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From: Roland McGrath <roland@redhat.com>
To: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Li Zefan <lizf@cn.fujitsu.com>,
	balbir@linux.vnet.ibm.com,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Pavel Emelianov <xemul@openvz.org>
Subject: Re: kernel warning: tried to kill an mm-less task!
Date: Tue, 15 Apr 2008 13:58:30 -0700 (PDT)	[thread overview]
Message-ID: <20080415205830.2BA4B26FA5E@magilla.localdomain> (raw)
In-Reply-To: Oleg Nesterov's message of  Tuesday, 15 April 2008 10:17:16 +0400 <20080415061716.GA89@tv-sign.ru>

> 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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      parent reply	other threads:[~2008-04-15 20:58 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-04-14  7:09 Li Zefan
2008-04-14  7:46 ` KAMEZAWA Hiroyuki
2008-04-14  8:01 ` Balbir Singh
2008-04-14  8:06   ` Li Zefan
2008-04-15  3:47     ` Li Zefan
2008-04-15  6:17       ` Oleg Nesterov
2008-04-15 10:19         ` s/PF_BORROWED_MM/PF_KTHREAD/ (was: kernel warning: tried to kill an mm-less task!) Oleg Nesterov
2008-04-15 17:10           ` Jeff Dike
2008-04-15 20:58         ` Roland McGrath [this message]

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