linux-kernel - Re: current mainline ide doesn't like qemu/kvm (or vice versa)

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Date:	Fri, 08 Feb 2008 16:35:14 -0600
From:	Anthony Liguori <anthony@...emonkey.ws>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Christoph Hellwig <hch@....de>, bzolnier@...il.com,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: current mainline ide doesn't like qemu/kvm (or vice versa)

Alan Cox wrote:
> On Fri, 8 Feb 2008 16:25:08 +0100
> Christoph Hellwig <hch@....de> wrote:
> 
>> When trying to put some stress on qemu by running the xfs testsuite
>> I get the following:
>>
>> debian:~/xfs-cmds/xfstests# sh check 
>> [  438.166822] SGI XFS with ACLs, security attributes, realtime, large block numbers, no debug enabled
>> [  438.185557] SGI XFS Quota Management subsystem
>> [  438.193150] hdb: task_no_data_intr: status=0x41 { DriveReady Error }
>> [  438.194018] hdb: task_no_data_intr: error=0x04 { DriveStatusError }
>> [  438.194195] ide: failed opcode was: 0x9d
> 
> Drive aborted the command. Thats all correct.
>> and after that the kernel seems to hang.  Qemu is emulating a piix3
>> device, and using the piix driver.  This is on a pretty old kvm (version
>> 28) because newer ones don't even compile.

kvm-28 is ancient and there have been IDE emulation fixes since.  I am 
not aware of issues building KVM either.  The problems you reported a 
month ago on kvm-devel have been fixed.

> Old Qemu is not really a credible IDE emulation. The chances are that as
> with all the libata bugs I close for qemu the problem is qemu. Please
> file a bug with the qemu people.

Agreed, this is very likely to be a QEMU issue (that may have already 
been fixed).

Regards,

Anthony Liguori

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