AW: [Xen-users] Reverse migration breaks/freezes VM

["Rustedt, Florian" <Florian.Rustedt@xxxxxxxxxxx>]

No, just paras.
Could  that help?

Florian

> -----Ursprüngliche Nachricht-----
> Von: James Harper [mailto:james.harper@xxxxxxxxxxxxxxxx] 
> Gesendet: Freitag, 6. März 2009 00:57
> An: Rustedt, Florian; xen-users@xxxxxxxxxxxxxxxxxxx
> Betreff: RE: [Xen-users] Reverse migration breaks/freezes VM
> 
> Are they HVM domains?
> 
> James
> 
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users- 
> > bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Rustedt, Florian
> > Sent: Friday, 6 March 2009 00:13
> > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-users] Reverse migration breaks/freezes VM
> > 
> > Hello list,
> > 
> > I've got strange phenomenons with migrations. I think it's 
> a bug, but
> am
> > not sure, so i am asking for your help to find this ou, please ;)
> > 
> > First the construct:
> > Two HP DL180G5(xen0,xen1) with dual-quadcore each, 8G RAM.
> > 
> > On each a dom0 with selfcompiled(because of network drivers) gentoo-
> > sources-xen-2.6.27_amd64 and Xen 3.3.0. The installation is 
> completely
> the
> > same (rsynct), only different in ip and hostname.
> > 
> > Both share a drbd0(v8.3.0) device. On it an lvm with one lv per vm.
> > 
> > Now what's the problem:
> > 
> > If i migrate a running vm(mx1-smartnet-de) from xen0 to 
> xen1, it seems
> to
> > work.
> > I could do a "xm migrate mx1-smartnet-de xen1" without any 
> interuption 
> > while having a ssh-connection to the vm and downloading a
> kernel-source in
> > it.
> > 
> > Then i did a "xm migrate mx1-smartnet-de xen0" on xen1 to 
> move it back 
> > again. After that, the vm freezes at 100%CPU and that's it! Can't
> connect
> > to it any more, whether via ssh nor via vnc/fb or console. Only "xm 
> > destroy" could help, "xm shutdown" has no impact.
> > 
> > For debugging, i added the concerning parts of the xend.log 
> from each
> and
> > the kernel-configs, so that you could try to help me find the prob
> perhaps
> > in the logs?
> > 
> > Just after having started the vm:
> > xen0_after_start_of_vm.log
> > 
> > Then after the first migration:
> > xen0_after_migrate_to_xen1_of_vm.log
> > xen1_after_migrate_to_xen1_of_vm.log
> > 
> > And last, after the reverse:
> > xen0_after_migrate_back_from_xen1_of_vm.log
> > xen1_after_migrate_back_from_xen1_of_vm.log
> > 
> > I don't believe it is a drbd/lvm problem, because drbd keeps in "0:
> > cs:Connected ro:Primary/Primary ds:UpToDate/UpToDate C 
> r---" and there
> are
> > no lv-concerning log-entries in syslog.
> > 
> > There are of course errors concerning "retry suspend domain failed",
> but
> > there's no hint, WHY this has got failed?
> > 
> > Kind regards, Florian
> >
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