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    SubjectRE: [RFC PATCH v8 00/16] Provide a zero-copy method on KVM virtio-net.
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    Hello Xiaohui,

    On Fri, 2010-07-30 at 16:53 +0800, Xin, Xiaohui wrote:
    > >Since vhost-net already supports macvtap/tun backends, do you think
    > >whether it's better to implement zero copy in macvtap/tun than
    > inducing
    > >a new media passthrough device here?
    > >
    >
    > I'm not sure if there will be more duplicated code in the kernel.

    I think it should be less duplicated code in the kernel if we use
    macvtap to support what media passthrough driver here. Since macvtap has
    support virtio_net head and offloading already, the only missing func is
    zero copy. Also QEMU supports macvtap, we just need add a zero copy flag
    in option.

    Thanks
    Shirley



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