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