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| author | Qi Zheng <zhengqi.arch@bytedance.com> | 2022-01-14 23:09:12 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-15 15:30:31 +0100 |
| commit | 8c57c07741bf28e7d867f1200aa80120b8ca663e (patch) | |
| tree | a1dd720ef152b699ce47a96b3cc96c6cb4c7017d /mm/percpu-internal.h | |
| parent | mm/hwpoison: fix unpoison_memory() (diff) | |
| download | linux-8c57c07741bf28e7d867f1200aa80120b8ca663e.tar.xz linux-8c57c07741bf28e7d867f1200aa80120b8ca663e.zip | |
mm: memcg/percpu: account extra objcg space to memory cgroups
Similar to slab memory allocator, for each accounted percpu object there
is an extra space which is used to store obj_cgroup membership. Charge
it too.
[akpm@linux-foundation.org: fix layout]
Link: https://lkml.kernel.org/r/20211126040606.97836-1-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Dennis Zhou <dennis@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/percpu-internal.h')
| -rw-r--r-- | mm/percpu-internal.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mm/percpu-internal.h b/mm/percpu-internal.h index 639662c20c82..411d1593ef23 100644 --- a/mm/percpu-internal.h +++ b/mm/percpu-internal.h @@ -113,6 +113,24 @@ static inline int pcpu_chunk_map_bits(struct pcpu_chunk *chunk) return pcpu_nr_pages_to_map_bits(chunk->nr_pages); } +#ifdef CONFIG_MEMCG_KMEM +/** + * pcpu_obj_full_size - helper to calculate size of each accounted object + * @size: size of area to allocate in bytes + * + * For each accounted object there is an extra space which is used to store + * obj_cgroup membership. Charge it too. + */ +static inline size_t pcpu_obj_full_size(size_t size) +{ + size_t extra_size; + + extra_size = size / PCPU_MIN_ALLOC_SIZE * sizeof(struct obj_cgroup *); + + return size * num_possible_cpus() + extra_size; +} +#endif /* CONFIG_MEMCG_KMEM */ + #ifdef CONFIG_PERCPU_STATS #include <linux/spinlock.h> |