Jesse, I will send you a replacement patch since the size of the patch is not so big. Allen -----Original Message----- From: Jesse Barnes [mailto:jbarnes@xxxxxxxxxxxxxxxx] Sent: Monday, October 05, 2009 5:14 PM To: Chris Wright Cc: Kay, Allen M; Chris Wright; linux-kernel@xxxxxxxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; matthew@xxxxxx Subject: Re: [PATCH ACS v3 1/1] On Wed, 30 Sep 2009 18:17:21 -0700 Chris Wright <chrisw@xxxxxxxxxxxx> wrote: > * 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. 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 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
