Messages in this thread | | | Date | Wed, 22 Aug 2007 14:54:16 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH] Add I/O hypercalls for i386 paravirt |
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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.
Two comments:
- I should dust off my "break up paravirt_ops" patch, and this would fit nicely into it (I think we already discussed this)
- What happens if you *don't* want to pv some of the io instructions? What if you have a device which is directly exposed to the guest?
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