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

[Igor Mammedov <imammedo@redhat.com>]

On Sun, 10 May 2020 17:42:16 +0000
Ani Sinha <ani.sinha@nutanix.com> wrote:

> > On Apr 29, 2020, at 9:02 PM, Igor Mammedov <imammedo@redhat.com> wrote:
> > 
> > On Fri, 24 Apr 2020 14:44:48 -0400
> > Eduardo Habkost <ehabkost@redhat.com> wrote:
> >   
> >> 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?  
> > 
> > I put this patch on my review queue (hopefully next week I'd be able to get to it)  
> 
> Any progress?
> 

see my reply on v2