Re: [PATCH 6/6 v3] PCI: document the change

Matthew Wilcox
2008-10-14T04:46:54Z

On Tue, Oct 14, 2008 at 12:18:40PM +0800, Dong, Eddie wrote:
> Matthew Wilcox wrote:
> > On Tue, Oct 14, 2008 at 10:14:35AM +0800, Yu Zhao wrote:
> >> As Eddie said, we have two problems here:
> >> 1) User has to set device specific parameters of a VF
> >> when he wants to use this VF with KVM (assign this
> >> device to KVM guest). In this case,
> >> VF driver is not loaded in the host environment. So
> >> operations which
> >> are implemented as driver callback (e.g.
> >> set_mac_address()) are not supported.
> >
> > I suspect what you want to do is create, then configure
> > the device in the host, then assign it to the guest.
>
> That is not true. Rememver the created VFs will be destroyed no matter
> for PF power event or error recovery conducted reset.
> So what we want is:
>
> Config, create, assign, and then deassign and destroy and then
> recreate...

Yes, but my point is this all happens in the _host_, not in the _guest_.

> Sorry can u explain a little bit more? The SR-IOV patch won't define
> what kind of entries should be created or not, we leave network
> subsystem to decide what to do. Same for disk subsstem etc.

No entries should be created. This needs to be not SR-IOV specific.

--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."