mm: memcontrol: replace node summing with memcg_page_state()
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>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index f303814..4000ea4 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -746,10 +746,13 @@
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;
}