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 #ifdef CONFIG_DEBUG_VM_VMACACHE
129 #define count_vm_vmacache_event(x) count_vm_event(x)
131 #define count_vm_vmacache_event(x) do {} while (0)
134 #define __count_zid_vm_events(item, zid, delta) \
135 __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
138 * Zone and node-based page accounting with per cpu differentials.
140 extern atomic_long_t vm_zone_stat
[NR_VM_ZONE_STAT_ITEMS
];
141 extern atomic_long_t vm_numa_stat
[NR_VM_NUMA_STAT_ITEMS
];
142 extern atomic_long_t vm_node_stat
[NR_VM_NODE_STAT_ITEMS
];
145 static inline void zone_numa_state_add(long x
, struct zone
*zone
,
146 enum numa_stat_item item
)
148 atomic_long_add(x
, &zone
->vm_numa_stat
[item
]);
149 atomic_long_add(x
, &vm_numa_stat
[item
]);
152 static inline unsigned long global_numa_state(enum numa_stat_item item
)
154 long x
= atomic_long_read(&vm_numa_stat
[item
]);
159 static inline unsigned long zone_numa_state_snapshot(struct zone
*zone
,
160 enum numa_stat_item item
)
162 long x
= atomic_long_read(&zone
->vm_numa_stat
[item
]);
165 for_each_online_cpu(cpu
)
166 x
+= per_cpu_ptr(zone
->pageset
, cpu
)->vm_numa_stat_diff
[item
];
170 #endif /* CONFIG_NUMA */
172 static inline void zone_page_state_add(long x
, struct zone
*zone
,
173 enum zone_stat_item item
)
175 atomic_long_add(x
, &zone
->vm_stat
[item
]);
176 atomic_long_add(x
, &vm_zone_stat
[item
]);
179 static inline void node_page_state_add(long x
, struct pglist_data
*pgdat
,
180 enum node_stat_item item
)
182 atomic_long_add(x
, &pgdat
->vm_stat
[item
]);
183 atomic_long_add(x
, &vm_node_stat
[item
]);
186 static inline unsigned long global_zone_page_state(enum zone_stat_item item
)
188 long x
= atomic_long_read(&vm_zone_stat
[item
]);
197 unsigned long global_node_page_state_pages(enum node_stat_item item
)
199 long x
= atomic_long_read(&vm_node_stat
[item
]);
207 static inline unsigned long global_node_page_state(enum node_stat_item item
)
209 VM_WARN_ON_ONCE(vmstat_item_in_bytes(item
));
211 return global_node_page_state_pages(item
);
214 static inline unsigned long zone_page_state(struct zone
*zone
,
215 enum zone_stat_item item
)
217 long x
= atomic_long_read(&zone
->vm_stat
[item
]);
226 * More accurate version that also considers the currently pending
227 * deltas. For that we need to loop over all cpus to find the current
228 * deltas. There is no synchronization so the result cannot be
229 * exactly accurate either.
231 static inline unsigned long zone_page_state_snapshot(struct zone
*zone
,
232 enum zone_stat_item item
)
234 long x
= atomic_long_read(&zone
->vm_stat
[item
]);
238 for_each_online_cpu(cpu
)
239 x
+= per_cpu_ptr(zone
->pageset
, cpu
)->vm_stat_diff
[item
];
248 extern void __inc_numa_state(struct zone
*zone
, enum numa_stat_item item
);
249 extern unsigned long sum_zone_node_page_state(int node
,
250 enum zone_stat_item item
);
251 extern unsigned long sum_zone_numa_state(int node
, enum numa_stat_item item
);
252 extern unsigned long node_page_state(struct pglist_data
*pgdat
,
253 enum node_stat_item item
);
254 extern unsigned long node_page_state_pages(struct pglist_data
*pgdat
,
255 enum node_stat_item item
);
257 #define sum_zone_node_page_state(node, item) global_zone_page_state(item)
258 #define node_page_state(node, item) global_node_page_state(item)
259 #define node_page_state_pages(node, item) global_node_page_state_pages(item)
260 #endif /* CONFIG_NUMA */
263 void __mod_zone_page_state(struct zone
*, enum zone_stat_item item
, long);
264 void __inc_zone_page_state(struct page
*, enum zone_stat_item
);
265 void __dec_zone_page_state(struct page
*, enum zone_stat_item
);
267 void __mod_node_page_state(struct pglist_data
*, enum node_stat_item item
