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mm: memcontrol: replace node summing with memcg_page_state()

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Instead of adding up the node counters, use memcg_page_state() to get the
memcg state directly.  This is a bit cheaper and more stream-lined.

Link: http://lkml.kernel.org/r/20190228163020.24100-4-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Roman Gushchin <guro@fb.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2019-05-13 17:18:03 -07:00 committed by Linus Torvalds
parent 1a61ab8038
commit 22796c844f
1 changed files with 6 additions and 3 deletions
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9
mm/memcontrol.c
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@ -746,10 +746,13 @@ static unsigned long mem_cgroup_nr_lru_pages(struct mem_cgroup *memcg,
unsigned int lru_mask)
{
unsigned long nr = 0;
int nid;
enum lru_list lru;
for_each_node_state(nid, N_MEMORY)
nr += mem_cgroup_node_nr_lru_pages(memcg, nid, lru_mask);
for_each_lru(lru) {
if (!(BIT(lru) & lru_mask))
continue;
nr += memcg_page_state(memcg, NR_LRU_BASE + lru);
}
return nr;
}