Re: [libvirt] [Qemu-devel] [PATCH] [RFC] Add machine type pc-1.0-qemu-kvm for live migrate compatibility with qemu-kvm
Quoting Alex Bligh (alex(a)alex.org.uk):
On 22 Jul 2014, at 19:43, Alex Bligh <alex(a)alex.org.uk> wrote:
> Testing has been light to date (i.e.
> can I migrate it inbound with -S without anything complaining).
thanks, Alex!
I've given this quite a bit more testing today.
It works fine qemu-kvm 1.0 -> qemu-2.0+patch (cirrus vga)
It works fine qemu-2.0+patch -> qemu-2.0+patch (cirrus vga)
It doesn't (yet) work qemu-2.0+patch -> qemu-kvm 1.0 (cirrus vga).
The reason for this is (at least) that I need to emulate the
broken versioning of the mc146818rtc timer section, as writing
it correctly confuses qemu-kvm 1.0. Therefore please don't bother
testing migration back to 1.0 yet.
I don't think that is in any way a problem. Is migrating to older
versions ever actually expected to work? In either case I don't
think for this particular case it's a problem.
(The "how to handle this in libvirt" question is more interesting)
-serge