linux-kernel - Re: [PATCH 09/12] oom: remove PF

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Message-Id: <20100603153623.40875640.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 3 Jun 2010 15:36:23 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	"Luis Claudio R. Goncalves" <lclaudio@...g.org>,
	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>,
	Nick Piggin <npiggin@...e.de>
Subject: Re: [PATCH 09/12] oom: remove PF_EXITING check completely

On Thu,  3 Jun 2010 15:25:18 +0900 (JST)
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote:

> Currently, PF_EXITING check is completely broken. because 1) It only
> care main-thread and ignore sub-threads 2) If user enable core-dump
> feature, it can makes deadlock because the task during coredump ignore
> SIGKILL.
> 
> The deadlock is certenaly worst result, then, minor PF_EXITING
> optimization worth is relatively ignorable.
> 
> This patch removes it.
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Acked-by: Oleg Nesterov <oleg@...hat.com>

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


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