From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 7 Nov 2017 10:41:31 +0000
Subject: drm/selftests/mm: Insert cond_resched() between insert modes
Git-commit: 2dff0a0ce52bd4c07f3f8f843c25b6250a599361
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171107104131.5923-1-chris@chris-wilson.co.uk
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/selftests/test-drm_mm.c | 5 +++++
1 file changed, 5 insertions(+)
--- 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 cou
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 i
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();
}