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Date: Wed, 15 Feb 2012 12:29:06 +0100
Message-ID: <CAO+b5-rNF1R5NcSdVSsKLML4wyZBBGv-zUdq+B1y0kfHxLpupA@mail.gmail.com>
Subject: Re: Yet another hot unplug NULL pointer dereference (was Re: status
 of oops in sd_revalidate_disk?)
From: Bart Van Assche <bvanassche@acm.org>
To: "Jun'ichi Nomura" <j-nomura@ce.jp.nec.com>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>, jbottomley@parallels.com,
        linux-scsi@vger.kernel.org, Huajun Li <huajun.li.lee@gmail.com>,
        Axel Theilmann <theilmann@pre-sense.de>, linux-kernel@vger.kernel.org
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On Wed, Feb 15, 2012 at 3:26 AM, Jun'ichi Nomura <j-nomura@ce.jp.nec.com> wrote:
> I think this patch is good, too.
> Since QUEUE_FLAG_DEAD is also racy, it is not much different
> from queuedata check, IMO.

Are you sure ? As far as I know the block layer takes care of
synchronizing queue flag modifications against request_fn invocations.

Bart.
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