[PATCH] drm/sched: Always trace the dependencies we wait on, to fix a race.

[Christian König]

Am 08.02.19 um 00:10 schrieb Eric Anholt:
> "Koenig, Christian" <Christian.Koenig at amd.com> writes:
>
>> Am 07.12.18 um 20:16 schrieb Eric Anholt:
>>> The entity->dependency can go away completely once we've called
>>> drm_sched_entity_add_dependency_cb() (if the cb is called before we
>>> get around to tracing).  The tracepoint is more useful if we trace
>>> every dependency instead of just ones that get callbacks installed,
>>> anyway, so just do that.
>>>
>>> Fixes any easy-to-produce OOPS when tracing the scheduler on V3D with
>>> "perf record -a -e gpu_scheduler:.\* glxgears" and DEBUG_SLAB enabled.
>>>
>>> Signed-off-by: Eric Anholt <eric at anholt.net>
>> Reviewed-by: Christian König <christian.koenig at amd.com>
>>
>> Going to pick that up for upstream and will add with a CC: stable.
> Looks like this got misplaced.

My fault, pushed to our internal branch now with a CC: stable tag on it.

Christian.

>
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