Re: [PATCH 13/18] ntdll: Use syscall frame for YMM context in x86_64 NtGetContextThread.

[Stefan Dösinger]

Am Samstag, 23. Jänner 2021, 14:40:08 EAT schrieb Jacek Caban:
> On 22/01/2021 17:21, Paul Gofman wrote:
> > I think we still support processors which don't have AVX and thus don't
> > have xsave instruction (which is reported as a separate cpuid bit).
>
> Looking closer at this, we indeed need a feature check here. I will work
> on a new version (patches 1-11 in the series should not be affected).

I am curious if you have tested the performance impact of this. While I agree 
that this chance is the right thing to do it would be nice to know the 
downsides.