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