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Re: Which new modules to include in 2.6.25 udebs



On Thu, Jun 12, 2008 at 10:20:37PM +0200, Frans Pop wrote:
> > > > I included virtio too, because, well, why not ;-)
> > >
> > > Because we're _always_ trying to save on memory usage. If something
> > > does not have a definite function in the context of the installer:
> > > don't include it.
> >
> > Well, I guess the installer could be used under KVM as well, which is
> > what the virtio drivers target (I'm pretty sure, don't use it
> > myself...). Although since kvm is fully virtualised by default I guess
> > you can install using emulated devices and switch to virtio afterwards
> > -- it'll just mean performance is worse while installing and is an
> > extra step admins have to go through.
> 
> Sounds like that is only useful if someone codes detection of a KVM 
> environment into the installer and we can somehow disable use of the 
> emulated devices and use virtio instead. Until someone steps up to do 
> that I'd suggest to leave the module out. Especially as I've recently 
> seen comments about how nice using KVM is to test installs...

I have not done any testing myself, but from what I have understood,
hosts exposes totally different devices to the system (= different PCI
IDs) when told to use virtio.

The only support needed in d-i would be to handle /dev/vd* devices, the
module itself would be loaded automatically.

I very much welcome the addition of virtio modules, even if it's in a
special module udeb, as the speed-ups should be significant when testing
installations in qemu/kvm and probably future releases of virtualbox.

Cheers,
-- 
Jérémy Bobbio

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