Re: [Qemu-devel] [libvirt] [PATCH 4/6] qemu: Wire up disk model=virtio-{non-}transitional

[Eduardo Habkost <ehabkost@redhat.com>]

On Wed, Jan 16, 2019 at 05:24:02PM +0100, Andrea Bolognani wrote:
> On Wed, 2019-01-16 at 15:40 +0000, Daniel P. Berrangé wrote:
> > On Wed, Jan 16, 2019 at 12:45:43PM -0200, Eduardo Habkost wrote:
> > > But I don't want to create unnecessary obstacles for libvirt, so
> > > if there's a real benefit in promising compatibility between both
> > > device types, we can still promise that on the QEMU side.
> > 
> > I don't think there's an obstacle for libvirt, as I don't see any
> > compelling reason to avoid the new devices when we have QEMU >= 4.0.
> 
> Alright, let's do it that way then.
> 
> I still think it's important to maintain the relationship between
> old and new devices consistent going forward, because not doing so
> will certainly result in confusion for those using QEMU directly.

Agreed that it's a good thing to have.  I will extend the
existing virtio_version.py test case to be more strict and try to
catch mistakes that would break compatibility between the two
device types in the future.

-- 
Eduardo