WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

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

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Xen 3.3.1 latest / starting guests causes Oops in tapdisk?
From: Ray Barnes <tical.net@xxxxxxxxx>
Date: Thu, 28 May 2009 12:19:51 -0400
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Thu, 28 May 2009 09:20:28 -0700
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=x+qlOKpVBui7xYJgk0/3+jBY0CsrbQV0uwgMnFCYNls=; b=tzvkiGG+SylxdMDHz3vKbdTrMax4geJ0HRjvej7NrJC1IQtaAgcPFzNOdPxspTvJLI xjiGJCqg1hW3DrHZD3aWXRcDkFGx4g1hIO4mJ7sQs/Xl8RK3yj9UAE5fYGBbCsLbtjoq RopY7UdHtDTBl1Q5QtRVbCtgetIJWb1NPU08c=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=q/GEZHwDxgv148hDnksV2irI+iMJpIKuFKPYTaCc/VkDRmYVC0IUXqKRboPGj89uGQ kaC29TY0ZU6HwudokHpVCHGlDy1Q5A7E67hTRzdjUujQaVcKfU+wL4q/eyTDmY/zvPGO D0yFOlfBeW8y0Z6CVlxXJMkvj8dyd4+qNNf2w=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <C6446CC2.C166%keir.fraser@xxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <afa5bb590905280655w1a60e5cai84553cecf37b0354@xxxxxxxxxxxxxx> <C6446CC2.C166%keir.fraser@xxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
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
>>
>>
>
>



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel