bridge: add support of adding and deleting mdb entries

[karo-tx-linux.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 7acf43bf04a270cf2bf90f342c66142d1c5cf675..dd39ba000b31f98730c6fd6d22bdf695ced3bedf 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1055,12 +1055,24 @@ struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
                                      struct mem_cgroup *memcg)
 {
        struct mem_cgroup_per_zone *mz;
+       struct lruvec *lruvec;
 
-       if (mem_cgroup_disabled())
-               return &zone->lruvec;
+       if (mem_cgroup_disabled()) {
+               lruvec = &zone->lruvec;
+               goto out;
+       }
 
        mz = mem_cgroup_zoneinfo(memcg, zone_to_nid(zone), zone_idx(zone));
-       return &mz->lruvec;
+       lruvec = &mz->lruvec;
+out:
+       /*
+        * Since a node can be onlined after the mem_cgroup was created,
+        * we have to be prepared to initialize lruvec->zone here;
+        * and if offlined then reonlined, we need to reinitialize it.
+        */
+       if (unlikely(lruvec->zone != zone))
+               lruvec->zone = zone;
+       return lruvec;
 }
 
 /*
@@ -1087,9 +1099,12 @@ struct lruvec *mem_cgroup_page_lruvec(struct page *page, struct zone *zone)
        struct mem_cgroup_per_zone *mz;
        struct mem_cgroup *memcg;
        struct page_cgroup *pc;
+       struct lruvec *lruvec;
 
-       if (mem_cgroup_disabled())
-               return &zone->lruvec;
+       if (mem_cgroup_disabled()) {
+               lruvec = &zone->lruvec;
+               goto out;
+       }
 
        pc = lookup_page_cgroup(page);
        memcg = pc->mem_cgroup;
@@ -1107,7 +1122,16 @@ struct lruvec *mem_cgroup_page_lruvec(struct page *page, struct zone *zone)
                pc->mem_cgroup = memcg = root_mem_cgroup;
 
        mz = page_cgroup_zoneinfo(memcg, page);
-       return &mz->lruvec;
+       lruvec = &mz->lruvec;
+out:
+       /*
+        * Since a node can be onlined after the mem_cgroup was created,
+        * we have to be prepared to initialize lruvec->zone here;
+        * and if offlined then reonlined, we need to reinitialize it.
+        */
+       if (unlikely(lruvec->zone != zone))
+               lruvec->zone = zone;
+       return lruvec;
 }
 
 /**
@@ -1452,17 +1476,26 @@ static int mem_cgroup_count_children(struct mem_cgroup *memcg)
 static u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
 {
        u64 limit;
-       u64 memsw;
 
        limit = res_counter_read_u64(&memcg->res, RES_LIMIT);
-       limit += total_swap_pages << PAGE_SHIFT;
 
-       memsw = res_counter_read_u64(&memcg->memsw, RES_LIMIT);
        /*
-        * If memsw is finite and limits the amount of swap space available
-        * to this memcg, return that limit.
+        * Do not consider swap space if we cannot swap due to swappiness
         */
-       return min(limit, memsw);
+       if (mem_cgroup_swappiness(memcg)) {
+               u64 memsw;
+
+               limit += total_swap_pages << PAGE_SHIFT;
+               memsw = res_counter_read_u64(&memcg->memsw, RES_LIMIT);
+
+               /*
+                * If memsw is finite and limits the amount of swap space
+                * available to this memcg, return that limit.
+                */
+               limit = min(limit, memsw);
+       }
+
+       return limit;
 }
 
 void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
@@ -3688,17 +3721,17 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
 static bool mem_cgroup_force_empty_list(struct mem_cgroup *memcg,
                                int node, int zid, enum lru_list lru)
 {
-       struct mem_cgroup_per_zone *mz;
+       struct lruvec *lruvec;
        unsigned long flags, loop;
        struct list_head *list;
        struct page *busy;
        struct zone *zone;
 
        zone = &NODE_DATA(node)->node_zones[zid];
-       mz = mem_cgroup_zoneinfo(memcg, node, zid);
-       list = &mz->lruvec.lists[lru];
+       lruvec = mem_cgroup_zone_lruvec(zone, memcg);
+       list = &lruvec->lists[lru];
 
-       loop = mz->lru_size[lru];
+       loop = mem_cgroup_get_lru_size(lruvec, lru);
        /* give some margin against EBUSY etc...*/
        loop += 256;
        busy = NULL;
@@ -4736,7 +4769,7 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *memcg, int node)
 
        for (zone = 0; zone < MAX_NR_ZONES; zone++) {
                mz = &pn->zoneinfo[zone];
-               lruvec_init(&mz->lruvec, &NODE_DATA(node)->node_zones[zone]);
+               lruvec_init(&mz->lruvec);
                mz->usage_in_excess = 0;
                mz->on_tree = false;
                mz->memcg = memcg;