[PATCH 5/5] drm/i915/execlists: Hesitate before slicing

[Chris Wilson]

Be a little more hesitant before injecting a timeslice, and try to take
into account any change in priority that is due for the running task
before switching to another task. This will allow us to arbitrarily
prevent switching away from a request if we deem it necessarily to
disable preemption, for instance.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 953b3938a85f..1e85e04c58c4 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -899,7 +899,7 @@ need_timeslice(struct intel_engine_cs *engine, const struct i915_request *rq)
 	hint = max(rq_prio(list_next_entry(rq, sched.link)),
 		   engine->execlists.queue_priority_hint);
 
-	return hint >= rq_prio(rq);
+	return hint >= effective_prio(rq);
 }
 
 static bool
-- 
2.20.1