[Spice-devel] [PATCH v4 0/2] protocol: add gl scanout support

[Christophe Fergeau]

On Thu, Jan 14, 2016 at 05:08:37PM +0100, Gerd Hoffmann wrote:
>   Hi,
> 
> > Then we realize in order to achieve X or Y, we need to do things
> > slightly differently. What is our escape plan there? Do we have an easy
> > way out without breaking older clients?
> 
> It's all guarded by the capability.  So, yes, there is a sane backup
> plan.
> 
> If we figure later we screwed up things so badly that we have to redo
> things we can use that to migrate to a better protocol extension, using
> a different capability.  We can choose whenever we want spice-server
> support both old and new extension in parallel (for smooth migration) or
> not (if that happens to not be possible for whatever reason).  Heck, we
> can even discontinue support by having spice-server not advertising the
> capability any more.
> 
> So, the only issue is that this will linger in spice-protocol forever,
> even if we stop using it in server and client at some point in the
> future.  I don't think this is a big problem.

Yup, sounds good to me too.

Christophe
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