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| author |   Muchun Song <songmuchun@bytedance.com> | 2021-04-29 22:56:42 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-30 11:20:38 -0700 |
| commit | e74d225910ec3a9999f06934afa068b6a30babf8 (patch) | |
| tree | 4fd277a69f35d87585e008cb3d0b28300c72aebd /lib/test_vmalloc.c | |
| parent | mm: memcontrol: slab: fix obtain a reference to a freeing memcg (diff) | |
| download | wireguard-linux-e74d225910ec3a9999f06934afa068b6a30babf8.tar.xz wireguard-linux-e74d225910ec3a9999f06934afa068b6a30babf8.zip | |
mm: memcontrol: introduce obj_cgroup_{un}charge_pages
We know that the unit of slab object charging is bytes, the unit of kmem
page charging is PAGE_SIZE. If we want to reuse obj_cgroup APIs to
charge the kmem pages, we should pass PAGE_SIZE (as third parameter) to
obj_cgroup_charge(). Because the size is already PAGE_SIZE, we can skip
touch the objcg stock. And obj_cgroup_{un}charge_pages() are introduced
to charge in units of page level.
In the latter patch, we also can reuse those two helpers to charge or
uncharge a number of kernel pages to a object cgroup. This is just a
code movement without any functional changes.
Link: https://lkml.kernel.org/r/20210319163821.20704-3-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Roman Gushchin <guro@fb.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_vmalloc.c')
0 files changed, 0 insertions, 0 deletions