On 21.11.2016 06:31, David Gibson wrote: > Until very recently, the vmstate for ppc cpus included some poorly > thought out VMSTATE_EQUAL() components, that can easily break > migration compatibility, and did so between qemu-2.6 and later > versions. A hack was recently added which fixes this migration > breakage, but it leaves the unhelpful cruft of these fields in the > migration stream. > > dThis patch adds a new cpu property allowing these fields to be > removed from the stream entirely. This property is enabled by default > for the pseries-2.8 machine type - which comes after the fix - and for > all non-pseries machine types - which aren't mature enough to care > about cross-version migration. > > The migration hack remains in place for pseries-2.7 and earlier > machine types, allowing backwards and forwards migration with the > older machine types. > > This restricts the migration compatibility cruft to older machine > types, and at least opens the possibility of eventually deprecating > and removing it entirely.
I like that idea! Patch looks fine, too, so: Reviewed-by: Thomas Huth <th...@redhat.com>
