Re: [RFC][PATCH v2 00/21] x86/pti: Defer CR3 switch to C code

Alexandre Chartre
2020-11-18T07:40:22Z

On 11/17/20 10:26 PM, Borislav Petkov wrote:
> On Tue, Nov 17, 2020 at 07:12:07PM +0100, Alexandre Chartre wrote:
>> Some benchmarks are available, in particular from phoronix:
>
> What I was expecting was benchmarks *you* have run which show that
> perf penalty, not something one can find quickly on the internet and
> something one cannot always reproduce her-/himself.
>
> You do know that presenting convincing numbers with a patchset greatly
> improves its chances of getting it upstreamed, right?
>

Well, it looks like I wrongfully assume that KPTI was a well known performance
overhead since it was introduced (because it adds extra page-table switches),
but you are right I should be presenting my own numbers.

Thanks,

alex.