On 2018-06-19 07:08, Jarkko Sakkinen wrote:
> 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?

Just the last sentence.

> /Jarkko
Jethro