, long);
268 void __inc_node_page_state(struct page
*, enum node_stat_item
);
269 void __dec_node_page_state(struct page
*, enum node_stat_item
);
271 void mod_zone_page_state(struct zone
*, enum zone_stat_item
, long);
272 void inc_zone_page_state(struct page
*, enum zone_stat_item
);
273 void dec_zone_page_state(struct page
*, enum zone_stat_item
);
275 void mod_node_page_state(struct pglist_data
*, enum node_stat_item
, long);
276 void inc_node_page_state(struct page
*, enum node_stat_item
);
277 void dec_node_page_state(struct page
*, enum node_stat_item
);
279 extern void inc_node_state(struct pglist_data
*, enum node_stat_item
);
280 extern void __inc_zone_state(struct zone
*, enum zone_stat_item
);
281 extern void __inc_node_state(struct pglist_data
*, enum node_stat_item
);
282 extern void dec_zone_state(struct zone
*, enum zone_stat_item
);
283 extern void __dec_zone_state(struct zone
*, enum zone_stat_item
);
284 extern void __dec_node_state(struct pglist_data
*, enum node_stat_item
);
286 void quiet_vmstat(void);
287 void cpu_vm_stats_fold(int cpu
);
288 void refresh_zone_stat_thresholds(void);
291 int vmstat_refresh(struct ctl_table
*, int write
, void *buffer
, size_t *lenp
,
294 void drain_zonestat(struct zone
*zone
, struct per_cpu_pageset
*);
296 int calculate_pressure_threshold(struct zone
*zone
);
297 int calculate_normal_threshold(struct zone
*zone
);
298 void set_pgdat_percpu_threshold(pg_data_t
*pgdat
,
299 int (*calculate_pressure
)(struct zone
*));
300 #else /* CONFIG_SMP */
303 * We do not maintain differentials in a single processor configuration.
304 * The functions directly modify the zone and global counters.
306 static inline void __mod_zone_page_state(struct zone
*zone
,
307 enum zone_stat_item item
, long delta
)
309 zone_page_state_add(delta
, zone
, item
);
312 static inline void __mod_node_page_state(struct pglist_data
*pgdat
,
313 enum node_stat_item item
, int delta
)
315 if (vmstat_item_in_bytes(item
)) {
317 * Only cgroups use subpage accounting right now; at
318 * the global level, these items still change in
319 * multiples of whole pages. Store them as pages
320 * internally to keep the per-cpu counters compact.
322 VM_WARN_ON_ONCE(delta
& (PAGE_SIZE
- 1));
323 delta
>>= PAGE_SHIFT
;
326 node_page_state_add(delta
, pgdat
, item
);
329 static inline void __inc_zone_state(struct zone
*zone
, enum zone_stat_item item
)
331 atomic_long_inc(&zone
->vm_stat
[item
]);
332 atomic_long_inc(&vm_zone_stat
[item
]);
335 static inline void __inc_node_state(struct pglist_data
*pgdat
, enum node_stat_item item
)
337 atomic_long_inc(&pgdat
->vm_stat
[item
]);
338 atomic_long_inc(&vm_node_stat
[item
]);
341 static inline void __dec_zone_state(struct zone
*zone
, enum zone_stat_item item
)
343 atomic_long_dec(&zone
->vm_stat
[item
]);
344 atomic_long_dec(&vm_zone_stat
[item
]);
347 static inline void __dec_node_state(struct pglist_data
*pgdat
, enum node_stat_item item
)
349 atomic_long_dec(&pgdat
->vm_stat
[item
]);
350 atomic_long_dec(&vm_node_stat
[item
]);
353 static inline void __inc_zone_page_state(struct page
*page
,
354 enum zone_stat_item item
)
356 __inc_zone_state(page_zone(page
), item
);
359 static inline void __inc_node_page_state(struct page
*page
,
360 enum node_stat_item item
)
362 __inc_node_state(page_pgdat(page
), item
);
366 static inline void __dec_zone_page_state(struct page
*page
,
367 enum zone_stat_item item
)
369 __dec_zone_state(page_zone(page
), item
);
372 static inline void __dec_node_page_state(struct page
*page
,
373 enum node_stat_item item
)
375 __dec_node_state(page_pgdat(page
), item
);
380 * We only use atomic operations to update counters. So there is no need to
381 * disable interrupts.
