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-rw-r--r--include/linux/memcontrol.h4
-rw-r--r--mm/list_lru.c22
-rw-r--r--mm/memcontrol.c13
3 files changed, 37 insertions, 2 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 258c8a46959a..0e6c515fb698 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -1286,6 +1286,8 @@ static inline int memcg_cache_id(struct mem_cgroup *memcg)
extern int memcg_expand_shrinker_maps(int new_id);
+extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg,
+ int nid, int shrinker_id);
#else
#define for_each_memcg_cache_index(_idx) \
for (; NULL; )
@@ -1308,6 +1310,8 @@ static inline void memcg_put_cache_ids(void)
{
}
+static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg,
+ int nid, int shrinker_id) { }
#endif /* CONFIG_MEMCG_KMEM */
#endif /* _LINUX_MEMCONTROL_H */
diff --git a/mm/list_lru.c b/mm/list_lru.c
index c6131925ec76..c9bdde9c03d1 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -30,6 +30,11 @@ static void list_lru_unregister(struct list_lru *lru)
mutex_unlock(&list_lrus_mutex);
}
+static int lru_shrinker_id(struct list_lru *lru)
+{
+ return lru->shrinker_id;
+}
+
static inline bool list_lru_memcg_aware(struct list_lru *lru)
{
/*
@@ -93,6 +98,11 @@ static void list_lru_unregister(struct list_lru *lru)
{
}
+static int lru_shrinker_id(struct list_lru *lru)
+{
+ return -1;
+}
+
static inline bool list_lru_memcg_aware(struct list_lru *lru)
{
return false;
@@ -118,13 +128,17 @@ bool list_lru_add(struct list_lru *lru, struct list_head *item)
{
int nid = page_to_nid(virt_to_page(item));
struct list_lru_node *nlru = &lru->node[nid];
+ struct mem_cgroup *memcg;
struct list_lru_one *l;
spin_lock(&nlru->lock);
if (list_empty(item)) {
- l = list_lru_from_kmem(nlru, item, NULL);
+ l = list_lru_from_kmem(nlru, item, &memcg);
list_add_tail(item, &l->list);
- l->nr_items++;
+ /* Set shrinker bit if the first element was added */
+ if (!l->nr_items++)
+ memcg_set_shrinker_bit(memcg, nid,
+ lru_shrinker_id(lru));
nlru->nr_items++;
spin_unlock(&nlru->lock);
return true;
@@ -507,6 +521,7 @@ static void memcg_drain_list_lru_node(struct list_lru *lru, int nid,
struct list_lru_node *nlru = &lru->node[nid];
int dst_idx = dst_memcg->kmemcg_id;
struct list_lru_one *src, *dst;
+ bool set;
/*
* Since list_lru_{add,del} may be called under an IRQ-safe lock,
@@ -518,7 +533,10 @@ static void memcg_drain_list_lru_node(struct list_lru *lru, int nid,
dst = list_lru_from_memcg_idx(nlru, dst_idx);
list_splice_init(&src->list, &dst->list);
+ set = (!dst->nr_items && src->nr_items);
dst->nr_items += src->nr_items;
+ if (set)
+ memcg_set_shrinker_bit(dst_memcg, nid, lru_shrinker_id(lru));
src->nr_items = 0;
spin_unlock_irq(&nlru->lock);
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index d8cd6c39eca5..55c010a58535 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -422,6 +422,19 @@ unlock:
mutex_unlock(&memcg_shrinker_map_mutex);
return ret;
}
+
+void memcg_set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id)
+{
+ if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) {
+ struct memcg_shrinker_map *map;
+
+ rcu_read_lock();
+ map = rcu_dereference(memcg->nodeinfo[nid]->shrinker_map);
+ set_bit(shrinker_id, map->map);
+ rcu_read_unlock();
+ }
+}
+
#else /* CONFIG_MEMCG_KMEM */
static int memcg_alloc_shrinker_maps(struct mem_cgroup *memcg)
{