1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_VMSTAT_H
3 #define _LINUX_VMSTAT_H
5 #include <linux/types.h>
6 #include <linux/percpu.h>
7 #include <linux/mmzone.h>
8 #include <linux/vm_event_item.h>
9 #include <linux/atomic.h>
10 #include <linux/static_key.h>
11 #include <linux/mmdebug.h>
13 extern int sysctl_stat_interval;
16 #define ENABLE_NUMA_STAT 1
17 #define DISABLE_NUMA_STAT 0
18 extern int sysctl_vm_numa_stat;
19 DECLARE_STATIC_KEY_TRUE(vm_numa_stat_key);
20 int sysctl_vm_numa_stat_handler(struct ctl_table *table, int write,
21 void *buffer, size_t *length, loff_t *ppos);
26 unsigned nr_unqueued_dirty;
27 unsigned nr_congested;
28 unsigned nr_writeback;
29 unsigned nr_immediate;
31 unsigned nr_activate[ANON_AND_FILE];
33 unsigned nr_unmap_fail;
34 unsigned nr_lazyfree_fail;
37 enum writeback_stat_item {
39 NR_DIRTY_BG_THRESHOLD,
40 NR_VM_WRITEBACK_STAT_ITEMS,
43 #ifdef CONFIG_VM_EVENT_COUNTERS
45 * Light weight per cpu counter implementation.
47 * Counters should only be incremented and no critical kernel component
48 * should rely on the counter values.
50 * Counters are handled completely inline. On many platforms the code
51 * generated will simply be the increment of a global address.
54 struct vm_event_state {
55 unsigned long event[NR_VM_EVENT_ITEMS];
58 DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
61 * vm counters are allowed to be racy. Use raw_cpu_ops to avoid the
62 * local_irq_disable overhead.
64 static inline void __count_vm_event(enum vm_event_item item)
66 raw_cpu_inc(vm_event_states.event[item]);
69 static inline void count_vm_event(enum vm_event_item item)
71 this_cpu_inc(vm_event_states.event[item]);
74 static inline void __count_vm_events(enum vm_event_item item, long delta)
76 raw_cpu_add(vm_event_states.event[item], delta);
79 static inline void count_vm_events(enum vm_event_item item, long delta)
81 this_cpu_add(vm_event_states.event[item], delta);
84 extern void all_vm_events(unsigned long *);
86 extern void vm_events_fold_cpu(int cpu);
90 /* Disable counters */
91 static inline void count_vm_event(enum vm_event_item item)
94 static inline void count_vm_events(enum vm_event_item item, long delta)
97 static inline void __count_vm_event(enum vm_event_item item)
100 static inline void __count_vm_events(enum vm_event_item item, long delta)
103 static inline void all_vm_events(unsigned long *ret)
106 static inline void vm_events_fold_cpu(int cpu)
110 #endif /* CONFIG_VM_EVENT_COUNTERS */
112 #ifdef CONFIG_NUMA_BALANCING
113 #define count_vm_numa_event(x) count_vm_event(x)
114 #define count_vm_numa_events(x, y) count_vm_events(x, y)
116 #define count_vm_numa_event(x) do {} while (0)
117 #define count_vm_numa_events(x, y) do { (void)(y); } while (0)
118 #endif /* CONFIG_NUMA_BALANCING */
120 #ifdef CONFIG_DEBUG_TLBFLUSH
121 #define count_vm_tlb_event(x) count_vm_event(x)
122 #define count_vm_tlb_events(x, y) count_vm_events(x, y)
124 #define count_vm_tlb_event(x) do {} while (0)
125 #define count_vm_tlb_events(x, y) do { (void)(y); } while (0)
128 #define __count_zid_vm_events(item, zid, delta) \
129 __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
132 * Zone and node-based page accounting with per cpu differentials.
