[0/7] mm: memcg: kmem API cleanup

Message

Roman Gushchin Jan. 9, 2020, 5:27 p.m. UTC

This patchset aims to clean up the kernel memory charging API.
It doesn't bring any functional changes, just removes unused
arguments, duplicate definitions, renames some functions and
fixes some comments.

Currently it's not obvious which functions are most basic
(memcg_kmem_(un)charge_memcg()) and which are based on them
(memcg_kmem_(un)charge()). The patchset renames these functions
and removes unused arguments:

TL;DR:
was:
  memcg_kmem_charge_memcg(page, gfp, order, memcg)
  memcg_kmem_uncharge_memcg(memcg, nr_pages)
  memcg_kmem_charge(page, gfp, order)
  memcg_kmem_uncharge(page, order)

now:
  memcg_kmem_charge(memcg, gfp, nr_pages)
  memcg_kmem_uncharge(memcg, nr_pages)
  memcg_kmem_charge_page(page, gfp, order)
  memcg_kmem_uncharge_page(page, order)


Roman Gushchin (7):
  mm: kmem: remove duplicate definitions of __memcg_kmem_(un)charge()
  mm: kmem: cleanup (__)memcg_kmem_charge_memcg() arguments
  mm: kmem: cleanup memcg_kmem_uncharge_memcg() arguments
  mm: kmem: rename memcg_kmem_(un)charge() into
    memcg_kmem_(un)charge_page()
  mm: kmem: switch to nr_pages in (__)memcg_kmem_charge_memcg()
  mm: memcg/slab: cache page number in memcg_(un)charge_slab()
  mm: kmem: rename (__)memcg_kmem_(un)charge_memcg() to
    __memcg_kmem_(un)charge()

 fs/pipe.c                  |  2 +-
 include/linux/memcontrol.h | 46 ++++++++++++++------------------
 kernel/fork.c              |  9 ++++---
 mm/memcontrol.c            | 54 ++++++++++++++++++--------------------
 mm/page_alloc.c            |  4 +--
 mm/slab.h                  | 22 +++++++++-------
 6 files changed, 65 insertions(+), 72 deletions(-)