drm: Track drm_mm allocators and show leaks on shutdown
We can use the kernel's stack tracer and depot to record the allocation
site of every drm_mm user. Then on shutdown, as well as warning that
allocated nodes still reside with the drm_mm range manager, we can
display who allocated them to aide tracking down the leak.
v2: Move Kconfig around so it lies underneath the DRM options submenu.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161031090806.20073-1-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 483059a..25e8e37 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -33,6 +33,19 @@
read and write values to arbitrary DPCD registers on the DP aux
channel.
+config DRM_DEBUG_MM
+ bool "Insert extra checks and debug info into the DRM range managers"
+ default n
+ depends on DRM
+ select STACKDEPOT
+ help
+ Enable allocation tracking of memory manager and leak detection on
+ shutdown.
+
+ Recommended for driver developers only.
+
+ If in doubt, say "N".
+
config DRM_KMS_HELPER
tristate
depends on DRM