linux-kernel - Re: kernel warning: tried to kill an mm-less task!

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Message-Id: <20080415205830.2BA4B26FA5E@magilla.localdomain>
Date:	Tue, 15 Apr 2008 13:58:30 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Oleg Nesterov <oleg@...sign.ru>
Cc:	Li Zefan <lizf@...fujitsu.com>, balbir@...ux.vnet.ibm.com,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Pavel Emelianov <xemul@...nvz.org>
Subject: Re: kernel warning: tried to kill an mm-less task!

> Roland, what do you think about the coredump? Looks like we have the ancient
> bug, zap_threads() can hit the kernel thread.

I think you're right.  But I've never known much about the ->mm maintenance
code or the aio use_mm logic.  So I'm just going from a quick glance.
(That part of the zap_threads() logic predates you or I fiddling with it.)


Thanks,
Roland
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