linux-kernel - Re: [RFC] Revert "drm/sched: Split free

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Date: Wed, 24 Jan 2024 17:26:59 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Mario Limonciello <mario.limonciello@....com>,
 Luben Tuikov <ltuikov89@...il.com>, Matthew Brost <matthew.brost@...el.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
 Christian König <christian.koenig@....com>,
 "open list:DRM GPU SCHEDULER" <dri-devel@...ts.freedesktop.org>,
 open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] Revert "drm/sched: Split free_job into own work item"

On 1/23/24 03:11, Mario Limonciello wrote:
> commit f7fe64ad0f22 ("drm/sched: Split free_job into own work item")
> causes graphics hangs at GDM or right after logging in on a
> Framework 13 AMD laptop (containing a Phoenix APU).
> 
> This reverts commit f7fe64ad0f22ff034f8ebcfbd7299ee9cc9b57d7.
> 
> Fixes: f7fe64ad0f22 ("drm/sched: Split free_job into own work item")
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> ---
> This is a regression introduced in 6.8-rc1, bisected from 6.7.
> This revert done on top of 6.8-rc1 fixes the issue.

Applying this revert on 6.8-rc1 fixed my issues reported here:
https://lore.kernel.org/all/2faccc1a-7fdd-499b-aa0a-bd54f4068f3e@suse.cz/

Let me know if there's another fix instead of revert so I can test.

Thanks,
Vlastimil

> 
> I'm happy to gather any data to use to properly debug if that is
> preferable to a revert.
> ---
>  drivers/gpu/drm/scheduler/sched_main.c | 133 +++++++++----------------
>  include/drm/gpu_scheduler.h            |   4 +-
>  2 files changed, 48 insertions(+), 89 deletions(-)
>