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author | Johannes Weiner <hannes@cmpxchg.org> | 2021-04-30 07:56:17 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-30 20:20:37 +0200 |
commit | a18e6e6e150a98b9ce3e9acabeff407e7b6ba0c0 (patch) | |
tree | c44a22467af2cba49ba38665f382406faaa4486f /mm/memcontrol.c | |
parent | mm: memcontrol: kill mem_cgroup_nodeinfo() (diff) | |
download | linux-a18e6e6e150a98b9ce3e9acabeff407e7b6ba0c0.tar.xz linux-a18e6e6e150a98b9ce3e9acabeff407e7b6ba0c0.zip |
mm: memcontrol: privatize memcg_page_state query functions
There are no users outside of the memory controller itself. The rest
of the kernel cares either about node or lruvec stats.
Link: https://lkml.kernel.org/r/20210209163304.77088-4-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r-- | mm/memcontrol.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b4a73c41312e..56d1c6e58c3b 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -789,6 +789,38 @@ void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val) __this_cpu_write(memcg->vmstats_percpu->stat[idx], x); } +/* + * idx can be of type enum memcg_stat_item or node_stat_item. + * Keep in sync with memcg_exact_page_state(). + */ +static unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) +{ + long x = atomic_long_read(&memcg->vmstats[idx]); +#ifdef CONFIG_SMP + if (x < 0) + x = 0; +#endif + return x; +} + +/* + * idx can be of type enum memcg_stat_item or node_stat_item. + * Keep in sync with memcg_exact_page_state(). + */ +static unsigned long memcg_page_state_local(struct mem_cgroup *memcg, int idx) +{ + long x = 0; + int cpu; + + for_each_possible_cpu(cpu) + x += per_cpu(memcg->vmstats_local->stat[idx], cpu); +#ifdef CONFIG_SMP + if (x < 0) + x = 0; +#endif + return x; +} + static struct mem_cgroup_per_node * parent_nodeinfo(struct mem_cgroup_per_node *pn, int nid) { |