linux-kernel - Re: regression/bisected/6.8 commit f7fe64ad0f22ff034f8ebcfbd7299ee9cc9b57d7 leads to GPU hang when I open GNOME activities

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Date: Wed, 24 Jan 2024 09:43:09 -0600
From: Mario Limonciello <mario.limonciello@....com>
To: Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>, matthew.brost@...el.com,
 ltuikov89@...il.com, Alex Deucher <alexdeucher@...il.com>,
 Christian König <ckoenig.leichtzumerken@...il.com>,
 dri-devel <dri-devel@...ts.freedesktop.org>,
 amd-gfx list <amd-gfx@...ts.freedesktop.org>,
 Linux List Kernel Mailing <linux-kernel@...r.kernel.org>
Subject: Re: regression/bisected/6.8 commit
 f7fe64ad0f22ff034f8ebcfbd7299ee9cc9b57d7 leads to GPU hang when I open GNOME
 activities

On 1/24/2024 08:37, Mikhail Gavrilov wrote:
> On Wed, Jan 24, 2024 at 7:19 AM Mikhail Gavrilov
> <mikhail.v.gavrilov@...il.com> wrote:
>>
>> Who could dig into it, please?
> 
> You decided to revert it?
> https://lkml.org/lkml/2024/1/22/1866

It's not a straight "git revert" on 6.8-rc1 because of some other 
contextual changes.

I posted that as an RFC specifically "in case" that's the direction we 
go and don't get a proper solution together.

Matthew also posted a debugging patch here for use with ftrace and the 
GPU scheduler events: https://gitlab.freedesktop.org/drm/amd/-/issues/3124

I reproduced it with that as well and posted my ftrace results.

> 
> Also I forgot to attach the kernel build .config in the previous
> message. I'm going to fix it here.
> It may be useful for reproducing my bug script.
>