On 1/24/24 22:08, Matthew Brost wrote: > 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@xxxxxxxxxxxxx> > Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@xxxxxxxxx> > Closes: https://lore.kernel.org/all/CABXGCsM2VLs489CH-vF-1539-s3in37=bwuOWtoeeE+q26zE+Q@xxxxxxxxxxxxxx/ > Reported-and-tested-by: Mario Limonciello <mario.limonciello@xxxxxxx> > Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3124 > Link: https://lore.kernel.org/all/20240123021155.2775-1-mario.limonciello@xxxxxxx/ > Reported-by: Vlastimil Babka <vbabka@xxxxxxx> Can change to Reported-and-tested-by: Vlastimil Babka <vbabka@xxxxxxx> Thanks! > Closes: https://lore.kernel.org/dri-devel/05ddb2da-b182-4791-8ef7-82179fd159a8@xxxxxxx/T/#m0c31d4d1b9ae9995bb880974c4f1dbaddc33a48a > Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx> > --- > drivers/gpu/drm/scheduler/sched_main.c | 15 +++++++-------- > 1 file changed, 7 insertions(+), 8 deletions(-) > > diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c > index 550492a7a031..85f082396d42 100644 > --- a/drivers/gpu/drm/scheduler/sched_main.c > +++ b/drivers/gpu/drm/scheduler/sched_main.c > @@ -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); > + /* 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; > - > - sched_job = drm_sched_entity_pop_job(entity); > - if (!sched_job) { > - complete_all(&entity->entity_idle); > return; /* No more work */ > - } > > s_fence = sched_job->s_fence; >
