Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses

[Eduardo Habkost <ehabkost@redhat.com>]

On Fri, Apr 24, 2020 at 03:23:56PM +0000, Ani Sinha wrote:
> 
> 
> > On Apr 22, 2020, at 4:15 PM, Ani Sinha <ani.sinha@nutanix.com> wrote:
> > 
> > 
> > 
> >> On Apr 21, 2020, at 8:32 PM, Daniel P. Berrangé <berrange@redhat.com> wrote:
> >> 
> >> On Tue, Apr 21, 2020 at 02:45:04PM +0000, Ani Sinha wrote:
> >>> 
> >>> 
> >>>> On Apr 20, 2020, at 8:32 PM, Michael S. Tsirkin <mst@redhat.com> wrote:
> >>>> 
> >>>> But I for one would like to focus on keeping PIIX stable
> >>>> and focus development on q35.  Not bloating PIIX with lots of new
> >>>> features is IMHO a good way to do that.
> >>> 
> >>> Does this mean this patch is a no-go then? :(
> >> 
> >> I'd support this patch, as I don't think it can really be described as
> >> bloat or destabalizing. It is just adding a simple property to
> >> conditionalize existing functionality.  Telling people to switch to Q35
> >> is unreasonable as it is not a simple 1-1 conversion from existing use
> >> of PIIX. Q35 has much higher complexity in its configuration, has higher
> >> memory overhead per VM too, and lacks certain features of PIIX too.
> > 
> > Cool. How do we go forward from here?
> > 
> 
> We would really appreciate if we can add this extra knob in
> Qemu. Maybe someone else also in the community will find this
> useful. We don’t want to maintain this patch internally forever
> but rather prefer we maintain this as a Qemu community.

Michael, I agree with Daniel here and I don't think we should
start refusing PIIX features if they are useful for a portion of
the QEMU community.

Would you reconsider and merge this patch?

-- 
Eduardo