Messages in this thread | | | Date | Mon, 5 Oct 2009 17:14:19 -0700 | From | Jesse Barnes <> | Subject | Re: [PATCH ACS v3 1/1] |
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On Wed, 30 Sep 2009 18:17:21 -0700 Chris Wright <chrisw@sous-sol.org> wrote:
> * Kay, Allen M (allen.m.kay@intel.com) wrote: > > On the other hand, can we say VT-d PT mode is mainly for KVM > > virtualization use case? If so, is it reasonable to say > > performance of host P2P in this mode is not of highest priority? > > Guess it depends on the workload. Would be helpful to identify a use > case that is p2p heavy (and then the impact of enabling ACS). > > > If not, another option is to have a kernel boot parameter to > > configure an kernel boot instance to be either host kernel > > optimized or virtualization optimized. I don't know whether this > > is a reasonable or not ... > > I was thinking that ACS could be enabled if an IOMMU is enabled. Not > a perfect fit, but seems reasonably close.
Allen, did you want to do these changes as an incremental patch on your last one or just send me a replacement? Either way is fine with me.
-- Jesse Barnes, Intel Open Source Technology Center
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