mm/vmscan: push lruvec pointer into inactive_list_is_low()

Switch mem_cgroup_inactive_anon_is_low() to lruvec pointers,
mem_cgroup_get_lruvec_size() is more effective than
mem_cgroup_zone_nr_lru_pages()

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
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 ccb3e3c..fc81dc2 100644 (file)
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -118,10 +118,8 @@ void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
 /*
  * For memory reclaim.
  */
-int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
-                                   struct zone *zone);
-int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
-                                   struct zone *zone);
+int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec);
+int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec);
 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
 unsigned long mem_cgroup_get_lruvec_size(struct lruvec *lruvec, enum lru_list);
 struct zone_reclaim_stat*
@@ -330,13 +328,13 @@ static inline bool mem_cgroup_disabled(void)
 }
 
 static inline int
-mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
+mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
 {
        return 1;
 }
 
 static inline int
-mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
+mem_cgroup_inactive_file_is_low(struct lruvec *lruvec)
 {
        return 1;
 }

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a68db29..9d17646 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1208,19 +1208,15 @@ int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg)
        return ret;
 }
 
-int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
+int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
 {
        unsigned long inactive_ratio;
-       int nid = zone_to_nid(zone);
-       int zid = zone_idx(zone);
        unsigned long inactive;
        unsigned long active;
        unsigned long gb;
 
-       inactive = mem_cgroup_zone_nr_lru_pages(memcg, nid, zid,
-                                               BIT(LRU_INACTIVE_ANON));
-       active = mem_cgroup_zone_nr_lru_pages(memcg, nid, zid,
-                                             BIT(LRU_ACTIVE_ANON));
+       inactive = mem_cgroup_get_lruvec_size(lruvec, LRU_INACTIVE_ANON);
+       active = mem_cgroup_get_lruvec_size(lruvec, LRU_ACTIVE_ANON);
 
        gb = (inactive + active) >> (30 - PAGE_SHIFT);
        if (gb)
@@ -1231,17 +1227,13 @@ int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
        return inactive * inactive_ratio < active;
 }
 
-int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
+int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec)
 {
        unsigned long active;
        unsigned long inactive;
-       int zid = zone_idx(zone);
-       int nid = zone_to_nid(zone);
 
-       inactive = mem_cgroup_zone_nr_lru_pages(memcg, nid, zid,
-                                               BIT(LRU_INACTIVE_FILE));
-       active = mem_cgroup_zone_nr_lru_pages(memcg, nid, zid,
-                                             BIT(LRU_ACTIVE_FILE));
+       inactive = mem_cgroup_get_lruvec_size(lruvec, LRU_INACTIVE_FILE);
+       active = mem_cgroup_get_lruvec_size(lruvec, LRU_ACTIVE_FILE);
 
        return (active > inactive);
 }

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 5318faa..79e2ead 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1488,13 +1488,12 @@ static int inactive_anon_is_low_global(struct zone *zone)
 
 /**
  * inactive_anon_is_low - check if anonymous pages need to be deactivated
- * @zone: zone to check
- * @sc:   scan control of this context
+ * @lruvec: LRU vector to check
  *
  * Returns true if the zone does not have enough inactive anon pages,
  * meaning some active anon pages need to be deactivated.
  */
-static int inactive_anon_is_low(struct mem_cgroup_zone *mz)
+static int inactive_anon_is_low(struct lruvec *lruvec)
 {
        /*
         * If we don't have swap space, anonymous page deactivation
@@ -1504,13 +1503,12 @@ static int inactive_anon_is_low(struct mem_cgroup_zone *mz)
                return 0;
 
        if (!mem_cgroup_disabled())
-               return mem_cgroup_inactive_anon_is_low(mz->mem_cgroup,
-                                                      mz->zone);
+               return mem_cgroup_inactive_anon_is_low(lruvec);
 
-       return inactive_anon_is_low_global(mz->zone);
+       return inactive_anon_is_low_global(lruvec_zone(lruvec));
 }
 #else
-static inline int inactive_anon_is_low(struct mem_cgroup_zone *mz)
+static inline int inactive_anon_is_low(struct lruvec *lruvec)
 {
        return 0;
 }
@@ -1528,7 +1526,7 @@ static int inactive_file_is_low_global(struct zone *zone)
 
 /**
  * inactive_file_is_low - check if file pages need to be deactivated
- * @mz: memory cgroup and zone to check
+ * @lruvec: LRU vector to check
  *
  * When the system is doing streaming IO, memory pressure here
  * ensures that active file pages get deactivated, until more
@@ -1540,21 +1538,20 @@ static int inactive_file_is_low_global(struct zone *zone)
  * This uses a different ratio than the anonymous pages, because
  * the page cache uses a use-once replacement algorithm.
  */
-static int inactive_file_is_low(struct mem_cgroup_zone *mz)
+static int inactive_file_is_low(struct lruvec *lruvec)
 {
        if (!mem_cgroup_disabled())
-               return mem_cgroup_inactive_file_is_low(mz->mem_cgroup,
-                                                      mz->zone);
+               return mem_cgroup_inactive_file_is_low(lruvec);
 
-       return inactive_file_is_low_global(mz->zone);
+       return inactive_file_is_low_global(lruvec_zone(lruvec));
 }
 
-static int inactive_list_is_low(struct mem_cgroup_zone *mz, int file)
+static int inactive_list_is_low(struct lruvec *lruvec, int file)
 {
        if (file)
-               return inactive_file_is_low(mz);
+               return inactive_file_is_low(lruvec);
        else
-               return inactive_anon_is_low(mz);
+               return inactive_anon_is_low(lruvec);
 }
 
 static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
@@ -1564,7 +1561,10 @@ static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
        int file = is_file_lru(lru);
 
        if (is_active_lru(lru)) {
-               if (inactive_list_is_low(mz, file))
+               struct lruvec *lruvec = mem_cgroup_zone_lruvec(mz->zone,
+                                                              mz->mem_cgroup);
+
+               if (inactive_list_is_low(lruvec, file))
                        shrink_active_list(nr_to_scan, mz, sc, lru);
                return 0;
        }
@@ -1793,6 +1793,9 @@ static void shrink_mem_cgroup_zone(struct mem_cgroup_zone *mz,
        unsigned long nr_reclaimed, nr_scanned;
        unsigned long nr_to_reclaim = sc->nr_to_reclaim;
        struct blk_plug plug;
+       struct lruvec *lruvec;
+
+       lruvec = mem_cgroup_zone_lruvec(mz->zone, mz->mem_cgroup);
 
 restart:
        nr_reclaimed = 0;
@@ -1831,7 +1834,7 @@ restart:
         * Even if we did not try to evict anon pages at all, we want to
         * rebalance the anon lru active/inactive ratio.
         */
-       if (inactive_anon_is_low(mz))
+       if (inactive_anon_is_low(lruvec))
                shrink_active_list(SWAP_CLUSTER_MAX, mz,
                                   sc, LRU_ACTIVE_ANON);
 
@@ -2264,12 +2267,13 @@ static void age_active_anon(struct zone *zone, struct scan_control *sc)
 
        memcg = mem_cgroup_iter(NULL, NULL, NULL);
        do {
+               struct lruvec *lruvec = mem_cgroup_zone_lruvec(zone, memcg);
                struct mem_cgroup_zone mz = {
                        .mem_cgroup = memcg,
                        .zone = zone,
                };
 
-               if (inactive_anon_is_low(&mz))
+               if (inactive_anon_is_low(lruvec))
                        shrink_active_list(SWAP_CLUSTER_MAX, &mz,
                                           sc, LRU_ACTIVE_ANON);