[PATCH v6 0/8] drm/i915: use ref_tracker library for tracking wakerefs

[Andi Shyti]

Eric, David (Miller),

Could you please check the ref_tracker portion of this series?

This patch has reached its 6th version, and we need your approval
to proceed.

Thank you,
Andi

On Wed, Mar 29, 2023 at 09:24:12AM +0200, Andrzej Hajda wrote:
> Gently ping for network developers, could you look at ref_tracker patches,
> as the ref_tracker library was developed for network.
> 
> This is revived patchset improving ref_tracker library and converting
> i915 internal tracker to ref_tracker.
> The old thread ended without consensus about small kernel allocations,
> which are performed under spinlock.
> I have tried to solve the problem by splitting the calls, but it results
> in complicated API, so I went back to original solution.
> If there are better solutions I am glad to discuss them.
> Meanwhile I send original patchset with addressed remaining comments.
> 
> To: Jani Nikula <jani.nikula at linux.intel.com>
> To: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> To: Rodrigo Vivi <rodrigo.vivi at intel.com>
> To: Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com>
> To: David Airlie <airlied at gmail.com>
> To: Daniel Vetter <daniel at ffwll.ch>
> Cc: linux-kernel at vger.kernel.org
> Cc: intel-gfx at lists.freedesktop.org
> Cc: dri-devel at lists.freedesktop.org
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: netdev at vger.kernel.org
> Cc: Eric Dumazet <edumazet at google.com>
> Cc: Jakub Kicinski <kuba at kernel.org>
> Cc: Dmitry Vyukov <dvyukov at google.com>
> Cc: "David S. Miller" <davem at davemloft.net>
> Cc: Andi Shyti <andi.shyti at linux.intel.com>
> Cc: Das, Nirmoy <nirmoy.das at linux.intel.com>
> Signed-off-by: Andrzej Hajda <andrzej.hajda at intel.com>
> 
> ---
> Changes in v6:
> - rebased to solve minor conflict and allow CI testing
> - Link to v5: https://lore.kernel.org/r/20230224-track_gt-v5-0-77be86f2c872@intel.com
> 
> Changes in v5 (thx Andi for review):
> - use *_locked convention instead of __*,
> - improved commit messages,
> - re-worked i915 patches, squashed separation and conversion patches,
> - added tags,
> - Link to v4: https://lore.kernel.org/r/20230224-track_gt-v4-0-464e8ab4c9ab@intel.com
> 
> Changes in v4:
> - split "Separate wakeref tracking" to smaller parts
> - fixed typos,
> - Link to v1-v3: https://patchwork.freedesktop.org/series/100327/
> 
> ---
> Andrzej Hajda (7):
>       lib/ref_tracker: add unlocked leak print helper
>       lib/ref_tracker: improve printing stats
>       lib/ref_tracker: add printing to memory buffer
>       lib/ref_tracker: remove warnings in case of allocation failure
>       drm/i915: Correct type of wakeref variable
>       drm/i915: Replace custom intel runtime_pm tracker with ref_tracker library
>       drm/i915: track gt pm wakerefs
> 
> Chris Wilson (1):
>       drm/i915/gt: Hold a wakeref for the active VM
> 
>  drivers/gpu/drm/i915/Kconfig.debug                 |  19 ++
>  drivers/gpu/drm/i915/display/intel_display_power.c |   2 +-
>  drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c     |   7 +-
>  .../drm/i915/gem/selftests/i915_gem_coherency.c    |  10 +-
>  drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c |  14 +-
>  drivers/gpu/drm/i915/gt/intel_breadcrumbs.c        |  13 +-
>  drivers/gpu/drm/i915/gt/intel_breadcrumbs_types.h  |   3 +-
>  drivers/gpu/drm/i915/gt/intel_context.h            |  15 +-
>  drivers/gpu/drm/i915/gt/intel_context_types.h      |   2 +
>  drivers/gpu/drm/i915/gt/intel_engine_pm.c          |  10 +-
>  drivers/gpu/drm/i915/gt/intel_engine_types.h       |   2 +
>  .../gpu/drm/i915/gt/intel_execlists_submission.c   |   2 +-
>  drivers/gpu/drm/i915/gt/intel_gt_pm.c              |  12 +-
>  drivers/gpu/drm/i915/gt/intel_gt_pm.h              |  38 +++-
>  drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c      |   4 +-
>  drivers/gpu/drm/i915/gt/selftest_engine_cs.c       |  20 +-
>  drivers/gpu/drm/i915/gt/selftest_gt_pm.c           |   5 +-
>  drivers/gpu/drm/i915/gt/selftest_reset.c           |  10 +-
>  drivers/gpu/drm/i915/gt/selftest_rps.c             |  17 +-
>  drivers/gpu/drm/i915/gt/selftest_slpc.c            |   5 +-
>  drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c  |  11 +-
>  drivers/gpu/drm/i915/i915_driver.c                 |   2 +-
>  drivers/gpu/drm/i915/i915_pmu.c                    |  16 +-
>  drivers/gpu/drm/i915/intel_runtime_pm.c            | 221 ++-------------------
>  drivers/gpu/drm/i915/intel_runtime_pm.h            |  11 +-
>  drivers/gpu/drm/i915/intel_wakeref.c               |   7 +-
>  drivers/gpu/drm/i915/intel_wakeref.h               |  99 ++++++++-
>  include/linux/ref_tracker.h                        |  31 ++-
>  lib/ref_tracker.c                                  | 179 ++++++++++++++---
>  29 files changed, 456 insertions(+), 331 deletions(-)
> ---
> base-commit: d4c9fe2c8c9b66c5e5954f6ded7bc934dd6afe3e
> change-id: 20230224-track_gt-1b3da8bdacd7
> 
> Best regards,
> -- 
> Andrzej Hajda <andrzej.hajda at intel.com>