134 extern atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS];
135 extern atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS];
136 extern atomic_long_t vm_numa_event[NR_VM_NUMA_EVENT_ITEMS];
139 static inline void zone_numa_event_add(long x, struct zone *zone,
140 enum numa_stat_item item)
142 atomic_long_add(x, &zone->vm_numa_event[item]);
143 atomic_long_add(x, &vm_numa_event[item]);
146 static inline unsigned long zone_numa_event_state(struct zone *zone,
147 enum numa_stat_item item)
149 return atomic_long_read(&zone->vm_numa_event[item]);
152 static inline unsigned long
153 global_numa_event_state(enum numa_stat_item item)
155 return atomic_long_read(&vm_numa_event[item]);
157 #endif /* CONFIG_NUMA */
159 static inline void zone_page_state_add(long x, struct zone *zone,
160 enum zone_stat_item item)
162 atomic_long_add(x, &zone->vm_stat[item]);
163 atomic_long_add(x, &vm_zone_stat[item]);
166 static inline void node_page_state_add(long x, struct pglist_data *pgdat,
167 enum node_stat_item item)
169 atomic_long_add(x, &pgdat->vm_stat[item]);
170 atomic_long_add(x, &vm_node_stat[item]);
173 static inline unsigned long global_zone_page_state(enum zone_stat_item item)
175 long x = atomic_long_read(&vm_zone_stat[item]);
184 unsigned long global_node_page_state_pages(enum node_stat_item item)
186 long x = atomic_long_read(&vm_node_stat[item]);
194 static inline unsigned long global_node_page_state(enum node_stat_item item)
196 VM_WARN_ON_ONCE(vmstat_item_in_bytes(item));
198 return global_node_page_state_pages(item);
201 static inline unsigned long zone_page_state(struct zone *zone,
202 enum zone_stat_item item)
204 long x = atomic_long_read(&zone->vm_stat[item]);
213 * More accurate version that also considers the currently pending
214 * deltas. For that we need to loop over all cpus to find the current
215 * deltas. There is no synchronization so the result cannot be
216 * exactly accurate either.
218 static inline unsigned long zone_page_state_snapshot(struct zone *zone,
219 enum zone_stat_item item)
221 long x = atomic_long_read(&zone->vm_stat[item]);
225 for_each_online_cpu(cpu)
226 x += per_cpu_ptr(zone->per_cpu_zonestats, cpu)->vm_stat_diff[item];
235 /* See __count_vm_event comment on why raw_cpu_inc is used. */
237 __count_numa_event(struct zone *zone, enum numa_stat_item item)
239 struct per_cpu_zonestat __percpu *pzstats = zone->per_cpu_zonestats;
241 raw_cpu_inc(pzstats->vm_numa_event[item]);
245 __count_numa_events(struct zone *zone, enum numa_stat_item item, long delta)
247 struct per_cpu_zonestat __percpu *pzstats = zone->per_cpu_zonestats;
249 raw_cpu_add(pzstats->vm_numa_event[item], delta);
252 extern unsigned long sum_zone_node_page_state(int node,
253 enum zone_stat_item item);
254 extern unsigned long sum_zone_numa_event_state(int node, enum numa_stat_item item);
255 extern unsigned long node_page_state(struct pglist_data *pgdat,
256 enum node_stat_item item);
257 extern unsigned long node_page_state_pages(struct pglist_data *pgdat,
258 enum node_stat_item item);
259 extern void fold_vm_numa_events(void);
261 #define sum_zone_node_page_state(node, item) global_zone_page_state(item)
262 #define node_page_state(node, item) global_node_page_state(item)
263 #define node_page_state_pages(node, item) global_node_page_state_pages(item)
264 static inline void fold_vm_numa_events(void)
267 #endif /* CONFIG_NUMA */
270 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, long);
271 void __inc_zone_page_state(struct page *, enum zone_stat_item);
272 void __dec_zone_page_state(struct page *, enum zone_stat_item);
274 void __mod_node_page_state(struct pglist_data *, enum node_stat_item item, long);
275 void __inc_node_page_state(struct page *, enum node_stat_item);
276 void __dec_node_page_state(struct page *, enum node_stat_item);
278 void mod_zone_page_state(struct zone *, enum zone_stat_item, long);
279 void inc_zone_page_state(struct page *, enum zone_stat_item);
280 void dec_zone_page_state(struct page *, enum zone_stat_item);
282 void mod_node_page_state(struct pglist_data *, enum node_stat_item, long);
283 void inc_node_page_state(struct page *, enum node_stat_item);
284 void dec_node_page_state(struct page *, enum node_stat_item);
286 extern void inc_node_state(struct pglist_data *, enum node_stat_item);
287 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
288 extern void __inc_node_state(struct pglist_data *, enum node_stat_item);
289 extern void dec_zone_state(struct zone *, enum zone_stat_item);
290 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
291 extern void __dec_node_state(struct pglist_data *, enum node_stat_item);
293 void quiet_vmstat(void);
294 void cpu_vm_stats_fold(int cpu);
295 void refresh_zone_stat_thresholds(void);
298 int vmstat_refresh(struct ctl_table *, int write, void *buffer, size_t *lenp,
301 void drain_zonestat(struct zone *zone, struct per_cpu_zonestat *);
303 int calculate_pressure_threshold(struct zone *zone);
304 int calculate_normal_threshold(struct zone *zone);
305 void set_pgdat_percpu_threshold(pg_data_t *pgdat,
306 int (*calculate_pressure)(struct zone *));
307 #else /* CONFIG_SMP */
310 * We do not maintain differentials in a single processor configuration.
311 * The functions directly modify the zone and global counters.
