Re: [Qemu-devel] qemu live migration error from 2.0 to 2.1

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

* William Dauchy (wdauchy@gmail.com) wrote:
> On Wed, Aug 6, 2014 at 9:47 AM, Paolo Bonzini <pbonzini@redhat.com> wrote:
> > I suspect he's using "-M pc" on both.
> 
> Is it the default value? because it's not the case in my command line.
> 
> > You must use "-M pc-i440fx-2.0"
> > on both if you're migrating from 2.0 to a different version.
> 
> wow. I wasn't expecting such behavior; i.e migration between qemu
> version does not seem trivial and it removes the benefits; better
> using stop/start.
> thanks for the info.

The trick is to pick a -M value and stick with it; then you should be
able to keep migrating to newer QEMU versions easily (just don't
go with dev versions because things are often broken in them).

-M pc   is special, don't use that if you want to be able to migrate

Dave

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