From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anthony Liguori <anthony@codemonkey.ws>
Subject: Re: [Qemu-devel] live migration between qemu-kvm 1.0 and 0.15
Date: Tue, 27 Mar 2012 11:49:47 -0500
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Cc: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>,
	Jan Kiszka <jan.kiszka@siemens.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	Juan Quintela <quintela@redhat.com>
To: Avi Kivity <avi@redhat.com>
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On 03/27/2012 11:46 AM, Avi Kivity wrote:
> On 03/27/2012 06:39 PM, Anthony Liguori wrote:
>>
>> So, since we're approaching 1.1, we should really discuss release
>> criteria for 1.1 with respect to live migration.  I'd prefer to avoid
>> surprises in this release.
>
> Agree strongly.
>
>>
>> My expectation is that migration works from:
>>
>> qemu-1.0 -M 1.0     =>     qemu-1.1 -M 1.1
>
> Why do you expect that?  Maybe you meant -M 1.0 at the end?

Sorry, I did mean -M 1.0.

>
>> qemu-1.1 -M 1.0<=    qemu-1.1 -M 1.0
>>
>> I would expect that migration works from:
>>
>> qemu-0.15 -M 0.15   =>    qemu-1.1 -M 0.15
>>
>
> Ack.
>
>> I'm okay if this fails gracefully:
>>
>> qemu-1.1 -M 0.15<=   qemu-0.15 -M 0.15
>
> RHEL has more stringent requirements (going back to its heavily patched
> 0.12).  I think we should have the infrastructure that allow one to add
> the hacks to make this work, even if we don't actually do the compat
> work for the release (I think it's fine for qemu to support just one
> version going back; and unreasonable to require it to go as far back as
> RHEL).

This is reasonable to me.

Regards,

Anthony Liguori

>