bisected/regression: choopy youtube video on Ryzen IGP - 0ddd2ae586d2 drm/ttm: increase ttm pre-fault value to PMD size

[Christian König]

Hi Yanko,

interesting. What do you mean with "choppy"? E.g. lag on startup?

Regards,
Christian.

Am 23.07.24 um 21:42 schrieb Yanko Kaneti:
> Hello,
>
> Noticed and bisected a rawhide (with the new 6.11-rc0 snapshots) regression to this commit:
>
>    0ddd2ae586d2 drm/ttm: increase ttm pre-fault value to PMD size
>
> The regression manifests in choppy youtube video playback in google-chrome-stable.
>   https://www.youtube.com/watch?v=uOpl2XNOgMA
>   google-chrome-stable-126.0.6478.182-1.x86_64
>   VP9 video,
>   Chrome -> Override software rendering list -> on
>   Chrome -> Hardware-accelerated video decode - default enabled
>
> No other visible graphics issues.
>
> Its a desktop system with Ryzen 7 5700GRyzen 7 5700G  IGP
> [AMD/ATI] Cezanne [Radeon Vega Series / Radeon Vega Mobile Series] [1002:1638]
>
> Tested with linus tip and just reverting the commit fixes the issue.
>
> Sorry for the brevity, not sure what other details might be relevant.
>
> - Yanko
>
>