Re: [Xen-devel] Xen 4.2.1 live migration with qemu device model

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Tue, 11 Dec 2012, Alex Bligh wrote:
> Stefono, Ian,
> 
> --On 11 December 2012 15:26:25 +0000 Stefano Stabellini 
> <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> 
> > This is the patch series that needs to be backported in QEMU:
> > http://marc.info/?l=qemu-devel&m=134920288412400&w=2
> >
> > And this is the libxl counterpart:
> > http://marc.info/?l=xen-devel&m=134944750724252
> >
> > I would be OK with backporting the QEMU side,
> 
> That would be great and very useful (even if it doesn't ultimately make 4.2.x)
> 
> > but I'll leave the
> > decision on the libxl side up to you.
> 
> I'd already planned to try backporting this patchset. If it goes in 
> reasonably cleanly,
> it's probably within my competence, and I'm happy to test etc.
> 
> We need qemu-xen for the better snapshotting capability on qcow2 (rebase
> in particular), and not having live-migrate on HVM is a bit of a PITA.

It would be great if you could implement QEMU qcow2 snapshotting support
in libxl, so that everything can happen seamlessly using a variation of xl
save/restore.
It is a while that we wanted that feature but we never got around to it.

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