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Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the de
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device |
Date: |
Mon, 22 Nov 2010 16:56:16 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Mon, Nov 22, 2010 at 04:52:32PM +0200, Gleb Natapov wrote:
> On Mon, Nov 22, 2010 at 04:50:29PM +0200, Michael S. Tsirkin wrote:
> > On Mon, Nov 22, 2010 at 03:04:51PM +0200, Gleb Natapov wrote:
> > > 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.
> >
> > We've been there, weren't we? See
> > http://fedoraproject.org/wiki/Features/KVM_Stable_PCI_Addresses#KVM_Stable_PCI_Addresses
> >
> This is about stable HW configuration.
Exactly. We have the same need for nested bridges and devices behind
them.
> --
> Gleb.
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, (continued)
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device,
Michael S. Tsirkin <=
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22