linux-kernel - Re: [regression] CD-ROM polling blocks suspend on some machines (Re: [PATCH 1/2] cdrom: always check_disk

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Message-ID: <20111026222510.GK24261@google.com>
Date:	Wed, 26 Oct 2011 15:25:10 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Matthijs Kooijman - Brevidius <matthijs@...vidius.nl>,
	Gaudenz Steinlin <gaudenz@...ian.org>,
	linux-kernel@...r.kernel.org,
	Jameson Graef Rollins <jrollins@...estructure.net>,
	Jonathan Nieder <jrnieder@...il.com>,
	Jens Axboe <axboe@...nel.dk>, Amit Shah <amit.shah@...hat.com>,
	David Zeuthen <zeuthen@...il.com>,
	Martin Pitt <martin.pitt@...ntu.com>
Subject: Re: [regression] CD-ROM polling blocks suspend on some machines
 (Re: [PATCH 1/2] cdrom: always check_disk_change() on open)

Hello,

On Wed, Oct 26, 2011 at 08:26:50PM +0200, Matthijs Kooijman - Brevidius wrote:
> Hi folks,
> 
> it seems this same problem also occurs with udisks-daemon, though the
> behaviour is slightly different (it seems to hang even before
> undocking, I _think_).
> 
> Anyway, here's the dmesg output when trying to suspend:

Can you please turn on CONFIG_FRAME_POINTER, trigger the problem, wait
for some minutes and then do sysrq-t and report the dmesg output?
This could be from DEAD state handling race currently being addressed
in upstream.

Thanks.

-- 
tejun
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