Re: Ryzen 4000 (Mobile) Softlocks/Micro-stutters

[Jan Beulich <jbeulich@xxxxxxxx>]

On 23.12.2020 00:04, Dylanger Daly wrote:
> I think I've narrowed down what could be the issue.
> 
> I think disabling SMT on any AMD Zen 2 CPU is breaking Xen's Credit2 
> scheduler, I can only test on AMD Ryzen 4000 based Mobile CPUs, but I think 
> this is what is causing issues with softlocks/having to pin dom0 1 vcpu.

Dario,

does this maybe ring any bells?

Jan

> I'm currently trying to re-enable SMT on Qubes 4.1 (Xen 4.14) and I'll report 
> my findings here.
>