Re: [kvm-devel] [PATCH 0/15] KVM userspace interface updates

From: Heiko Carstens
Date: Mon Mar 19 2007 - 12:40:06 EST


On Mon, Mar 19, 2007 at 06:02:57PM +0200, Avi Kivity wrote:
> Heiko Carstens wrote:
> I agree with all of the above, and in addition, integration to the
> scheduler will allow us to reduce vcpu migration rate, and maybe do
> things like gang scheduling.
>
> But that doesn't mean it can be done now: we really need to see how it
> works out with smp and with an additional arch, and then we can stabilize
> it. Meanwhile I'd like a stable ABI so distros can start shipping
> kvm without worrying about upgrade headaches.
>
> So the plan is:
> - get the /dev/kvm ABI into 2.6.22
> - implement smp
> - add another arch
> - move to a syscall based interface in parallel; userspace should work with both
> - deprecate the old ABI and external modules.

I wasn't asking to change the ABI right now, just wanted to make sure that
it is not the 'final' interface. So I agree with your plan.
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