[PATCH v3 0/3] Let userspace know about swapped out panthor GEM objects

[Nicolas Frattaroli]

Panthor has recently gained a GEM shrinker. It allows evicting memory
that backs unused GEM objects to swap.

In this series, both fdinfo and Panthor's gems debugfs are extended so
that information on evicted pages can be gathered by users through these
two methods.

---
Changes in v3:
- Add documentation for new "evicted" memory type in fdinfo
- Link to v2: https://patch.msgid.link/20260421-panthor-bo-reclaim-observability-v2-0-c9135eedfb6f@xxxxxxxxxxxxx

Changes in v2:
- Change reclaimed_count to saturate at INT_MAX
- Add "evictions" column to panthor gems debugfs which prints
  reclaimed_count
- Add a patch to reduce the padding of one panthor gems debugfs column a
  bit
- Link to v1: https://patch.msgid.link/20260420-panthor-bo-reclaim-observability-v1-0-a4d1a36ee84f@xxxxxxxxxxxxx

To: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
To: Maxime Ripard <mripard@xxxxxxxxxx>
To: Thomas Zimmermann <tzimmermann@xxxxxxx>
To: David Airlie <airlied@xxxxxxxxx>
To: Simona Vetter <simona@xxxxxxxx>
To: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
To: Steven Price <steven.price@xxxxxxx>
To: Liviu Dudau <liviu.dudau@xxxxxxx>
To: Jonathan Corbet <corbet@xxxxxxx>
To: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: kernel@xxxxxxxxxxxxx
Cc: linux-doc@xxxxxxxxxxxxxxx
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@xxxxxxxxxxxxx>

---
Nicolas Frattaroli (3):
      drm/fdinfo: Add "evicted" memory accounting
      drm/panthor: Implement evicted status for GEM objects
      drm/panthor: Reduce padding in gems debugfs for refcount

 Documentation/gpu/drm-usage-stats.rst |  6 ++++++
 drivers/gpu/drm/drm_file.c            |  8 ++++++++
 drivers/gpu/drm/panthor/panthor_gem.c | 18 ++++++++++++++----
 drivers/gpu/drm/panthor/panthor_gem.h | 10 ++++++++++
 include/drm/drm_file.h                |  2 ++
 include/drm/drm_gem.h                 |  2 ++
 6 files changed, 42 insertions(+), 4 deletions(-)
---
base-commit: ea61048876a7137897da26dac49ee234fb38a35a
change-id: 20260420-panthor-bo-reclaim-observability-970679c9533c

Best regards,
--  
Nicolas Frattaroli <nicolas.frattaroli@xxxxxxxxxxxxx>