Re: [Xen-devel] [PATCH for-2.4 0/3] Migration regressions with Xen.

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Thu, 30 Jul 2015, Juan Quintela wrote:
> Anthony PERARD <anthony.perard@xxxxxxxxxx> wrote:
> > This is a critical issue for Xen as migration either with the same version
> > of QEMU, or from a previous version of QEMU is broken.
> >
> > Any suggestion on how to move forward?
> 
> Will send a pull requset tomorrow.
> 
> Thinking about creating a single function that is called for all needed
> places, just to avoid this problem in the future.
> 

Hi Juan,

thanks for looking into this!
Do you have patches already we can look at and help you test to make
sure they fix the issue?

Thanks,

Stefano

> 
> >
> > On Tue, Jul 28, 2015 at 04:54:42PM +0100, Anthony PERARD wrote:
> >> Hi,
> >> 
> >> We've spotted several regression which prevent migration with Xen using the
> >> same version of QEMU or from a previous version of QEMU (tryied with 2.2).
> >> 
> >> Regression have been introduce by at least:
> >> - df4b1024526cae3479da3492d6371fd4a7324a03
> >>   migration: create new section to store global state
> >> - 61964c23e5ddd5a33f15699e45ce126f879e3e33
> >>   migration: Add configuration section
> >> 
> >> The first patch would fix the default case when we use the machine 'xenfv'.
> >> 
> >> But we can also use the machine 'pc' and I don't know how to fix this case.
> >> The second and third patches are a step in the direction of fixing
> >> migration with the machine 'pc'.
> >> 
> >> I have not look at save/restore for PV guest yet.
> >> 
> >> Thanks,
> >> 
> >> Anthony PERARD (3):
> >>   migration: Fix regretion for xenfv machine.
> >>   migration: Fix global state with Xen.
> >>   migration: Add configuration section to vmstate with xen.
> >> 
> >>  hw/i386/pc_piix.c             | 3 +++
> >>  include/migration/migration.h | 1 +
> >>  migration/migration.c         | 7 +++++++
> >>  migration/savevm.c            | 6 ++++++
> >>  4 files changed, 17 insertions(+)
> 

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