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Diffstat (limited to 'mm/list_lru.c')
-rw-r--r--mm/list_lru.c22
1 files changed, 20 insertions, 2 deletions
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);