Re: [libvirt] [Qemu-devel] [PATCH RFC] hw/pc: set q35 as the default x86 machine
Getting back to this discussion:
On Tue, Jun 05, 2018 at 09:43:00AM +0100, Daniel P. Berrangé wrote:
On Tue, Jun 05, 2018 at 09:27:46AM +0200, Gerd Hoffmann wrote:
> Hi,
>
> > > Add to that shortcuts like -cdrom
> > > stop working,
> >
> > Maybe is fixable.
>
> Already fixed for ages.
>
> > I see marking Q35 as the default machine a first step.
>
> Maybe the better option is to go the arm route: Just don't define a
> default, so users have to specify pc or q35. That will make them notice
> there is a world beside 'pc', and we also avoid breaking things
> silently.
If QEMU removes the default, then libvirt will have to hardcode
'pc' as the default to maintain back compatibility, so I don't
think that ends up as a net win
I believe there's consensus that applications blindly relying on
the default machine-type when creating a domain is a bad idea.
That said, can we deprecate this feature in libvirt, encourage
applications to always specify an explicit machine-type, thus
making it possible to deprecate the i440fx machine-types one day?
--
Eduardo