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Patch series "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.
This patch (of 9):
memcg_account_kmem() consists of a trivial statistics change via
mod_memcg_state() call and a relatively large memcg1-specific part.
Let's factor out the mod_memcg_state() call and move the rest into the
mm/memcontrol-v1.c file. Also rename memcg_account_kmem() into
memcg1_account_kmem() for consistency.
Link: https://lkml.kernel.org/r/20240628210317.272856-1-roman.gushchin@linux.dev
Link: https://lkml.kernel.org/r/20240628210317.272856-2-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
04fbe921d3