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drm/sched: Drain all entities in DRM sched run job worker

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All entities must be drained in the DRM scheduler run job worker to
avoid the following case. An entity found that is ready, no job found
ready on entity, and run job worker goes idle with other entities + jobs
ready. Draining all ready entities (i.e. loop over all ready entities)
in the run job worker ensures all job that are ready will be scheduled.

Cc: Thorsten Leemhuis <regressions@leemhuis.info>
Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Closes: https://lore.kernel.org/all/CABXGCsM2VLs489CH-vF-1539-s3in37=bwuOWtoeeE+q26zE+Q@mail.gmail.com/
Reported-and-tested-by: Mario Limonciello <mario.limonciello@amd.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3124
Link: https://lore.kernel.org/all/20240123021155.2775-1-mario.limonciello@amd.com/
Reported-and-tested-by: Vlastimil Babka <vbabka@suse.cz>
Closes: https://lore.kernel.org/dri-devel/05ddb2da-b182-4791-8ef7-82179fd159a8@amd.com/T/#m0c31d4d1b9ae9995bb880974c4f1dbaddc33a48a
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240124210811.1639040-1-matthew.brost@intel.com
This commit is contained in:
Matthew Brost 2024-01-24 13:08:11 -08:00 committed by Dave Airlie
parent 77fe8f1957
commit 66dbd9004a
1 changed files with 8 additions and 9 deletions
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17
drivers/gpu/drm/scheduler/sched_main.c
View file

@ -1178,21 +1178,20 @@ static void drm_sched_run_job_work(struct work_struct *w)
struct drm_sched_entity *entity;
struct dma_fence *fence;
struct drm_sched_fence *s_fence;
struct drm_sched_job *sched_job;
struct drm_sched_job *sched_job = NULL;
int r;
if (READ_ONCE(sched->pause_submit))
return;
entity = drm_sched_select_entity(sched);
if (!entity)
return;
sched_job = drm_sched_entity_pop_job(entity);
if (!sched_job) {
complete_all(&entity->entity_idle);
return; /* No more work */
/* Find entity with a ready job */
while (!sched_job && (entity = drm_sched_select_entity(sched))) {
sched_job = drm_sched_entity_pop_job(entity);
if (!sched_job)
complete_all(&entity->entity_idle);
}
if (!entity)
return; /* No more work */
s_fence = sched_job->s_fence;