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    SubjectRe: [PATCH] Add I/O hypercalls for i386 paravirt
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    On Wed, 2007-08-22 at 08:34 +0300, Avi Kivity wrote:
    > Zachary Amsden wrote:
    > > This patch provides hypercalls for the i386 port I/O instructions,
    > > which vastly helps guests which use native-style drivers. For certain
    > > VMI workloads, this provides a performance boost of up to 30%. We
    > > expect KVM and lguest to be able to achieve similar gains on I/O
    > > intensive workloads.
    >
    > Won't these workloads be better off using paravirtualized drivers?
    > i.e., do the native drivers with paravirt I/O instructions get anywhere
    > near the performance of paravirt drivers?

    This patch also means I can kill off the emulation code in
    drivers/lguest/core.c, which is a real relief.

    Cheers,
    Rusty.


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