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RE: [Xen-devel] Unresolved - qemu-dm crash under high dom0 disk load

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "Randy McAnally" <rsm@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Unresolved - qemu-dm crash under high dom0 disk load
From: "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx>
Date: Wed, 30 Jan 2008 10:37:07 -0700
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If this solves the problem, it would be nice to slide it into 3.1.3 final.

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx]On Behalf Of Keir Fraser
> Sent: Wednesday, January 30, 2008 9:33 AM
> To: Randy McAnally; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Unresolved - qemu-dm crash under 
> high dom0 disk
> load
> 
> 
> Please try the attached patch.
> 
>  -- Keir
> 
> On 30/1/08 16:09, "Randy McAnally" <rsm@xxxxxxxxxxxxx> wrote:
> 
> > This is regarding a long unresolved issue with HVM qemu-dm 
> crashing under
> > heavy Dom0 IO load.
> >
> > I decided to make a new thread on this seeing that I found 
> many old ones
> > scattered about with no resolution:
> >
> > Here are old threads regarding the same/similar issue
> >
> > 
> http://lists.xensource.com/archives/html/xen-users/2007-08/msg
00135.html
> http://lists.xensource.com/archives/html/xen-users/2007-07/msg00624.html
>
> Old bug reports of the issue:
>
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=542
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1038
>
> In 1038, spam@xxxxxxx _incorrectly_ reports it is fixed in 3.1.1 -- Not only
> can I find any evidence of this, I can EASILY reproduce the crash over and
> over with 3.1.3-rc2.
>
> I have a dev. Xen box available for anyone who wants access for stack
> traces, ect.
>
> Unfortunately I myself do not have enough knowledge to find the problem
> myself, however I am available to instruct on how to produce the bug, run
> stack traces, help organize this effort, and provide unrestricted access to
> this dev machine if needed.




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