[libvirt] [PATCH] qemu: ensure default machine types don't change if QEMU changes

[Daniel P. Berrangé]

On Tue, Aug 07, 2018 at 03:54:06PM +0200, Andrea Bolognani wrote:
> On Tue, 2018-08-07 at 13:22 +0100, Daniel P. Berrangé wrote:

> [...]
> > +     * Our preferred pmachine might have been compiled out of
> 
> s/pmachine/machine/
> 
> > +     * QEMU at build time though, so we still fallback to honouring
> > +     * QEMU's reported default in that case
> > +     */
> > +    if (preferredIdx == -1)
> > +        preferredIdx = defIdx;
> > +    if (preferredIdx != -1)
> > +        virQEMUCapsSetDefaultMachine(qemuCaps, preferredIdx);
> 
> This is certainly an improvement compared to the current situation,
> so
> 
>   Reviewed-by: Andrea Bolognani <abologna at redhat.com>
> 
> I wonder if we shouldn't just drop the default machine type handling
> altogether at this point, though.

That's impossible as it violates the back compatibility guarantee
and will certainly break applications


Regards,
Daniel
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