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Re: [Xen-devel] VM hangs after live migration

To: Muriel <mucawhite@xxxxxxxxx>
Subject: Re: [Xen-devel] VM hangs after live migration
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Wed, 12 Jan 2011 10:20:06 +0000
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Hi Muriel,

(I reordered the quoted material slightly)

On Wed, 2011-01-12 at 09:41 +0000, Muriel wrote:
> Hi all,
> i'm not sure that this is the right place to write but i hope you can 
> help me.

For XenServer specific issues you should generally either contact
XenServer support or make use of the appropriate XenServer forums rather
than this list which is for the development of the upstream xen.org
version of Xen.

> to the kernel and now:
> - when i try to migrate the vm from a member of the pool to another 
> everything works fine;
> - when i try to migrate the vm from a member of the pool to the master 
> the vm hangs (exactly as the

If you see different behaviour based upon which hosts you are migrating
between then that, to me, suggests a XenServer issue in the first

> I have many vm on Xenserver 5.5 and starting with kernel i had 
> many problems with the live migration:
> - with and higher the vm hang after migration (no console output)
> - and higher have this kernel bug:
> kernel BUG at /build/buildd/linux-2.6.32/arch/x86/xen/spinlock.c:343!
> invalid opcode: 0000 [#1] SMP

However if you have reason to believe that the issue is specific to the
guest kernel rather than the use of XenServer as a host then please
provide full details of the guest, i.e. the distribution in use, where
the kernel came from, the .config used to build it, the guest
configuration and full guest console logs etc.

> After some research on the mailing list i tried to apply this patch:
> http://xen.1045712.n5.nabble.com/PATCH-xen-events-do-not-unmask-polled-ipis-on-restore-td3241695.html

There was a second patch at the end of that thread, which did you use?

Have you tried the xen/stable-2.6.32.x branch from xen.git?


> Any suggestions?
> Muriel
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> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

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