Re: [PATCH 0/16 v6] PCI: Linux kernel SR-IOV support

[Greg KH]

On Sun, Nov 09, 2008 at 02:44:06PM +0200, Avi Kivity wrote:
> Greg KH wrote:
>> It's that "second" part that I'm worried about.  How is that going to
>> happen?  Do you have any patches that show this kind of "assignment"?
>>
>>   
>
> For kvm, this is in 2.6.28-rc.

Where?  I just looked and couldn't find anything, but odds are I was
looking in the wrong place :(

> Note there are two ways to assign a device to a guest:
>
> - run the VF driver in the guest: this has the advantage of best 
> performance, but requires pinning all guest memory, makes live migration a 
> tricky proposition, and ties the guest to the underlying hardware.

Is this what you would prefer for kvm?

> - run the VF driver in the host, and use virtio to connect the guest to the 
> host: allows paging the guest and allows straightforward live migration, 
> but reduces performance, and hides any features not exposed by virtio from 
> the guest.

thanks,

greg k-h
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