313 static inline void __mod_zone_page_state(struct zone *zone,
314 enum zone_stat_item item, long delta)
316 zone_page_state_add(delta, zone, item);
319 static inline void __mod_node_page_state(struct pglist_data *pgdat,
320 enum node_stat_item item, int delta)
322 if (vmstat_item_in_bytes(item)) {
324 * Only cgroups use subpage accounting right now; at
325 * the global level, these items still change in
326 * multiples of whole pages. Store them as pages
327 * internally to keep the per-cpu counters compact.
329 VM_WARN_ON_ONCE(delta & (PAGE_SIZE - 1));
330 delta >>= PAGE_SHIFT;
333 node_page_state_add(delta, pgdat, item);
336 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
338 atomic_long_inc(&zone->vm_stat[item]);
339 atomic_long_inc(&vm_zone_stat[item]);
342 static inline void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
344 atomic_long_inc(&pgdat->vm_stat[item]);
345 atomic_long_inc(&vm_node_stat[item]);
348 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
350 atomic_long_dec(&zone->vm_stat[item]);
351 atomic_long_dec(&vm_zone_stat[item]);
354 static inline void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
356 atomic_long_dec(&pgdat->vm_stat[item]);
357 atomic_long_dec(&vm_node_stat[item]);
360 static inline void __inc_zone_page_state(struct page *page,
361 enum zone_stat_item item)
363 __inc_zone_state(page_zone(page), item);
366 static inline void __inc_node_page_state(struct page *page,
367 enum node_stat_item item)
369 __inc_node_state(page_pgdat(page), item);
373 static inline void __dec_zone_page_state(struct page *page,
374 enum zone_stat_item item)
376 __dec_zone_state(page_zone(page), item);
379 static inline void __dec_node_page_state(struct page *page,
380 enum node_stat_item item)
382 __dec_node_state(page_pgdat(page), item);
387 * We only use atomic operations to update counters. So there is no need to
388 * disable interrupts.
390 #define inc_zone_page_state __inc_zone_page_state
391 #define dec_zone_page_state __dec_zone_page_state
392 #define mod_zone_page_state __mod_zone_page_state
394 #define inc_node_page_state __inc_node_page_state
395 #define dec_node_page_state __dec_node_page_state
396 #define mod_node_page_state __mod_node_page_state
398 #define inc_zone_state __inc_zone_state
399 #define inc_node_state __inc_node_state
400 #define dec_zone_state __dec_zone_state
402 #define set_pgdat_percpu_threshold(pgdat, callback) { }
404 static inline void refresh_zone_stat_thresholds(void) { }
405 static inline void cpu_vm_stats_fold(int cpu) { }
406 static inline void quiet_vmstat(void) { }
408 static inline void drain_zonestat(struct zone *zone,
409 struct per_cpu_zonestat *pzstats) { }
410 #endif /* CONFIG_SMP */
412 static inline void __zone_stat_mod_folio(struct folio *folio,
413 enum zone_stat_item item, long nr)
415 __mod_zone_page_state(folio_zone(folio), item, nr);
418 static inline void __zone_stat_add_folio(struct folio *folio,
419 enum zone_stat_item item)
421 __mod_zone_page_state(folio_zone(folio), item, folio_nr_pages(folio));
424 static inline void __zone_stat_sub_folio(struct folio *folio,
425 enum zone_stat_item item)
427 __mod_zone_page_state(folio_zone(folio), item, -folio_nr_pages(folio));
430 static inline void zone_stat_mod_folio(struct folio *folio,
431 enum zone_stat_item item, long nr)
433 mod_zone_page_state(folio_zone(folio), item, nr);
436 static inline void zone_stat_add_folio(struct folio *folio,
437 enum zone_stat_item item)
439 mod_zone_page_state(folio_zone(folio), item, folio_nr_pages(folio));
442 static inline void zone_stat_sub_folio(struct folio *folio,
443 enum zone_stat_item item)
445 mod_zone_page_state(folio_zone(folio), item, -folio_nr_pages(folio));
448 static inline void __node_stat_mod_folio(struct folio *folio,
449 enum node_stat_item item, long nr)
451 __mod_node_page_state(folio_pgdat(folio), item, nr);
454 static inline void __node_stat_add_folio(struct folio *folio,
455 enum node_stat_item item)
457 __mod_node_page_state(folio_pgdat(folio), item, folio_nr_pages(folio));
460 static inline void __node_stat_sub_folio(struct folio *folio,
461 enum node_stat_item item)
463 __mod_node_page_state(folio_pgdat(folio), item, -folio_nr_pages(folio));
466 static inline void node_stat_mod_folio(struct folio *folio,
467 enum node_stat_item item, long nr)
469 mod_node_page_state(folio_pgdat(folio), item, nr);
472 static inline void node_stat_add_folio(struct folio *folio,
