linux-kernel - [PATCH v1 0/9] mm: memcg: put cgroup v1-specific memcg data under CONFIG_MEMCG

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Message-ID: <20240628210317.272856-1-roman.gushchin@linux.dev>
Date: Fri, 28 Jun 2024 21:03:08 +0000
From: Roman Gushchin <roman.gushchin@...ux.dev>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...nel.org>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>,
	Roman Gushchin <roman.gushchin@...ux.dev>
Subject: [PATCH v1 0/9] mm: memcg: put cgroup v1-specific memcg data under CONFIG_MEMCG_V1

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(-)

-- 
2.45.2.803.g4e1b14247a-goog