383 #define inc_zone_page_state __inc_zone_page_state
384 #define dec_zone_page_state __dec_zone_page_state
385 #define mod_zone_page_state __mod_zone_page_state
387 #define inc_node_page_state __inc_node_page_state
388 #define dec_node_page_state __dec_node_page_state
389 #define mod_node_page_state __mod_node_page_state
391 #define inc_zone_state __inc_zone_state
392 #define inc_node_state __inc_node_state
393 #define dec_zone_state __dec_zone_state
395 #define set_pgdat_percpu_threshold(pgdat, callback) { }
397 static inline void refresh_zone_stat_thresholds(void) { }
398 static inline void cpu_vm_stats_fold(int cpu
) { }
399 static inline void quiet_vmstat(void) { }
401 static inline void drain_zonestat(struct zone
*zone
,
402 struct per_cpu_pageset
*pset
) { }
403 #endif /* CONFIG_SMP */
405 static inline void __mod_zone_freepage_state(struct zone
*zone
, int nr_pages
,
408 __mod_zone_page_state(zone
, NR_FREE_PAGES
, nr_pages
);
409 if (is_migrate_cma(migratetype
))
410 __mod_zone_page_state(zone
, NR_FREE_CMA_PAGES
, nr_pages
);
413 extern const char * const vmstat_text
[];
415 static inline const char *zone_stat_name(enum zone_stat_item item
)
417 return vmstat_text
[item
];
421 static inline const char *numa_stat_name(enum numa_stat_item item
)
423 return vmstat_text
[NR_VM_ZONE_STAT_ITEMS
+
426 #endif /* CONFIG_NUMA */
428 static inline const char *node_stat_name(enum node_stat_item item
)
430 return vmstat_text
[NR_VM_ZONE_STAT_ITEMS
+
431 NR_VM_NUMA_STAT_ITEMS
+
435 static inline const char *lru_list_name(enum lru_list lru
)
437 return node_stat_name(NR_LRU_BASE
+ lru
) + 3; // skip "nr_"
440 static inline const char *writeback_stat_name(enum writeback_stat_item item
)
442 return vmstat_text
[NR_VM_ZONE_STAT_ITEMS
+
443 NR_VM_NUMA_STAT_ITEMS
+
444 NR_VM_NODE_STAT_ITEMS
+
448 #if defined(CONFIG_VM_EVENT_COUNTERS) || defined(CONFIG_MEMCG)
449 static inline const char *vm_event_name(enum vm_event_item item
)
451 return vmstat_text
[NR_VM_ZONE_STAT_ITEMS
+
452 NR_VM_NUMA_STAT_ITEMS
+
453 NR_VM_NODE_STAT_ITEMS
+
454 NR_VM_WRITEBACK_STAT_ITEMS
+
457 #endif /* CONFIG_VM_EVENT_COUNTERS || CONFIG_MEMCG */
461 void __mod_lruvec_state(struct lruvec
*lruvec
, enum node_stat_item idx
,
464 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
465 enum node_stat_item idx
, int val
)
469 local_irq_save(flags
);
470 __mod_lruvec_state(lruvec
, idx
, val
);
471 local_irq_restore(flags
);
474 void __mod_lruvec_page_state(struct page
*page
,
475 enum node_stat_item idx
, int val
);
477 static inline void mod_lruvec_page_state(struct page
*page
,
478 enum node_stat_item idx
, int val
)
482 local_irq_save(flags
);
483 __mod_lruvec_page_state(page
, idx
, val
);
484 local_irq_restore(flags
);
489 static inline void __mod_lruvec_state(struct lruvec
*lruvec
,
490 enum node_stat_item idx
, int val
)
492 __mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
495 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
496 enum node_stat_item idx
, int val
)
498 mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
501 static inline void __mod_lruvec_page_state(struct page
*page
,
502 enum node_stat_item idx
, int val
)
504 __mod_node_page_state(page_pgdat(page
), idx
, val
);
507 static inline void mod_lruvec_page_state(struct page
*page
,
508 enum node_stat_item idx
, int val
)
510 mod_node_page_state(page_pgdat(page
), idx
, val
);
513 #endif /* CONFIG_MEMCG */
515 static inline void inc_lruvec_state(struct lruvec
*lruvec
,
516 enum node_stat_item idx
)
518 mod_lruvec_state(lruvec
, idx
, 1);
521 static inline void __inc_lruvec_page_state(struct page
*page
,
522 enum node_stat_item idx
)
524 __mod_lruvec_page_state(page
, idx
, 1);
527 static inline void __dec_lruvec_page_state(struct page
*page
,
528 enum node_stat_item idx
)
530 __mod_lruvec_page_state(page
, idx
, -1);
533 static inline void inc_lruvec_page_state(struct page
*page
,
534 enum node_stat_item idx
)
536 mod_lruvec_page_state(page
, idx
, 1);
539 static inline void dec_lruvec_page_state(struct page
*page
,
540 enum node_stat_item idx
)
542 mod_lruvec_page_state(page
, idx
, -1);
545 #endif /* _LINUX_VMSTAT_H */