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> If the idea is to gate with nova-extra-drivers this could lead to a
> rather painful process to change the virt driver API. When all the
> drivers are in the same tree all of them can be updated at the same
> time as the infrastructure. 

Right, and I think if we split those drivers out, then we do *not* gate
on them for the main tree. It's asymmetric, which means potentially more
trouble for the maintainers of the extra drivers. However, as has been
said, we *want* the drivers in the tree as we have them now. Being moved
out would be something the owners of a driver would choose in order to
achieve a faster pace of development, with the consequence of having to
place catch-up if and when we change the driver API.

Like I said, I'll be glad to submit patches to the extra tree in unison
with patches to the main tree to make some of the virt API changes that
will be coming soon, which should minimize the troubles.

I believe Alex has already said that he'd prefer the occasional catch-up
activities over what he's currently experiencing.

--Dan