Re: [Xen-devel] rhel6 guest fail to do save?

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Thu, Jan 13, 2011 at 07:36:02AM +0000, Ian Campbell wrote:
> On Wed, 2011-01-12 at 17:16 +0000, Ian Jackson wrote: 
> > Zhang, Yang Z writes ("RE: [Xen-devel] rhel6 guest fail to do save?"):
> > > From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
> > > > I think people have generally been able to save/restore with rhel6,
> > > > but there are some issues with live migration between different MHz 
> > > > CPUs,
> > > > for example: https://bugzilla.redhat.com/show_bug.cgi?id=663755
> > ...
> > > Sorry, I mean the HVM.
> > 
> > This is known not to work.  It fails in my automatic tests.
> > 
> > The current RHEL6 kernel has enough pv-on-hvm drivers to get the
> > toolstack to try to negotiate with the guest during save, but not
> > enough (or not working enough) drivers to actually complete the
> > negotiation.  So the toolstack times out and the migrate/save fails.
> 
> Does any of the pv-on-hvm functionality work at all in RHEL6?
> 
> Perhaps setting "platform_pci = 0" in the guest configuration would work
> around this issue? In particular if RHEL6 has no useful pv-on-hvm
> functionality in the first place then nothing is lost.
> 

RHEL6 is supposed to have working PV-on-HVM drivers,
based on Stefano's patches.

Redhat has tested them with RHEL5 dom0, afaik.

-- Pasi


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