[PATCH] drm/i915/selftests: Drain the freedlists between exec passes

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During the context execution tests, we issue a lot of work and discard a
lot of objects without releasing the lock and allowing the background
reaper to free those objects. Insert a small break between each pass to
flush the worker.

Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index a23c6df9b9f4..91d13f019265 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -562,6 +562,8 @@ static int igt_ctx_exec(void *arg)
 		mock_file_free(i915, file);
 		if (err)
 			return err;
+
+		i915_gem_drain_freed_objects(i915);
 	}
 
 	return 0;
@@ -672,6 +674,10 @@ static int igt_shared_ctx_exec(void *arg)
 
 			dw += rem;
 		}
+
+		mutex_unlock(&i915->drm.struct_mutex);
+		i915_gem_drain_freed_objects(i915);
+		mutex_lock(&i915->drm.struct_mutex);
 	}
 out_test:
 	if (igt_live_test_end(&t))
-- 
2.20.1

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