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-rw-r--r--include/linux/memcontrol.h107
1 files changed, 63 insertions, 44 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 24797929d8a1..3096c9a0ee01 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -105,14 +105,6 @@ struct mem_cgroup_reclaim_iter {
unsigned int generation;
};
-struct lruvec_stat {
- long count[NR_VM_NODE_STAT_ITEMS];
-};
-
-struct batched_lruvec_stat {
- s32 count[NR_VM_NODE_STAT_ITEMS];
-};
-
/*
* Bitmap and deferred work of shrinker::id corresponding to memcg-aware
* shrinkers, which have elements charged to this memcg.
@@ -123,24 +115,30 @@ struct shrinker_info {
unsigned long *map;
};
+struct lruvec_stats_percpu {
+ /* Local (CPU and cgroup) state */
+ long state[NR_VM_NODE_STAT_ITEMS];
+
+ /* Delta calculation for lockless upward propagation */
+ long state_prev[NR_VM_NODE_STAT_ITEMS];
+};
+
+struct lruvec_stats {
+ /* Aggregated (CPU and subtree) state */
+ long state[NR_VM_NODE_STAT_ITEMS];
+
+ /* Pending child counts during tree propagation */
+ long state_pending[NR_VM_NODE_STAT_ITEMS];
+};
+
/*
* per-node information in memory controller.
*/
struct mem_cgroup_per_node {
struct lruvec lruvec;
- /*
- * Legacy local VM stats. This should be struct lruvec_stat and
- * cannot be optimized to struct batched_lruvec_stat. Because
- * the threshold of the lruvec_stat_cpu can be as big as
- * MEMCG_CHARGE_BATCH * PAGE_SIZE. It can fit into s32. But this
- * filed has no upper limit.
- */
- struct lruvec_stat __percpu *lruvec_stat_local;
-
- /* Subtree VM stats (batched updates) */
- struct batched_lruvec_stat __percpu *lruvec_stat_cpu;
- atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS];
+ struct lruvec_stats_percpu __percpu *lruvec_stats_percpu;
+ struct lruvec_stats lruvec_stats;
unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS];
@@ -595,13 +593,6 @@ static inline struct obj_cgroup **page_objcgs_check(struct page *page)
}
#endif
-static __always_inline bool memcg_stat_item_in_bytes(int idx)
-{
- if (idx == MEMCG_PERCPU_B)
- return true;
- return vmstat_item_in_bytes(idx);
-}
-
static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
{
return (memcg == root_mem_cgroup);
@@ -693,13 +684,35 @@ static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg)
page_counter_read(&memcg->memory);
}
-int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask);
+int __mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+ gfp_t gfp_mask);
+static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+ gfp_t gfp_mask)
+{
+ if (mem_cgroup_disabled())
+ return 0;
+ return __mem_cgroup_charge(page, mm, gfp_mask);
+}
+
int mem_cgroup_swapin_charge_page(struct page *page, struct mm_struct *mm,
gfp_t gfp, swp_entry_t entry);
void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry);
-void mem_cgroup_uncharge(struct page *page);
-void mem_cgroup_uncharge_list(struct list_head *page_list);
+void __mem_cgroup_uncharge(struct page *page);
+static inline void mem_cgroup_uncharge(struct page *page)
+{
+ if (mem_cgroup_disabled())
+ return;
+ __mem_cgroup_uncharge(page);
+}
+
+void __mem_cgroup_uncharge_list(struct list_head *page_list);
+static inline void mem_cgroup_uncharge_list(struct list_head *page_list)
+{
+ if (mem_cgroup_disabled())
+ return;
+ __mem_cgroup_uncharge_list(page_list);
+}
void mem_cgroup_migrate(struct page *oldpage, struct page *newpage);
@@ -884,11 +897,6 @@ static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
return !!(memcg->css.flags & CSS_ONLINE);
}
-/*
- * For memory reclaim.
- */
-int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
-
void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
int zid, int nr_pages);
@@ -955,22 +963,21 @@ static inline void mod_memcg_state(struct mem_cgroup *memcg,
local_irq_restore(flags);
}
+static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx)
+{
+ return READ_ONCE(memcg->vmstats.state[idx]);
+}
+
static inline unsigned long lruvec_page_state(struct lruvec *lruvec,
enum node_stat_item idx)
{
struct mem_cgroup_per_node *pn;
- long x;
if (mem_cgroup_disabled())
return node_page_state(lruvec_pgdat(lruvec), idx);
pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
- x = atomic_long_read(&pn->lruvec_stat[idx]);
-#ifdef CONFIG_SMP
- if (x < 0)
- x = 0;
-#endif
- return x;
+ return READ_ONCE(pn->lruvec_stats.state[idx]);
}
static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec,
@@ -985,7 +992,7 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec,
pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
for_each_possible_cpu(cpu)
- x += per_cpu(pn->lruvec_stat_local->count[idx], cpu);
+ x += per_cpu(pn->lruvec_stats_percpu->state[idx], cpu);
#ifdef CONFIG_SMP
if (x < 0)
x = 0;
@@ -993,6 +1000,8 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec,
return x;
}
+void mem_cgroup_flush_stats(void);
+
void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx,
int val);
void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val);
@@ -1391,6 +1400,11 @@ static inline void mod_memcg_state(struct mem_cgroup *memcg,
{
}
+static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx)
+{
+ return 0;
+}
+
static inline unsigned long lruvec_page_state(struct lruvec *lruvec,
enum node_stat_item idx)
{
@@ -1403,6 +1417,10 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec,
return node_page_state(lruvec_pgdat(lruvec), idx);
}
+static inline void mem_cgroup_flush_stats(void)
+{
+}
+
static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx, int val)
{
@@ -1582,7 +1600,8 @@ static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb)
#endif /* CONFIG_CGROUP_WRITEBACK */
struct sock;
-bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
+bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages,
+ gfp_t gfp_mask);
void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
#ifdef CONFIG_MEMCG
extern struct static_key_false memcg_sockets_enabled_key;