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mm: memcontrol: replace zone summing with lruvec_page_state()

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

Link: http://lkml.kernel.org/r/20190228163020.24100-3-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 17:18:00 -07:00
committed by Linus Torvalds
parent e0ee0e7107
commit 1a61ab8038
3 changed files with 2 additions and 20 deletions
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mm/memcontrol.c
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@@ -737,7 +737,7 @@ unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg,
for_each_lru(lru) {
if (!(BIT(lru) & lru_mask))
continue;
nr += mem_cgroup_get_lru_size(lruvec, lru);
nr += lruvec_page_state(lruvec, NR_LRU_BASE + lru);
}
return nr;
}