This patchset does 3 main things.
Adds DEFINE_DYNAMIC_DEBUG_CATEGORIES to define bitmap => category control of pr_debugs, and to create their sysfs entries.
Uses it in amdgpu, i915 to control existing pr_debugs according to their ad-hoc categorizations.
Plugs dyndbg into drm-debug framework, in a configurable manner.
v6: cleans up per v5 feedback, and adds RFC stuff:
- test_dynamic_debug.ko: uses tracer facility added in v5:8/9 - prototype print-once & rate-limiting
Hopefully adding RFC stuff doesnt distract too much.
Jim Cromie (11): moduleparam: add data member to struct kernel_param dyndbg: add DEFINE_DYNAMIC_DEBUG_CATEGORIES and callbacks i915/gvt: remove spaces in pr_debug "gvt: core:" etc prefixes i915/gvt: use DEFINE_DYNAMIC_DEBUG_CATEGORIES to create "gvt:core:" etc categories amdgpu: use DEFINE_DYNAMIC_DEBUG_CATEGORIES to control categorized pr_debugs drm_print: add choice to use dynamic debug in drm-debug drm_print: instrument drm_debug_enabled amdgpu_ucode: reduce number of pr_debug calls nouveau: fold multiple DRM_DEBUG_DRIVERs together dyndbg: RFC add debug-trace callback, selftest with it. RFC dyndbg: RFC add print-once and print-ratelimited features. RFC.
drivers/gpu/drm/Kconfig | 13 + drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | 293 ++++++++------- .../gpu/drm/amd/display/dc/core/dc_debug.c | 44 ++- drivers/gpu/drm/drm_print.c | 49 ++- drivers/gpu/drm/i915/gvt/Makefile | 4 + drivers/gpu/drm/i915/gvt/debug.h | 18 +- drivers/gpu/drm/i915/i915_params.c | 35 ++ drivers/gpu/drm/nouveau/nouveau_drm.c | 36 +- include/drm/drm_print.h | 148 ++++++-- include/linux/dynamic_debug.h | 81 ++++- include/linux/moduleparam.h | 11 +- lib/Kconfig.debug | 11 + lib/Makefile | 1 + lib/dynamic_debug.c | 336 ++++++++++++++++-- lib/test_dynamic_debug.c | 279 +++++++++++++++ 15 files changed, 1117 insertions(+), 242 deletions(-) create mode 100644 lib/test_dynamic_debug.c