Re: [Xen-devel] Re: kernel BUG at arch/x86/xen/mmu.c:1860!

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Apr 15, 2011 at 09:37:28AM +0200, Joerg Stephan wrote:
> Hey guys,
>
> i just wanne report that our debian squeeze xen machines are also  
> influenced by this bug, and we tried the workaround with the debug option 
> by building our own
>
> linux-image-2.6.32-5-xen-amd64_2.6.32-31_amd64.deb
>
> but this isnt a workaround really, we tested it on an 40 vmachines dom0  
> and it just dont work, of course the lvm works but the machine is slow as 
> hell and runs into several kernel errors within a few hours
>
> [46566.052925] BUG: soft lockup - CPU#0 stuck for 61s! [qemu-dm:6292]
>
> in this case xentop shows an 500% CPU usage by the dom0, we experience an 
> 85%st value.
>
> So, i think this should be fixed soon, so what is the status of the issue?
>

Hello,

Fix for this bug has been merged to Jeremy's xen.git xen/stable-2.6.32.x branch.

See: 
http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=commit;h=ae333e97552c81ab10395ad1ffc6d6daaadb144a
in: 
http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=xen/stable-2.6.32.x

So the upstream xen/stable-2.6.32.x shouldn't be affected of this issue 
anymore..
Can you verify xen/stable-2.6.32.x works OK for you?

-- Pasi


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