Re: [Xen-devel] ANNOUNCE: Xen 3.1.1 Second Release Candidate

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

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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