Am 08.08.2018 um 12:55 schrieb Nayan Deshmukh:
Hi Christian,
On Wed, Aug 8, 2018 at 4:20 PM Christian König
<[email protected]
<mailto:[email protected]>> wrote:
Ping, Nayan any comments on that or can I commit it?
This is just a stripped down version of my original last_scheduled
improvement patch.
I had missed the mail yesterday. I was just looking at the code right
now. The code looks fine but I wanted to run it once before giving it
a Rb.
I was wondering why you stripped it down. Was there some problem with
the previous one?
No, not really. But this is a bug fix and bug fixes should be as simple
as possible.
Improvements should come in separate patches. Didn't thought initially
that this is actually a fix.
BTW: Another small fix is required, looks like we need the scheduler
correctly set for debugging even earlier.
Christian.
Cheers,
Nayan
Christian.
Am 07.08.2018 um 14:54 schrieb Christian König:
> Make sure we access last_scheduled only after checking that
there are no
> more jobs on the entity.
>
> Signed-off-by: Christian König <[email protected]
<mailto:[email protected]>>
> ---
> drivers/gpu/drm/scheduler/gpu_scheduler.c | 21
+++++++++++----------
> 1 file changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/scheduler/gpu_scheduler.c
b/drivers/gpu/drm/scheduler/gpu_scheduler.c
> index 8ee249886473..bd7883d1b964 100644
> --- a/drivers/gpu/drm/scheduler/gpu_scheduler.c
> +++ b/drivers/gpu/drm/scheduler/gpu_scheduler.c
> @@ -568,19 +568,20 @@ void drm_sched_entity_push_job(struct
drm_sched_job *sched_job,
> struct drm_sched_entity *entity)
> {
> struct drm_sched_rq *rq = entity->rq;
> - bool first, reschedule, idle;
> + bool first;
>
> - idle = entity->last_scheduled == NULL ||
> - dma_fence_is_signaled(entity->last_scheduled);
> first = spsc_queue_count(&entity->job_queue) == 0;
> - reschedule = idle && first && (entity->num_rq_list > 1);
> + if (first && (entity->num_rq_list > 1)) {
> + struct dma_fence *fence;
>
> - if (reschedule) {
> - rq = drm_sched_entity_get_free_sched(entity);
> - spin_lock(&entity->rq_lock);
> - drm_sched_rq_remove_entity(entity->rq, entity);
> - entity->rq = rq;
> - spin_unlock(&entity->rq_lock);
> + fence = READ_ONCE(entity->last_scheduled);
> + if (fence == NULL || dma_fence_is_signaled(fence)) {
> + rq = drm_sched_entity_get_free_sched(entity);
> + spin_lock(&entity->rq_lock);
> + drm_sched_rq_remove_entity(entity->rq, entity);
> + entity->rq = rq;
> + spin_unlock(&entity->rq_lock);
> + }
> }
>
> sched_job->sched = entity->rq->sched;
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