Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device

[Gleb Natapov]

On Mon, Nov 22, 2010 at 10:16:57AM +0200, Michael S. Tsirkin wrote:
> On Mon, Nov 22, 2010 at 09:37:07AM +0200, Gleb Natapov wrote:
> > > > > It's probably required to make them stable anyway.
> > > > > 
> > > > Why?
> > > 
> > > To avoid bus renumbering on reboot after you add a pci-to-pci bridge.
> > > 
> > Why should qemu care?
> 
> Stable bus numbering is a feature *users* care about, because
> some Guest OSes get confused when a card gets moved to another
> bus.
> 
So if user cares about it it should not change HW configuration of QEMU.
I guess those OSes knows how to handle hot-pluggable equipment otherwise
they will get confused on real HW too. Why QEMU should care to preserve
something in a face of configuration change?

--
                        Gleb.