[PATCH v2 0/5] mm: memcg: merge page_counter trees

[Roman Gushchin]

This patchset reorganizes page_counter structures which helps to make
memory cgroup and hugetlb cgroup structures smaller (10%-35% depending
on the kernel configuration) and more cache-effective. It also eliminates
useless tracking of protected memory usage when it's not needed.

v2:
  - two page_counter structures per hugetlb cgroup instead of one
  - rebased to the current mm branch
  - many minor fixes and improvements
v1:
  https://lore.kernel.org/lkml/20240503201835.2969707-1-roman.gushchin@xxxxxxxxx/T/#m77151ed83451a49132e29ef13d55e08b95ac867f


Roman Gushchin (5):
  mm: memcg: don't call propagate_protected_usage() needlessly
  mm: page_counters: put page_counter_calculate_protection() under
    CONFIG_MEMCG
  mm: memcg: merge multiple page_counters into a single structure
  mm: page_counters: initialize usage using ATOMIC_LONG_INIT() macro
  mm: memcg: convert enum res_type to mem_counter_type

 include/linux/hugetlb.h        |   4 +-
 include/linux/hugetlb_cgroup.h |   8 +-
 include/linux/memcontrol.h     |  19 +--
 include/linux/page_counter.h   | 128 ++++++++++++++++----
 mm/hugetlb.c                   |  14 +--
 mm/hugetlb_cgroup.c            | 150 +++++++++--------------
 mm/memcontrol-v1.c             | 154 ++++++++++--------------
 mm/memcontrol-v1.h             |  10 +-
 mm/memcontrol.c                | 211 ++++++++++++++++-----------------
 mm/page_counter.c              |  94 +++++++++------
 10 files changed, 403 insertions(+), 389 deletions(-)

-- 
2.46.0.rc1.232.g9752f9e123-goog