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* [PATCH v5 00/30] Fix DYNAMIC_DEBUG classmaps for DRM
@ 2025-10-09 17:58 Jim Cromie
  2025-10-09 17:58 ` [PATCH v5 01/30] docs/dyndbg: update examples \012 to \n Jim Cromie
                   ` (31 more replies)
  0 siblings, 32 replies; 33+ messages in thread
From: Jim Cromie @ 2025-10-09 17:58 UTC (permalink / raw)
  To: jbaron
  Cc: gregkh, ukaszb, louis.chauvet, linux-kernel, dri-devel, amd-gfx,
	intel-gvt-dev, intel-gfx, daniel.vetter, tvrtko.ursulin,
	jani.nikula, ville.syrjala, Jim Cromie, andrewjballance

DYNAMIC_DEBUG classmaps is BROKEN for its 1st user: DRM. Lets Fix it.

The DECLARE_DYNDBG_CLASSMAP macro muddled the distinction between
definition and reference; in use it failed K&R define once, refer many.

Replace it with:
. DYNAMIC_DEBUG_CLASSMAP_DEFINE		for drm.ko
. DYNAMIC_DEBUG_CLASSMAP_USE		for drivers etc

Enhance test-dynamic-debug{,-submod}.ko to recapitulate DRM's 2+ module
boss-workers failure scenario, and to selftest against them.  This allows
dropping the DRM patches, formerly included to prove functionality.

The latest (unversioned) rev:
. I inexplicably fiddled with the patch subject
. dropped DRM as OT for lib/
https://lore.kernel.org/lkml/20250911213823.374806-1-jim.cromie@gmail.com/

v1-4 saw significant review, thanks Louis Chauvet <louis.chauvet@bootlin.com>

v4: https://lore.kernel.org/lkml/20250803035816.603405-1-jim.cromie@gmail.com/
v3: https://lore.kernel.org/lkml/20250402174156.1246171-1-jim.cromie@gmail.com/#t
v2: https://lore.kernel.org/lkml/20250320185238.447458-1-jim.cromie@gmail.com/
v1: https://lore.kernel.org/lkml/20250125064619.8305-1-jim.cromie@gmail.com/
v0: prehistoric versions are linked from v1,v2

Jim Cromie (30):
  docs/dyndbg: update examples \012 to \n
  docs/dyndbg: explain flags parse 1st
  test-dyndbg: fixup CLASSMAP usage error
  dyndbg: reword "class unknown," to "class:_UNKNOWN_"
  dyndbg: make ddebug_class_param union members same size
  dyndbg: drop NUM_TYPE_ARRAY
  dyndbg: tweak pr_fmt to avoid expansion conflicts
  dyndbg: reduce verbose/debug clutter
  dyndbg: refactor param_set_dyndbg_classes and below
  dyndbg: tighten fn-sig of ddebug_apply_class_bitmap
  dyndbg: replace classmap list with a vector
  dyndbg: macrofy a 2-index for-loop pattern
  dyndbg: DECLARE_DYNDBG_CLASSMAP needs stub defn
  dyndbg,module: make proper substructs in _ddebug_info
  dyndbg: hoist classmap-filter-by-modname up to ddebug_add_module
  dyndbg: move mod_name from ddebug_table down to _ddebug_info
  dyndbg-API: remove DD_CLASS_TYPE_(DISJOINT|LEVEL)_NAMES and code
  selftests-dyndbg: add a dynamic_debug run_tests target
  dyndbg: change __dynamic_func_call_cls* macros into expressions
  dyndbg-API: replace DECLARE_DYNDBG_CLASSMAP
  dyndbg: detect class_id reservation conflicts
  dyndbg: check DYNAMIC_DEBUG_CLASSMAP_DEFINE args at compile-time
  dyndbg-test: change do_prints testpoint to accept a loopct
  dyndbg-API: promote DYNAMIC_DEBUG_CLASSMAP_PARAM to API
  dyndbg: treat comma as a token separator
  dyndbg: split multi-query strings with %
  selftests-dyndbg: add test_mod_submod
  dyndbg: resolve "protection" of class'd pr_debugs
  dyndbg: add DYNAMIC_DEBUG_CLASSMAP_USE_(clname,_base)
  docs/dyndbg: add classmap info to howto

CC: Louis Chauvet <louis.chauvet@bootlin.com>
Cc: ukaszb@chromium.org
cc: andrewjballance@gmail.com

 .../admin-guide/dynamic-debug-howto.rst       | 179 ++++-
 MAINTAINERS                                   |   3 +-
 include/asm-generic/vmlinux.lds.h             |   5 +-
 include/linux/dynamic_debug.h                 | 304 ++++++--
 kernel/module/main.c                          |  15 +-
 lib/Kconfig.debug                             |  24 +-
 lib/Makefile                                  |   5 +
 lib/dynamic_debug.c                           | 678 +++++++++++-------
 lib/test_dynamic_debug.c                      | 198 +++--
 lib/test_dynamic_debug_submod.c               |  21 +
 tools/testing/selftests/Makefile              |   1 +
 .../testing/selftests/dynamic_debug/Makefile  |   9 +
 tools/testing/selftests/dynamic_debug/config  |   7 +
 .../dynamic_debug/dyndbg_selftest.sh          | 373 ++++++++++
 14 files changed, 1393 insertions(+), 429 deletions(-)
 create mode 100644 lib/test_dynamic_debug_submod.c
 create mode 100644 tools/testing/selftests/dynamic_debug/Makefile
 create mode 100644 tools/testing/selftests/dynamic_debug/config
 create mode 100755 tools/testing/selftests/dynamic_debug/dyndbg_selftest.sh

