Re: [Xen-devel] [RFC] Enabling live-migrate on HVM on qemu-xen device model

[Alex Bligh <alex@xxxxxxxxxxx>]

Ian,

--On 13 December 2012 11:38:31 +0000 Ian Campbell <Ian.Campbell@xxxxxxxxxx> 
wrote:

> Adding Ian J who looks after the tools portion of the stable branches.
>
> I'm personally not convinced that this change is appropriate for a
> stable branch backport, it's a pretty large feature patch after all and
> not a bug fix.
My prime concern is for our own usage, which I can easily address using
a local build.

But beyond that, my concern is that Xen-4.3 is (as advertised) going
to have qemu-xen as the default device model; no one needing HVM
can currently use it at all (if they need live migrate which I guess
most do). That's a bit of a jump.

Xen docs currently same qemu-xen is supported. Nowhere does it say
"save under HVM you can't live migrate". I'd argue lack of live migration
for HVM *is* a bug.

If you ignore the JSON stuff, the patch is quite small. We could always
only enable it as a compile option...

--
Alex Bligh

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