linux-kernel - Re: Kernel crash in icq_free_icq

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Message-ID: <20120118010323.GA32160@htj.dyndns.org>
Date:	Tue, 17 Jan 2012 17:03:23 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Shaohua Li <shaohua.li@...el.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Jens Axboe <axboe@...nel.dk>
Subject: Re: Kernel crash in icq_free_icq_rcu

Hello,

On Wed, Jan 18, 2012 at 09:01:00AM +0800, Shaohua Li wrote:
> 2012/1/18 Vivek Goyal <vgoyal@...hat.com>:
> >> Does the following patch make any difference?
> >
> > Nope. Still can reproduce the issue.
>
> I had similar issue too. Looks ioc_create_icq finds an icq (in ioc_lookup_icq)
> the icq is in rcu free (it has __rcu_icq_cache set)

Vivek is seeing the problem while switching elevators.  Are you too?
Or is it during normal operation?

Thanks.

--
tejun
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