linux-kernel - [PATCH v4 00/10] drm/i915: use ref_tracker library for tracking wakerefs

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Message-Id: <20230224-track_gt-v4-0-464e8ab4c9ab@intel.com>
Date:   Mon, 06 Mar 2023 17:31:57 +0100
From:   Andrzej Hajda <andrzej.hajda@...el.com>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org,
        Chris Wilson <chris@...is-wilson.co.uk>,
        netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Chris Wilson <chris.p.wilson@...el.com>
Subject: [PATCH v4 00/10] drm/i915: use ref_tracker library for tracking wakerefs

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@...ux.intel.com>
To: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
To: Rodrigo Vivi <rodrigo.vivi@...el.com>
To: Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
To: David Airlie <airlied@...il.com>
To: Daniel Vetter <daniel@...ll.ch>
Cc: linux-kernel@...r.kernel.org
Cc: intel-gfx@...ts.freedesktop.org
Cc: dri-devel@...ts.freedesktop.org
Cc: Chris Wilson <chris@...is-wilson.co.uk>
Cc: netdev@...r.kernel.org
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
Signed-off-by: Andrzej Hajda <andrzej.hajda@...el.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: __ref_tracker_dir_print improve printing
      lib/ref_tracker: add printing to memory buffer
      lib/ref_tracker: remove warnings in case of allocation failure
      drm/i915: Separate wakeref tracking types from rpm
      drm/i915: Correct type of wakeref variable
      drm/i915: replace Intel internal tracker with kernel core ref_tracker

Chris Wilson (3):
      drm/i915: Separate wakeref tracking
      drm/i915: Track leaked gt->wakerefs
      drm/i915/gt: Hold a wakeref for the active VM

 drivers/gpu/drm/i915/Kconfig.debug                 |  19 ++
 drivers/gpu/drm/i915/Makefile                      |   1 +
 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               | 112 ++++++++++-
 include/linux/ref_tracker.h                        |  31 ++-
 lib/ref_tracker.c                                  | 179 ++++++++++++++---
 30 files changed, 469 insertions(+), 332 deletions(-)
---
base-commit: 1ddc2effff762c6a109af52f3c39534c7115aebe
change-id: 20230224-track_gt-1b3da8bdacd7

Best regards,
-- 
Andrzej Hajda <andrzej.hajda@...el.com>