[v1,0/9] mm: memcg: put cgroup v1-specific memcg data under CONFIG_MEMCG_V1

Message

Roman Gushchin June 28, 2024, 9:03 p.m. UTC

This patchset puts all cgroup v1's members of struct mem_cgroup,
struct mem_cgroup_per_node and struct task_struct under
the CONFIG_MEMCG_V1 config option. If cgroup v1 support is not
required (and it's true for many cgroup users these days), it
allows to save a bit of memory and compile out some code, some
of which is on relatively hot paths. It also structures the code
a bit better by grouping cgroup v1-specific stuff in one place.


Roman Gushchin (9):
  mm: memcg: move memcg_account_kmem() to memcontrol-v1.c
  mm: memcg: factor out legacy socket memory accounting code
  mm: memcg: guard cgroup v1-specific code in
    mem_cgroup_print_oom_meminfo()
  mm: memcg: gather memcg1-specific fields initialization in
    memcg1_memcg_init()
  mm: memcg: guard memcg1-specific fields accesses in mm/memcontrol.c
  mm: memcg: put memcg1-specific struct mem_cgroup's members under
    CONFIG_MEMCG_V1
  mm: memcg: guard memcg1-specific members of struct mem_cgroup_per_node
  mm: memcg: put struct task_struct::memcg_in_oom under CONFIG_MEMCG_V1
  mm: memcg: put struct task_struct::in_user_fault under CONFIG_MEMCG_V1

 include/linux/memcontrol.h | 147 +++++++++++++++++++------------------
 include/linux/sched.h      |   6 +-
 mm/memcontrol-v1.c         |  38 ++++++++++
 mm/memcontrol-v1.h         |  20 +++++
 mm/memcontrol.c            |  70 +++++++-----------
 5 files changed, 164 insertions(+), 117 deletions(-)