Lag after resume culprit found

[Pete Wright]

On 05/16/2018 16:07, Johannes Lundberg wrote:
> https://github.com/freebsd/freebsd/commit/66f063557f257baa9c8aeab9f933171eaa6e1cfa
> x86 cpususpend_handler: call wbinvd after setting suspend state bits
>
> How to test (i915kms)
>
> Start X with glxgears
> Confirm running stable at 60 fps
> suspend/resume (S3)
> glxgears is now fluctuating between 10-40 fps.
>
>
> Way past bedtime now so I stop here for today.

i can confirm that the commit avg@ put in to HEAD today to revert this 
solved my suspend/resume issues on my Kabylake system running drm-next.  
Thanks for tracking this down Johannes, and the quick attention from 
Andriy to fix this!

cheers,
-pete

-- 
Pete Wright
pete at nomadlogic.org
@nomadlogicLA