mm: memcontrol: replace zone summing with lruvec_page_state()

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>

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index b238403..65f381b 100644 (file)
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -505,19 +505,6 @@ unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg,
                                           int nid, unsigned int lru_mask);
 
 static inline
-unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
-{
-       struct mem_cgroup_per_node *mz;
-       unsigned long nr_pages = 0;
-       int zid;
-
-       mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
-       for (zid = 0; zid < MAX_NR_ZONES; zid++)
-               nr_pages += mz->lru_zone_size[zid][lru];
-       return nr_pages;
-}
-
-static inline
 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec,
                enum lru_list lru, int zone_idx)
 {
@@ -960,11 +947,6 @@ static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
        return true;
 }
 
-static inline unsigned long
-mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
-{
-       return 0;
-}
 static inline
 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec,
                enum lru_list lru, int zone_idx)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 81a0d39..f303814 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -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;
 }

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 39912c6..e869f9e 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -346,7 +346,7 @@ unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru, int zone
        int zid;
 
        if (!mem_cgroup_disabled())
-               lru_size = mem_cgroup_get_lru_size(lruvec, lru);
+               lru_size = lruvec_page_state(lruvec, NR_LRU_BASE + lru);
        else
                lru_size = node_page_state(lruvec_pgdat(lruvec), NR_LRU_BASE + lru);