473 enum node_stat_item item)
475 mod_node_page_state(folio_pgdat(folio), item, folio_nr_pages(folio));
478 static inline void node_stat_sub_folio(struct folio *folio,
479 enum node_stat_item item)
481 mod_node_page_state(folio_pgdat(folio), item, -folio_nr_pages(folio));
484 static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages,
487 __mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages);
488 if (is_migrate_cma(migratetype))
489 __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages);
492 extern const char * const vmstat_text[];
494 static inline const char *zone_stat_name(enum zone_stat_item item)
496 return vmstat_text[item];
500 static inline const char *numa_stat_name(enum numa_stat_item item)
502 return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
505 #endif /* CONFIG_NUMA */
507 static inline const char *node_stat_name(enum node_stat_item item)
509 return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
510 NR_VM_NUMA_EVENT_ITEMS +
514 static inline const char *lru_list_name(enum lru_list lru)
516 return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
519 static inline const char *writeback_stat_name(enum writeback_stat_item item)
521 return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
522 NR_VM_NUMA_EVENT_ITEMS +
523 NR_VM_NODE_STAT_ITEMS +
527 #if defined(CONFIG_VM_EVENT_COUNTERS) || defined(CONFIG_MEMCG)
528 static inline const char *vm_event_name(enum vm_event_item item)
530 return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
531 NR_VM_NUMA_EVENT_ITEMS +
532 NR_VM_NODE_STAT_ITEMS +
533 NR_VM_WRITEBACK_STAT_ITEMS +
536 #endif /* CONFIG_VM_EVENT_COUNTERS || CONFIG_MEMCG */
540 void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx,
543 static inline void mod_lruvec_state(struct lruvec *lruvec,
544 enum node_stat_item idx, int val)
548 local_irq_save(flags);
549 __mod_lruvec_state(lruvec, idx, val);
550 local_irq_restore(flags);
553 void __mod_lruvec_page_state(struct page *page,
554 enum node_stat_item idx, int val);
556 static inline void mod_lruvec_page_state(struct page *page,
557 enum node_stat_item idx, int val)
561 local_irq_save(flags);
562 __mod_lruvec_page_state(page, idx, val);
563 local_irq_restore(flags);
568 static inline void __mod_lruvec_state(struct lruvec *lruvec,
569 enum node_stat_item idx, int val)
571 __mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
574 static inline void mod_lruvec_state(struct lruvec *lruvec,
575 enum node_stat_item idx, int val)
577 mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
580 static inline void __mod_lruvec_page_state(struct page *page,
581 enum node_stat_item idx, int val)
583 __mod_node_page_state(page_pgdat(page), idx, val);
586 static inline void mod_lruvec_page_state(struct page *page,
587 enum node_stat_item idx, int val)
589 mod_node_page_state(page_pgdat(page), idx, val);
592 #endif /* CONFIG_MEMCG */
594 static inline void __inc_lruvec_page_state(struct page *page,
595 enum node_stat_item idx)
597 __mod_lruvec_page_state(page, idx, 1);
600 static inline void __dec_lruvec_page_state(struct page *page,
601 enum node_stat_item idx)
603 __mod_lruvec_page_state(page, idx, -1);
606 static inline void __lruvec_stat_mod_folio(struct folio *folio,
607 enum node_stat_item idx, int val)
609 __mod_lruvec_page_state(&folio->page, idx, val);
612 static inline void __lruvec_stat_add_folio(struct folio *folio,
613 enum node_stat_item idx)
615 __lruvec_stat_mod_folio(folio, idx, folio_nr_pages(folio));
618 static inline void __lruvec_stat_sub_folio(struct folio *folio,
619 enum node_stat_item idx)
621 __lruvec_stat_mod_folio(folio, idx, -folio_nr_pages(folio));
624 static inline void inc_lruvec_page_state(struct page *page,
625 enum node_stat_item idx)
627 mod_lruvec_page_state(page, idx, 1);
630 static inline void dec_lruvec_page_state(struct page *page,
631 enum node_stat_item idx)
633 mod_lruvec_page_state(page, idx, -1);
636 static inline void lruvec_stat_mod_folio(struct folio *folio,
637 enum node_stat_item idx, int val)
639 mod_lruvec_page_state(&folio->page, idx, val);
642 static inline void lruvec_stat_add_folio(struct folio *folio,
643 enum node_stat_item idx)
645 lruvec_stat_mod_folio(folio, idx, folio_nr_pages(folio));
648 static inline void lruvec_stat_sub_folio(struct folio *folio,
649 enum node_stat_item idx)
651 lruvec_stat_mod_folio(folio, idx, -folio_nr_pages(folio));
653 #endif /* _LINUX_VMSTAT_H */