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Re: [Qemu-devel] [PATCHv2] piix: fix up/down races + document
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCHv2] piix: fix up/down races + document |
Date: |
Sun, 1 Apr 2012 12:06:16 +0300 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Sun, Apr 01, 2012 at 11:26:18AM +0300, Gleb Natapov wrote:
> On Sun, Apr 01, 2012 at 11:22:33AM +0300, Michael S. Tsirkin wrote:
> > > And if pci-hotplug could be done as cpu-hotplug, then it would simplify
> > > pci-hotplug
> > > (guest would only need to read PCI_BASE) and probably it would be
> > > possible to unify hotplug
> > > code for pci/cpu. But that for sure will break compatibility.
> >
> > Which isn't really acceptable.
> >
> I do not think it should be taken for granted. We should be able to get
> rid of a crud once in a while.
In general, yes. It needs to be well planned several years in
advance though. Something like
http://www.kernel.org/doc/Documentation/feature-removal-schedule.txt
might be a model.
Breaking compatibility would bring very little
gain in this case though, right?
> --
> Gleb.