On (Tue) 15 Feb 2011 [17:13:13], Anthony Liguori wrote: > On 02/15/2011 10:26 AM, Chris Wright wrote: > > > >revisit new -> old migration > >- Amit offers virtio-serial patches and some legwork > > So, to me, migration correctness trumps compatibility. I don't > think compatibility is useful if it means that a guest may fail > during migration. We have subsections as a way to support the cases > where it's safe to migrate to an old version only if a feature is > not being used or a corner case is not currently happening. This is > the best way to approach the problem. > > If a subsection won't work, that means you want to migrate when > you're completely sure that migrating will break a guest. That > doesn't seem reasonable at all to me. > > I think in the last discussion on Amit's patches, I had suggested > that subsections could be used to allow migration when there wasn't > any queued data. I think this is the best we can do while > preserving correctness. The only problem is that virtio hasn't been converted over to vmstate, which is necessary for subsections. Amit -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
