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
