diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-01-14 14:21:09 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-01-14 16:17:50 +0000 |
| commit | bd780f37a3617d3dda74b97013ae8aa9b07a1d91 (patch) | |
| tree | 9034d70695f3d72af826142696ad48287b7e7a55 /drivers/gpu/drm/i915/Kconfig.debug | |
| parent | 74256b7ecf7790de78ea14facfc9dac02afcc76a (diff) | |
drm/i915: Track all held rpm wakerefs
Everytime we take a wakeref, record the stack trace of where it was
taken; clearing the set if we ever drop back to no owners. For debugging
a rpm leak, we can look at all the current wakerefs and check if they
have a matching rpm_put.
v2: Use skip=0 for unwinding the stack as it appears our noinline
function doesn't appear on the stack (nor does save_stack_trace itself!)
v3: Allow rpm->debug_count to disappear between inspections and so
avoid calling krealloc(0) as that may return a ZERO_PTR not NULL! (Mika)
v4: Show who last acquire/released the runtime pm
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Tested-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190114142129.24398-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/Kconfig.debug')
| -rw-r--r-- | drivers/gpu/drm/i915/Kconfig.debug | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug index 9e36ffb5eb7c..ad4d71161dda 100644 --- a/drivers/gpu/drm/i915/Kconfig.debug +++ b/drivers/gpu/drm/i915/Kconfig.debug @@ -21,11 +21,11 @@ config DRM_I915_DEBUG select DEBUG_FS select PREEMPT_COUNT select I2C_CHARDEV + select STACKDEPOT select DRM_DP_AUX_CHARDEV select X86_MSR # used by igt/pm_rpm select DRM_VGEM # used by igt/prime_vgem (dmabuf interop checks) select DRM_DEBUG_MM if DRM=y - select STACKDEPOT if DRM=y # for DRM_DEBUG_MM select DRM_DEBUG_SELFTEST select SW_SYNC # signaling validation framework (igt/syncobj*) select DRM_I915_SW_FENCE_DEBUG_OBJECTS @@ -173,6 +173,7 @@ config DRM_I915_DEBUG_RUNTIME_PM bool "Enable extra state checking for runtime PM" depends on DRM_I915 default n + select STACKDEPOT help Choose this option to turn on extra state checking for the runtime PM functionality. This may introduce overhead during |