[PATCH] drm/selftests/mm: Insert cond_resched() between insert modes

* [PATCH] drm/selftests/mm: Insert cond_resched() between insert modes
@ 2017-11-07 10:41 Chris Wilson
  2017-11-07 12:51 ` Joonas Lahtinen
  0 siblings, 1 reply; 3+ messages in thread
From: Chris Wilson @ 2017-11-07 10:41 UTC (permalink / raw)
  To: dri-devel; +Cc: intel-gfx

kbuilder has begun running the selftests and reported a soft-lockup
inside __igt_insert(), so break up the test loop over different modes
with another call to cond_resched().

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
---
 drivers/gpu/drm/selftests/test-drm_mm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c
index 86eb4c185a28..7cc935d7b7aa 100644
--- a/drivers/gpu/drm/selftests/test-drm_mm.c
+++ b/drivers/gpu/drm/selftests/test-drm_mm.c
@@ -682,6 +682,8 @@ static int __igt_insert(unsigned int count, u64 size, bool replace)
 		drm_mm_for_each_node_safe(node, next, &mm)
 			drm_mm_remove_node(node);
 		DRM_MM_BUG_ON(!drm_mm_clean(&mm));
+
+		cond_resched();
 	}
 
 	ret = 0;
@@ -944,6 +946,8 @@ static int __igt_insert_range(unsigned int count, u64 size, u64 start, u64 end)
 		drm_mm_for_each_node_safe(node, next, &mm)
 			drm_mm_remove_node(node);
 		DRM_MM_BUG_ON(!drm_mm_clean(&mm));
+
+		cond_resched();
 	}
 
 	ret = 0;
@@ -1068,6 +1072,7 @@ static int igt_align(void *ignored)
 		drm_mm_for_each_node_safe(node, next, &mm)
 			drm_mm_remove_node(node);
 		DRM_MM_BUG_ON(!drm_mm_clean(&mm));
+
 		cond_resched();
 	}
 
-- 
2.15.0

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