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

[George Shuklin <george.shuklin@xxxxxxxxx>]

I know this bug:

if vcpu_max > vcpu_online migration of SUSE fails badly. Confirmed with 
2.6.34, 2.6.37 and XCP (xen 3.4) multiple times.

On 08.07.2011 16:15, Danilo Godec wrote:
> 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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