On Fri, Jun 08, 2018 at 11:21:48AM -0700, Jethro Beekman wrote: > On 2018-06-08 10:09, Jarkko Sakkinen wrote: > > +/* > > + * Writing the LE hash MSRs is extraordinarily expensive, e.g. > > + * 3-4x slower than normal MSRs, so we use a per-cpu cache to > > + * track the last known value of the MSRs to avoid unnecessarily > > + * writing the MSRs with the current value. Because most Linux > > + * kernels will use an LE that is signed with a non-Intel key, > > I don't think you can predict what most Linux kernels will be doing. I think > not initializing the cache to the CPU's initial value is fine, but this > particular argument shouldn't appear in the rationale. Are you just referring to the last sentence or the whole paragraph? /Jarkko
