mm.
> > 
> > This patch change to use same_thread_group() instead.
> 
> Hmm. I think we don't use it to distinguish subthread. 
> We use it for finding child process which is not vforked. 
> 
> I can't understand your point. 

Thank you. my fault. respin.



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