linux-kernel - Re: Yet another hot unplug NULL pointer dereference (was Re: status of oops in sd_revalidate

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Message-ID: <CAO+b5-rNF1R5NcSdVSsKLML4wyZBBGv-zUdq+B1y0kfHxLpupA@mail.gmail.com>
Date:	Wed, 15 Feb 2012 12:29:06 +0100
From:	Bart Van Assche <bvanassche@....org>
To:	"Jun'ichi Nomura" <j-nomura@...jp.nec.com>
Cc:	Stefan Richter <stefanr@...6.in-berlin.de>,
	jbottomley@...allels.com, linux-scsi@...r.kernel.org,
	Huajun Li <huajun.li.lee@...il.com>,
	Axel Theilmann <theilmann@...-sense.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Yet another hot unplug NULL pointer dereference (was Re: status
 of oops in sd_revalidate_disk?)

On Wed, Feb 15, 2012 at 3:26 AM, Jun'ichi Nomura <j-nomura@...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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