Re: [Qemu-devel] migration from qemu2.1.2 to qemu2.2

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* William Dauchy (william@gandi.net) wrote:
> Hi David,
> 
> Thank you for the quick answer.
> 
> On Dec09 18:55, Dr. David Alan Gilbert wrote:
> > You don't tell us what that command line is!
> > If you're using -M pc or -M q35  that's expected; if you're not
> > it's probably a bug - please show us the command line.
> 
> sorry it's indeed with `-M pc`. So I misunderstood the usage of
> supported machines option since I was looking for a way to upgrade the
> version and avoiding being stuck on a specific release.
> I now understand I am supposed to keep the same version between live
> migration and wait for a complete stop/start to upgrade. Or if there is
> a trick, please advice.

Yes, you've got to keep the same machine type to do a live migration;
think of it like keeping the same motherboard/cpu combination in a real
machine - we can't squash the state from one shape machine into
a different shape machine without the guest getting very confused.

Dave
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK