[Pkg-xen-devel] Bug#573210: Bug#573210: xen-hypervisor-3.2-1-amd64: Xen domU sometimes hogs CPU and doesn't respond

[Pasi Kärkkäinen]

On Tue, Mar 09, 2010 at 08:18:54PM +0100, Ondrej Kunc wrote:
> Package: xen-hypervisor-3.2-1-amd64
> Version: 3.2.1-2
> Severity: normal
>
> *** Please type your report below this line ***
> Hi,
>
> Recently I've experienced some crashes of Xen domU (also debian Lenny,  
> running same kernel as dom0 (linux-image-2.6.26-xen-amd64)).
> At xm top that domain appears as running, but hogs all CPUs, because  
> this problem has appeared on two identic servers (Supermicro X7SBi, QC  
> Xeon, 8G DDR II). I think that problem cannot be in hardware. We were  
> running this configuration on some other servers with core2 duo  
> processor (only dualcore) and there this problem never appeared. I've  
> saved a core-dump of affected domU, but it's really big(1,1GB), so I'll  
> not attach it to bugreport, but it is available for debugging.
>
> Thanks for potential interest in debugging.
>

Hello,

It's this problem:
http://moblog.wiredwings.com/index.php?url=archives/20090227/Lennys-Xen-Kernel-2.6.26-Causes-DomU-Freezes.html

I tried getting debug info (stack traces) of the crashed guest here:
http://lists.xensource.com/archives/html/xen-devel/2010-03/msg00281.html

but it'd need more investigations and actual debugging..

-- Pasi