From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1IFNpM-000368-WE
	for qemu-devel@nongnu.org; Mon, 30 Jul 2007 01:29:57 -0400
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1IFNpM-00035s-Cb
	for qemu-devel@nongnu.org; Mon, 30 Jul 2007 01:29:56 -0400
Received: from [199.232.76.173] (helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1IFNpM-00035p-3Z
	for qemu-devel@nongnu.org; Mon, 30 Jul 2007 01:29:56 -0400
Received: from mout.perfora.net ([74.208.4.194])
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <dmc@filteredperception.org>) id 1IFNpL-000803-Nf
	for qemu-devel@nongnu.org; Mon, 30 Jul 2007 01:29:55 -0400
Message-ID: <46AD7557.3020608@filteredperception.org>
Date: Mon, 30 Jul 2007 00:21:27 -0500
From: dmc <dmc@filteredperception.org>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] 	fedora 7,
	cdrom and GPCMD_GET_EVENT_STATUS_NOTIFICATION
References: <1185574745.6486.166.camel@fuego>
In-Reply-To: <1185574745.6486.166.camel@fuego>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Reply-To: qemu-devel@nongnu.org
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu-devel@nongnu.org

Matthew Kent wrote:
> Been digging around for a solution or confirmation of this for a while
> now without much luck. Forgive me if there's a solution to this I'm just
> not seeing.
> 
> Getting some ugly libata related errors in my guest like
> 
> ata2: DRQ=1 with device error, dev_stat 0x49
> ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> ata2.00: cmd a0/00:00:00:00:20/00:00:00:00:00/a0 tag 0 cdb 0x4a data 8
> in
>          res 41/50:03:00:00:20/00:00:00:00:00/a0 Emask 0x3 (HSM
> violation)
> ata2: soft resetting port
> ata2.00: configured for MWDMA2
> ata2: EH complete
> 
> when running a stock install of Fedora 7 (x86_64) in qemu (the stock
> fedora package of qemu 0.9.0 or kvm-33). Tried upgrading to the latest
> updated kernel 2.6.22.1-33.fc7, then the latest development one with no
> change.
> 
> Tracked it down to hald-addon-storage which is polling the cdrom with
> SG_IO and GPCMD_GET_EVENT_STATUS_NOTIFICATION which is trying to "check
> if eject button was pressed". 
> 
> In my search I found a brief example program in this ticket
> https://bugzilla.novell.com/show_bug.cgi?id=145147 which replicates the
> issue reliably here without involving hal.
> 
> The workaround I found was to run
> 
> hal-disable-polling --device /dev/scd0
> 
> but given the lack of success I had finding other people reporting this
> exact issue in libata proper, I'm guessing it might be something with
> the cd-rom emulation of which fixing is way over my head :)
> 
> Guest dmesg and test case attached.
> 
> Anyone else seeing this?


Yeah.  I mentioned it on fedora-devel@redhat.com.  I was forwarded to a link 
which mentioned the workaround you mentioned, as well as prefixing it with a 
'killall hald-addon-storage'.

I also ran across this little patch, which I haven't bothered to try yet.

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=431829

If you try it, let me know if it works.

-dmc