-- 
2.51.0


^ permalink raw reply	[flat|nested] 33+ messages in thread

end of thread, other threads:[~2025-10-14  8:03 UTC | newest]

Thread overview: 33+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-10-09 17:58 [PATCH v5 00/30] Fix DYNAMIC_DEBUG classmaps for DRM Jim Cromie
2025-10-09 17:58 ` [PATCH v5 01/30] docs/dyndbg: update examples \012 to \n Jim Cromie
2025-10-09 17:58 ` [PATCH v5 02/30] docs/dyndbg: explain flags parse 1st Jim Cromie
2025-10-09 17:58 ` [PATCH v5 03/30] test-dyndbg: fixup CLASSMAP usage error Jim Cromie
2025-10-09 17:58 ` [PATCH v5 04/30] dyndbg: reword "class unknown, " to "class:_UNKNOWN_" Jim Cromie
2025-10-09 17:58 ` [PATCH v5 05/30] dyndbg: make ddebug_class_param union members same size Jim Cromie
2025-10-09 17:58 ` [PATCH v5 06/30] dyndbg: drop NUM_TYPE_ARRAY Jim Cromie
2025-10-09 17:58 ` [PATCH v5 07/30] dyndbg: tweak pr_fmt to avoid expansion conflicts Jim Cromie
2025-10-09 17:58 ` [PATCH v5 08/30] dyndbg: reduce verbose/debug clutter Jim Cromie
2025-10-09 17:58 ` [PATCH v5 09/30] dyndbg: refactor param_set_dyndbg_classes and below Jim Cromie
2025-10-09 17:58 ` [PATCH v5 10/30] dyndbg: tighten fn-sig of ddebug_apply_class_bitmap Jim Cromie
2025-10-09 17:58 ` [PATCH v5 11/30] dyndbg: replace classmap list with a vector Jim Cromie
2025-10-09 17:58 ` [PATCH v5 12/30] dyndbg: macrofy a 2-index for-loop pattern Jim Cromie
2025-10-09 17:58 ` [PATCH v5 13/30] dyndbg: DECLARE_DYNDBG_CLASSMAP needs stub defn Jim Cromie
2025-10-09 17:58 ` [PATCH v5 14/30] dyndbg, module: make proper substructs in _ddebug_info Jim Cromie
2025-10-09 17:58 ` [PATCH v5 15/30] dyndbg: hoist classmap-filter-by-modname up to ddebug_add_module Jim Cromie
2025-10-09 17:58 ` [PATCH v5 16/30] dyndbg: move mod_name from ddebug_table down to _ddebug_info Jim Cromie
2025-10-09 17:58 ` [PATCH v5 17/30] dyndbg-API: remove DD_CLASS_TYPE_(DISJOINT|LEVEL)_NAMES and code Jim Cromie
2025-10-09 17:58 ` [PATCH v5 18/30] selftests-dyndbg: add a dynamic_debug run_tests target Jim Cromie
2025-10-09 17:58 ` [PATCH v5 19/30] dyndbg: change __dynamic_func_call_cls* macros into expressions Jim Cromie
2025-10-09 17:58 ` [PATCH v5 20/30] dyndbg-API: replace DECLARE_DYNDBG_CLASSMAP Jim Cromie
2025-10-09 17:58 ` [PATCH v5 21/30] dyndbg: detect class_id reservation conflicts Jim Cromie
2025-10-09 17:58 ` [PATCH v5 22/30] dyndbg: check DYNAMIC_DEBUG_CLASSMAP_DEFINE args at compile-time Jim Cromie
2025-10-09 17:58 ` [PATCH v5 23/30] dyndbg-test: change do_prints testpoint to accept a loopct Jim Cromie
2025-10-09 17:58 ` [PATCH v5 24/30] dyndbg-API: promote DYNAMIC_DEBUG_CLASSMAP_PARAM to API Jim Cromie
2025-10-09 17:58 ` [PATCH v5 25/30] dyndbg: treat comma as a token separator Jim Cromie
2025-10-09 17:58 ` [PATCH v5 26/30] dyndbg: split multi-query strings with % Jim Cromie
2025-10-09 17:58 ` [PATCH v5 27/30] selftests-dyndbg: add test_mod_submod Jim Cromie
2025-10-09 17:58 ` [PATCH v5 28/30] dyndbg: resolve "protection" of class'd pr_debugs Jim Cromie
2025-10-09 17:58 ` [PATCH v5 29/30] dyndbg: add DYNAMIC_DEBUG_CLASSMAP_USE_(clname, _base) Jim Cromie
2025-10-09 17:58 ` [PATCH v5 30/30] docs/dyndbg: add classmap info to howto Jim Cromie
2025-10-13 23:03 ` ✓ i915.CI.BAT: success for Fix DYNAMIC_DEBUG classmaps for DRM Patchwork
2025-10-14  8:03 ` ✓ i915.CI.Full: " Patchwork

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