On Mon, 8 Aug 2022 at 18:57, BB <shen...@gmail.com> wrote: > Am 8. August 2022 14:15:40 MESZ schrieb Igor Mammedov <imamm...@redhat.com>: > >On Wed, 3 Aug 2022 19:26:30 +0200 > >While refactoring we should keep migration stream compatible with older > >QEMU versions (we must not regress widely x86 code path). Which might be > >tricky in this case. > > Does this particular fix make future compatibility harder or easier or is it > that hard already? IIUC it omits the hotplug bits in the vm state for Malta > which is what one would expect there, right?
This patch's fix only affects Malta. It is (I suspect but have not tested) a migration compat break on Malta, but we don't care about cross-version migration compat for that board anyway. Migration compat matters (to a first approximation) only for those boards which have versioned machine types (eg pc-7.0, pc-7.1, etc). For all other machine types we retain compat only if it's easy. thanks -- PMM
