Only start in drm_sched_job_begin on first job being added to the pending list as if pending list non-empty the TDR has already been started. It is problematic to restart the TDR as it will extend TDR period for an already running job, potentially leading to dma-fence signaling for a very long period of with continous stream of jobs. Cc: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx> --- drivers/gpu/drm/scheduler/sched_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 7e90c9f95611..feeeb9dbeb86 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -540,7 +540,8 @@ static void drm_sched_job_begin(struct drm_sched_job *s_job) spin_lock(&sched->job_list_lock); list_add_tail(&s_job->list, &sched->pending_list); - drm_sched_start_timeout(sched); + if (list_is_singular(&sched->pending_list)) + drm_sched_start_timeout(sched); spin_unlock(&sched->job_list_lock); } -- 2.34.1
