On Mon, 30 Sep 2019 11:17:45 +0200 Neil Armstrong wrote:
>
> Did a new run from 5.3:
>
> [ 35.971972] Call trace:
> [ 35.974391] drm_sched_increase_karma+0x5c/0xf0
> ffff000010667f38 FFFF000010667F94
> drivers/gpu/drm/scheduler/sched_main.c:335
>
> The crashing line is :
> if (bad->s_fence->scheduled.context ==
> entity->fence_context) {
>
> Doesn't seem related to guilty job.
Bail out if s_fence is no longer fresh.
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -333,6 +333,10 @@ void drm_sched_increase_karma(struct drm
spin_lock(&rq->lock);
list_for_each_entry_safe(entity, tmp, &rq->entities, list) {
+ if (!smp_load_acquire(&bad->s_fence)) {
+ spin_unlock(&rq->lock);
+ return;
+ }
if (bad->s_fence->scheduled.context ==
entity->fence_context) {
if (atomic_read(&bad->karma) >
@@ -543,7 +547,7 @@ EXPORT_SYMBOL(drm_sched_job_init);
void drm_sched_job_cleanup(struct drm_sched_job *job)
{
dma_fence_put(&job->s_fence->finished);
- job->s_fence = NULL;
+ smp_store_release(&job->s_fence, 0);
}
EXPORT_SYMBOL(drm_sched_job_cleanup);
--
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