linux-kernel - Re: [PATCH v6 00/11] use DYNAMIC

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Message-ID: <7017599d-8e11-7bda-90df-3cbf39ef8f3b@akamai.com>
Date:   Wed, 25 Aug 2021 13:18:44 -0400
From:   Jason Baron <jbaron@...mai.com>
To:     Jim Cromie <jim.cromie@...il.com>, gregkh@...uxfoundation.org,
        seanpaul@...omium.org, jeyu@...nel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        amd-gfx@...ts.freedesktop.org, intel-gvt-dev@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org
Subject: Re: [PATCH v6 00/11] use DYNAMIC_DEBUG to implement DRM.debug



On 8/22/21 6:19 PM, Jim Cromie wrote:
> 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.


Hi Jim,

Yeah, I feel like the RFC patches should be in a separate series
unless there is a drm dependency for them?

Thanks,

-Jason


> 
> 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
>