Re: [libvirt] [Qemu-devel] [PATCH v4] Add machine parameter qemu-kvm-migration for live migrate compatibility with qemu-kvm
On 5 Oct 2014, at 08:00, Paolo Bonzini <pbonzini(a)redhat.com> wrote:
Il 29/09/2014 09:02, Markus Armbruster ha scritto:
>> If you were just objecting to the fact that pc-1.0 was made to
>> be an alias of either one or the other at compile time, simply
>> drop the second patch of the v2 patchset.
I was objecting to making pc-1.0 special. There's nothing special in
pc-1.0, other machine types also had differences between qemu-kvm and
qemu. And I do not think that upstream has any reason to make pc-1.0
special.
OK, so in v5, pc-1.0 is unchanged, and not made special. A new machine
type is added which allows import from something (unfortunately) called
pc-1.0 in something in qemu's past, as well as some distributions.
So, if Ubuntu is okay with breaking pc-1.0 migration from 14.04-old
to
14.04-new, the right thing to do is simply that Ubuntu makes its pc-1.0
machine type the qemu-kvm one. No new machine types, no aliases, no
anything.
That would not allow Ubuntu (or Suse - similarly affected I think)
to import pc-1.0 VMs from things actually running pc-1.0, and would
mean that newly created pc-1.0 VMs would be 'wrong', perpetuating
the problem.
--
Alex Bligh