Re: [Qemu-ppc] [PATCH v3 0/2] Fix migration of old pseries

[Greg Kurz]

On Thu, 18 Feb 2016 21:00:38 +0100
Laurent Vivier <address@hidden> 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 <address@hidden>
> 
> 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