Re: [Xen-users] Xen 4.0 - prerequisites for succesfull live migration?

["Olivier B." <xen.list@xxxxxxxxx>]

Which kernel are you using on DomU ?

For me, the same DomU can me migrate or no, depending only of the kernel 
used on it. With a 2.6.32.42 pvops, I can't migrate any DomU, if I 
reboot the DomU with a 2.6.39.2 pvops, it works fine.
Olivier

Le 08/07/2011 14:15, Danilo Godec a écrit :
> On 07/07/2011 11:32 AM, Mark Dokter wrote:
> > I had migration and save/restore issues with xen 4.0 on debian and
> > ubuntu. (See thread "Live migration on xen 4.0.1 fails" on this list
> > (dated 04/2011). I did not really find out, what went wrong. Now I use
> > xen 4.1 and migration works (with 2.6.38+ pv-on-hvm domUs).
> Thanks, I'll try to setup a lab to test 4.1...
>
> But in the mean time I made some discoveries:
>
> I'm using the 'vcpus=X' and 'vcpu_avail='Y' to start my VM's with 'Y'
> VCPU's, but still be able to add some VCPU's later if needed (where X is
> the number of cores in my biggest server and Y is typically 2).
> In this case, live migration fails.
>
> If I omit the 'vcpu_avail' option and only use 'vcpus=Y', live migration
> seems to work. However 'xm console' doesn't work after migration and
> 'xm shutdown' doesn't work either - instead the CPU usage according to
> xentop shoots up to 100% and ultimately the DomU has to be destroyed.
>
>
> Danilo
>
> PS: I'm using para-virtualisation. Would I be better off using HVM?
>
>
> > > So this is the first problem. I wonder if there is a known problem
> > > with this specific Xen version or something specific to your setup on
> > > OpenSUSE?
> > >
> > > I've added the opensuse-virtual list to the CC just in case someone
> > > can shed some light on it. (here is this message in context
> > > http://lists.xensource.com/archives/html/xen-users/2011-07/msg00090.html)
> > >
> > >
> > > Thanks,
> > > Todd
> > regards,
> >
> > Mark
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users

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