linux-kernel - Re: AMD graphics performance regression in 4.15 and later

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Date:   Wed, 11 Apr 2018 07:02:40 +0200
From:   Gabriel C <nix.or.die@...il.com>
To:     christian.koenig@....com
Cc:     Jean-Marc Valin <jmvalin@...illa.com>,
        Dave Airlie <airlied@...ux.ie>, alexander.deucher@....com,
        Felix.Kuehling@....com, Laura Abbott <labbott@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        michel.daenzer@....com, dri-devel@...ts.freedesktop.org,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: AMD graphics performance regression in 4.15 and later

>2018-04-11 6:00 GMT+02:00 Gabriel C <nix.or.die@...il.com>:
> 2018-04-09 11:42 GMT+02:00 Christian König <ckoenig.leichtzumerken@...il.com>:
>> Am 07.04.2018 um 00:00 schrieb Jean-Marc Valin:
...
> I can help testing code for 4.17/++ if you wish but that is *different* storry.
>

Quick tested an 4.16.0-11490-gb284d4d5a678 , amdgpu and radeon driver
are broken now in this one.

radeon tells:

...

[    6.337838] [drm] PCIE GART of 2048M enabled (table at 0x00000000001D6000).
[    6.338210] radeon 0000:21:00.0: (-12) create WB bo failed
[    6.338214] radeon 0000:21:00.0: disabling GPU acceleration

...

And no way to start X .. flickering and hangs.

amdgpu hits an bug:

http://ftp.frugalware.org/pub/other/people/crazy/trace.txt


Do you have some git tree I can test from ?

Also if you need full , logs or any other infos just  let me know.

Regards