linux-kernel - Re: [PATCH] exit: fix oops in sync_mm

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Message-ID: <4B9FC557.2060002@redhat.com>
Date:	Tue, 16 Mar 2010 13:52:23 -0400
From:	Rik van Riel <riel@...hat.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	cl@...ux-foundation.org, lee.schermerhorn@...com,
	rientjes@...gle.com, Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	"David S. Miller" <davem@...emloft.net>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] exit: fix oops in sync_mm_rss

On 03/16/2010 01:08 PM, Michael S. Tsirkin wrote:

> (note: handle_rx_net is a work item using workqueue in question).
> sync_mm_rss+0x33/0x6f gave me a hint. I also tried reverting
> 34e55232e59f7b19050267a05ff1226e5cd122a5 and the oops goes away.
>
> The module in question calls use_mm and later unuse_mm from a kernel
> thread.  It is when this kernel thread is destroyed that the crash
> happens.
>
> Signed-off-by: Michael S. Tsirkin<mst@...hat.com>

Reviewed-by: Rik van Riel <riel@...hat.com>

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