[PATCH v2 0/5] use refcount+RCU method to implement lockless slab shrink (part 1)

[Qi Zheng]

Hi all,

To make reviewing and updating easier, I've chosen to split the previous
patchset[1] into the following three parts:

part 1: some cleanups and preparations
part 2: introduce new APIs and convert all shrinnkers to use these
part 3: implement lockless slab shrink

This series is the part 1 and is based on the next-20230815.

Comments and suggestions are welcome.

[1]. https://lore.kernel.org/lkml/20230807110936.21819-1-zhengqi.arch@bytedance.com/

Thanks,
Qi

Changlog in part 1 v1 -> part 1 v2:
 - fix compilation warning in [PATCH 1/5]
 - rename synchronize_shrinkers() to ttm_pool_synchronize_shrinkers()
   (pointed by Christian König)
 - collect Reviewed-by

Changlog in v4 -> part 1 v1:
 - split from the previous large patchset
 - fix comment format in [PATCH v4 01/48] (pointed by Muchun Song)
 - change to use kzalloc_node() and fix typo in [PATCH v4 44/48]
   (pointed by Dave Chinner)
 - collect Reviewed-bys
 - rebase onto the next-20230815

Qi Zheng (5):
  mm: move some shrinker-related function declarations to mm/internal.h
  mm: vmscan: move shrinker-related code into a separate file
  mm: shrinker: remove redundant shrinker_rwsem in debugfs operations
  drm/ttm: introduce pool_shrink_rwsem
  mm: shrinker: add a secondary array for shrinker_info::{map,
    nr_deferred}

 drivers/gpu/drm/ttm/ttm_pool.c |  17 +-
 include/linux/memcontrol.h     |  12 +-
 include/linux/shrinker.h       |  37 +-
 mm/Makefile                    |   4 +-
 mm/internal.h                  |  28 ++
 mm/shrinker.c                  | 751 +++++++++++++++++++++++++++++++++
 mm/shrinker_debug.c            |  18 +-
 mm/vmscan.c                    | 701 ------------------------------
 8 files changed, 818 insertions(+), 750 deletions(-)
 create mode 100644 mm/shrinker.c

-- 
2.30.2