Re: [Xen-devel] Xen 3.3.1 latest / starting guests causes Oops in tapdisk?

[Ray Barnes <tical.net@xxxxxxxxx>]

Thanks, i'll switch to xen-unstable if I have problems with the workaround, which is (regrettably) to use file: instead of tap:aio: as the blkdev in the domU config files.

 

-Ray

 

 

On Thu, May 28, 2009 at 11:30 AM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:

It might be interesting to try xen-unstable which should now be switched
over to blktap2 by default. Quite apart from being interested as to how well
that works right now, I also imagine you can get quicker responses from the
developers of that. If it works, blktap2 would port over to 3.4 quite
easily. Probably 3.3 too.

 -- Keir

On 28/05/2009 14:55, "Ray Barnes" <tical.net@gmail.com> wrote:

> Thanks Keir.  I've been using the supplied 2.6.18-8 kernels from your source
> repository throughout this issue.  I just tried 3.4.0-release and the latest
> 3.4.0 from a pull this morning, no change.  Perhaps there's some way (other
> than abandoning blktap-backed guests) that I can work around it?
>  
> -Ray
>
>
>  
> On Thu, May 28, 2009 at 8:27 AM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
> wrote:

>> On 28/05/2009 13:14, "Ray Barnes" <tical.net <http://tical.net/> @gmail.com

>> <http://gmail.com/> > wrote:
>>
>>> Problem is present using CentOS 5.x guests using the Cent kernel also.  The
>>> aforementioned domU is Debian 4 though.  I've tried this under 3.3.1-release
>>> and the latest 3.3.1 from xen-3.3-testing as of two days ago with the same
>>> result.  I set maxium loop devices at 255 (was 8), no change.  Also, after
>>> the
>>> Oops is triggered, I can no longer start domUs (even good ones which would
>>> otherwise not exhibit the problem), until after a reboot.  Is this a Xen
>>> problem, or should I be looking at the OS or something else?
>>
>> Probably it's a dom0 kernel issue, in the blktap device driver.
>>
>>  -- Keir
>>
>>
>
>

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