Xen devel - Sep 2007 - ANNOUNCE: Xen 3.1.1 Second Release Candidate

Folks,

The second release candidate for 3.1.1 is now tagged and available from
http://xenbits.xensource.com/xen-3.1-testing.hg. Hopefully we can call the
final release next week, so please test!

 -- Keir



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On Thu, Sep 27, 2007 at 05:38:09PM +0100, Keir Fraser
wrote:
> Folks,
> 
> The second release candidate for 3.1.1 is now tagged and available from
> http://xenbits.xensource.com/xen-3.1-testing.hg. Hopefully we can call the
> final release next week, so please test!
Is the 3.1.1 release intended to be hypervisor ABI compatible with the 
3.1.0  release ? ie can I expect the 3.1.1 userspace bits to work reliably
on a 3.1.0 hypervisor, or vica-verca.

A quick test shows I can start XenD & launch guests with a 3.1.1 XenD
on a 3.1.0 hypervisor. I''m wondering if this is just luck that will
soon
fail me, or a intended result ?

If hypervisor ABI compatability for minor point releases is intended this
would make me very happy because it removes a huge upgrade headache. We
have traditionally not been able to push out the Xen minor point releases
as update errata to Fedora distros because of the need to lock-step upgrade
the hypervisor at the same time as the userspace. 

Regards,
Dan.
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On 27/9/07 17:56, "Daniel P. Berrange" <berrange@redhat.com>
wrote:
> Is the 3.1.1 release intended to be hypervisor ABI compatible with the
> 3.1.0  release ? ie can I expect the 3.1.1 userspace bits to work reliably
> on a 3.1.0 hypervisor, or vica-verca.
> 
> A quick test shows I can start XenD & launch guests with a 3.1.1 XenD
> on a 3.1.0 hypervisor. I''m wondering if this is just luck that
will soon
> fail me, or a intended result ?
> 
> If hypervisor ABI compatability for minor point releases is intended this
> would make me very happy because it removes a huge upgrade headache. We
> have traditionally not been able to push out the Xen minor point releases
> as update errata to Fedora distros because of the need to lock-step upgrade
> the hypervisor at the same time as the userspace.
I can happily tell you that the tools ABI is stable for minor point
releases. At least, that is our intention (we don''t automatically test
it).

By the way, I guess I''ll push your xend patches into -rc3 if they seem
well
behaved in -unstable after a few days.

 -- Keir



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