Quoting Chris Wilson (2018-03-16 20:53:01)
> +static void preempt_reset(struct work_struct *work)
> +{
> + struct intel_engine_cs *engine =
> + container_of(work, typeof(*engine), execlists.preempt_reset);
> +
So thinking about the races you had in the reset, you need
tasklet_kill()
tasklet_disable();
> + if (execlists_is_active(&engine->execlists, EXECLISTS_ACTIVE_PREEMPT))
> + i915_handle_error(engine->i915, BIT(engine->id), 0,
> + "preemption timed out on %s", engine->name);
tasklet_enable();
here for the serialisation on EXECLISTS_ACTIVE_PREEMPT.
-Chris
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