Re: [PATCH ACS v3 1/1]

[Chris Wright]

* Kay, Allen M (allen.m.kay@xxxxxxxxx) 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.

thanks,
-chris
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