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    SubjectRe: [PATCH RFC 1/5] vringfd syscall
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    Hey, Rusty,

    > For virtualization, we've developed virtio_ring for efficient communication.
    > This would also work well for userspace-kernel communication, particularly
    > for things like the tun device. By using the same ABI, we can join guests
    > to the host kernel trivially.

    I'm *sure* you meant to document that somewhat non-trivial proposed new
    kernel API as soon as you got a moment. But, since I went to the
    trouble of reverse engineering it, I decided not to wait and to make a
    little unreliable guide of my own. For those who are curious about how
    vringfd() is meant to work (or about how badly I misunderstood it), the
    info is at:

    http://lwn.net/SubscriberLink/276856/8c927025c53ad7ce/

    Hopefully it will be helpful,

    jon


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