On Thu, 18 Feb 2016 21:00:38 +0100 Laurent Vivier <lviv...@redhat.com> wrote:
> On 18/02/2016 12:32, Greg Kurz wrote: > > QEMU 2.4 broke the migration of old pseries machine with the addition > > of configuration sections, which are sent unconditionally. > > > > We assume that QEMU 2.3 is more deployed than any newer release (based on > > the versions currently shipped by most distros). This v3 series hence > > reverses the logic from v2: it now fully fixes migration of old pseries > > from/to QEMU 2.3 and provides a manual workaround for the QEMU 2.4/2.4.1/2.5 > > case. > > > > With this series, I could migrate the same pseries-2.3 instance in a full > > 2.3->2.6->2.5->2.6->2.4->2.6->2.3 cycle. > > > > --- > > > > Greg Kurz (2): > > spapr: skip configuration section during migration of older machines > > migration: allow machine to enforce configuration section migration > > > > > > hw/core/machine.c | 21 +++++++++++++++++++++ > > hw/ppc/spapr.c | 1 + > > include/hw/boards.h | 1 + > > migration/savevm.c | 10 ++++++++-- > > qemu-options.hx | 3 ++- > > 5 files changed, 33 insertions(+), 3 deletions(-) > > For the series > Tested-by: Laurent Vivier <lviv...@redhat.com> > > Results of tests: > > pseries-2.3 > > qemu-2.3.0 -> qemu-master: OK > qemu-2.3.1 -> qemu-master: OK > qemu-2.4.0 -> qemu-master: OK with qom-set > qemu-2.4.1 -> qemu-master: OK with qom-set > qemu-2.5.0 -> qemu-master: OK with qom-set > qemu-master -> qemu-2.3.0: OK > qemu-master -> qemu-2.3.1: OK > qemu-master -> qemu-2.4.0: OK with qom-set > qemu-master -> qemu-2.4.1: OK with qom-set > qemu-master -> qemu-2.5.0: OK with qom-set > qemu-master -> qemu-master: OK > > pseries-2.4, pseries-2.5 and pseries-2.6 works well with the patch > applied too. > > master is "b527c9b qcow2: Write full header on image creation" + this series > > Laurent > Thanks for the reviewing and testing ! Cheers. -- Greg