The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 087913e0ba2b3b9d7ccbafb2acf5dab9e35ae1d5 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024100753-refusing-absolve-0e53@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

087913e0ba2b ("drm/sched: Always increment correct scheduler score") cbc8764e29c2 ("drm/sched: Always wake up correct scheduler in drm_sched_entity_push_job") 440d52b370b0 ("drm/sched: Fix dynamic job-flow control race") f92a39ae4707 ("drm/sched: Partial revert of "Qualify drm_sched_wakeup() by drm_sched_entity_is_ready()"") a78422e9dff3 ("drm/sched: implement dynamic job-flow control") f3123c259000 ("drm/sched: Qualify drm_sched_wakeup() by drm_sched_entity_is_ready()") bc8d6a9df990 ("drm/sched: Don't disturb the entity when in RR-mode scheduling") f12af4c461fb ("drm/sched: Drop suffix from drm_sched_wakeup_if_can_queue") 35a4279d42db ("drm/sched: Rename drm_sched_run_job_queue_if_ready and clarify kerneldoc") 67dd1d8c9f65 ("drm/sched: Rename drm_sched_free_job_queue to be more descriptive") e608d9f7ac1a ("drm/sched: Move free worker re-queuing out of the if block") 7abbbe2694b3 ("drm/sched: Rename drm_sched_get_cleanup_job to be more descriptive") f7fe64ad0f22 ("drm/sched: Split free_job into own work item") a6149f039369 ("drm/sched: Convert drm scheduler to use a work queue rather than kthread") 35963cf2cd25 ("drm/sched: Add drm_sched_wqueue_* helpers") 0da611a87021 ("dma-buf: add dma_fence_timestamp helper") 56e449603f0a ("drm/sched: Convert the GPU scheduler to variable number of run-queues")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 087913e0ba2b3b9d7ccbafb2acf5dab9e35ae1d5 Mon Sep 17 00:00:00 2001 From: Tvrtko Ursulin tvrtko.ursulin@igalia.com Date: Tue, 24 Sep 2024 11:19:09 +0100 Subject: [PATCH] drm/sched: Always increment correct scheduler score MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

Entities run queue can change during drm_sched_entity_push_job() so make sure to update the score consistently.

Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@igalia.com Fixes: d41a39dda140 ("drm/scheduler: improve job distribution with multiple queues") Cc: Nirmoy Das nirmoy.das@amd.com Cc: Christian König christian.koenig@amd.com Cc: Luben Tuikov ltuikov89@gmail.com Cc: Matthew Brost matthew.brost@intel.com Cc: David Airlie airlied@gmail.com Cc: Daniel Vetter daniel@ffwll.ch Cc: dri-devel@lists.freedesktop.org Cc: stable@vger.kernel.org # v5.9+ Reviewed-by: Christian König christian.koenig@amd.com Reviewed-by: Nirmoy Das nirmoy.das@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20240924101914.2713-4-tursulin... Signed-off-by: Christian König christian.koenig@amd.com

diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c index a75eede8bf8d..b2cf3e0c1838 100644 --- a/drivers/gpu/drm/scheduler/sched_entity.c +++ b/drivers/gpu/drm/scheduler/sched_entity.c @@ -586,7 +586,6 @@ void drm_sched_entity_push_job(struct drm_sched_job *sched_job) ktime_t submit_ts;

trace_drm_sched_job(sched_job, entity); - atomic_inc(entity->rq->sched->score); WRITE_ONCE(entity->last_user, current->group_leader);

/* @@ -614,6 +613,7 @@ void drm_sched_entity_push_job(struct drm_sched_job *sched_job) rq = entity->rq; sched = rq->sched;

+ atomic_inc(sched->score); drm_sched_rq_add_entity(rq, entity); spin_unlock(&entity->rq_lock);