diff options
| -rw-r--r-- | mm/list_lru.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/mm/list_lru.c b/mm/list_lru.c index e1da19fac1b3..28237476b055 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -42,6 +42,10 @@ static void list_lru_unregister(struct list_lru *lru) #ifdef CONFIG_MEMCG_KMEM static inline bool list_lru_memcg_aware(struct list_lru *lru) { + /* + * This needs node 0 to be always present, even + * in the systems supporting sparse numa ids. + */ return !!lru->node[0].memcg_lrus; } @@ -377,16 +381,20 @@ static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware) { int i; - for (i = 0; i < nr_node_ids; i++) { - if (!memcg_aware) - lru->node[i].memcg_lrus = NULL; - else if (memcg_init_list_lru_node(&lru->node[i])) + if (!memcg_aware) + return 0; + + for_each_node(i) { + if (memcg_init_list_lru_node(&lru->node[i])) goto fail; } return 0; fail: - for (i = i - 1; i >= 0; i--) + for (i = i - 1; i >= 0; i--) { + if (!lru->node[i].memcg_lrus) + continue; memcg_destroy_list_lru_node(&lru->node[i]); + } return -ENOMEM; } @@ -397,7 +405,7 @@ static void memcg_destroy_list_lru(struct list_lru *lru) if (!list_lru_memcg_aware(lru)) return; - for (i = 0; i < nr_node_ids; i++) + for_each_node(i) memcg_destroy_list_lru_node(&lru->node[i]); } @@ -409,16 +417,20 @@ static int memcg_update_list_lru(struct list_lru *lru, if (!list_lru_memcg_aware(lru)) return 0; - for (i = 0; i < nr_node_ids; i++) { + for_each_node(i) { if (memcg_update_list_lru_node(&lru->node[i], old_size, new_size)) goto fail; } return 0; fail: - for (i = i - 1; i >= 0; i--) + for (i = i - 1; i >= 0; i--) { + if (!lru->node[i].memcg_lrus) + continue; + memcg_cancel_update_list_lru_node(&lru->node[i], old_size, new_size); + } return -ENOMEM; } @@ -430,7 +442,7 @@ static void memcg_cancel_update_list_lru(struct list_lru *lru, if (!list_lru_memcg_aware(lru)) return; - for (i = 0; i < nr_node_ids; i++) + for_each_node(i) memcg_cancel_update_list_lru_node(&lru->node[i], old_size, new_size); } @@ -485,7 +497,7 @@ static void memcg_drain_list_lru(struct list_lru *lru, if (!list_lru_memcg_aware(lru)) return; - for (i = 0; i < nr_node_ids; i++) + for_each_node(i) memcg_drain_list_lru_node(&lru->node[i], src_idx, dst_idx); } @@ -522,7 +534,7 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, if (!lru->node) goto out; - for (i = 0; i < nr_node_ids; i++) { + for_each_node(i) { spin_lock_init(&lru->node[i].lock); if (key) lockdep_set_class(&lru->node[i].lock, key); |