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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f6ac2354 CL |
2 | #ifndef _LINUX_VMSTAT_H |
3 | #define _LINUX_VMSTAT_H | |
4 | ||
5 | #include <linux/types.h> | |
6 | #include <linux/percpu.h> | |
2244b95a | 7 | #include <linux/mmzone.h> |
f042e707 | 8 | #include <linux/vm_event_item.h> |
60063497 | 9 | #include <linux/atomic.h> |
4518085e | 10 | #include <linux/static_key.h> |
f6ac2354 | 11 | |
c748e134 AB |
12 | extern int sysctl_stat_interval; |
13 | ||
4518085e KW |
14 | #ifdef CONFIG_NUMA |
15 | #define ENABLE_NUMA_STAT 1 | |
16 | #define DISABLE_NUMA_STAT 0 | |
17 | extern int sysctl_vm_numa_stat; | |
18 | DECLARE_STATIC_KEY_TRUE(vm_numa_stat_key); | |
19 | extern int sysctl_vm_numa_stat_handler(struct ctl_table *table, | |
20 | int write, void __user *buffer, size_t *length, loff_t *ppos); | |
21 | #endif | |
22 | ||
780a0656 AM |
23 | #ifdef CONFIG_VM_EVENT_COUNTERS |
24 | /* | |
25 | * Light weight per cpu counter implementation. | |
26 | * | |
27 | * Counters should only be incremented and no critical kernel component | |
28 | * should rely on the counter values. | |
29 | * | |
30 | * Counters are handled completely inline. On many platforms the code | |
31 | * generated will simply be the increment of a global address. | |
32 | */ | |
33 | ||
f8891e5e CL |
34 | struct vm_event_state { |
35 | unsigned long event[NR_VM_EVENT_ITEMS]; | |
f6ac2354 CL |
36 | }; |
37 | ||
f8891e5e CL |
38 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
39 | ||
293b6a4c CL |
40 | /* |
41 | * vm counters are allowed to be racy. Use raw_cpu_ops to avoid the | |
42 | * local_irq_disable overhead. | |
43 | */ | |
f8891e5e CL |
44 | static inline void __count_vm_event(enum vm_event_item item) |
45 | { | |
293b6a4c | 46 | raw_cpu_inc(vm_event_states.event[item]); |
f8891e5e CL |
47 | } |
48 | ||
49 | static inline void count_vm_event(enum vm_event_item item) | |
50 | { | |
dd17c8f7 | 51 | this_cpu_inc(vm_event_states.event[item]); |
f8891e5e CL |
52 | } |
53 | ||
54 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
55 | { | |
293b6a4c | 56 | raw_cpu_add(vm_event_states.event[item], delta); |
f8891e5e CL |
57 | } |
58 | ||
59 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
60 | { | |
dd17c8f7 | 61 | this_cpu_add(vm_event_states.event[item], delta); |
f8891e5e CL |
62 | } |
63 | ||
64 | extern void all_vm_events(unsigned long *); | |
f1cb0879 | 65 | |
f8891e5e CL |
66 | extern void vm_events_fold_cpu(int cpu); |
67 | ||
68 | #else | |
69 | ||
70 | /* Disable counters */ | |
780a0656 AM |
71 | static inline void count_vm_event(enum vm_event_item item) |
72 | { | |
73 | } | |
74 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
75 | { | |
76 | } | |
77 | static inline void __count_vm_event(enum vm_event_item item) | |
78 | { | |
79 | } | |
80 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
81 | { | |
82 | } | |
83 | static inline void all_vm_events(unsigned long *ret) | |
84 | { | |
85 | } | |
86 | static inline void vm_events_fold_cpu(int cpu) | |
87 | { | |
88 | } | |
f8891e5e CL |
89 | |
90 | #endif /* CONFIG_VM_EVENT_COUNTERS */ | |
91 | ||
03c5a6e1 MG |
92 | #ifdef CONFIG_NUMA_BALANCING |
93 | #define count_vm_numa_event(x) count_vm_event(x) | |
94 | #define count_vm_numa_events(x, y) count_vm_events(x, y) | |
95 | #else | |
96 | #define count_vm_numa_event(x) do {} while (0) | |
3c0ff468 | 97 | #define count_vm_numa_events(x, y) do { (void)(y); } while (0) |
03c5a6e1 MG |
98 | #endif /* CONFIG_NUMA_BALANCING */ |
99 | ||
ec659934 MG |
100 | #ifdef CONFIG_DEBUG_TLBFLUSH |
101 | #define count_vm_tlb_event(x) count_vm_event(x) | |
102 | #define count_vm_tlb_events(x, y) count_vm_events(x, y) | |
103 | #else | |
104 | #define count_vm_tlb_event(x) do {} while (0) | |
105 | #define count_vm_tlb_events(x, y) do { (void)(y); } while (0) | |
106 | #endif | |
107 | ||
4f115147 DB |
108 | #ifdef CONFIG_DEBUG_VM_VMACACHE |
109 | #define count_vm_vmacache_event(x) count_vm_event(x) | |
110 | #else | |
111 | #define count_vm_vmacache_event(x) do {} while (0) | |
112 | #endif | |
113 | ||
16709d1d MG |
114 | #define __count_zid_vm_events(item, zid, delta) \ |
115 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta) | |
f6ac2354 | 116 | |
2244b95a | 117 | /* |
75ef7184 | 118 | * Zone and node-based page accounting with per cpu differentials. |
2244b95a | 119 | */ |
75ef7184 | 120 | extern atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS]; |
3a321d2a | 121 | extern atomic_long_t vm_numa_stat[NR_VM_NUMA_STAT_ITEMS]; |
75ef7184 | 122 | extern atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS]; |
2244b95a | 123 | |
3a321d2a KW |
124 | #ifdef CONFIG_NUMA |
125 | static inline void zone_numa_state_add(long x, struct zone *zone, | |
126 | enum numa_stat_item item) | |
127 | { | |
128 | atomic_long_add(x, &zone->vm_numa_stat[item]); | |
129 | atomic_long_add(x, &vm_numa_stat[item]); | |
130 | } | |
131 | ||
132 | static inline unsigned long global_numa_state(enum numa_stat_item item) | |
133 | { | |
134 | long x = atomic_long_read(&vm_numa_stat[item]); | |
135 | ||
136 | return x; | |
137 | } | |
138 | ||
63803222 | 139 | static inline unsigned long zone_numa_state_snapshot(struct zone *zone, |
3a321d2a KW |
140 | enum numa_stat_item item) |
141 | { | |
142 | long x = atomic_long_read(&zone->vm_numa_stat[item]); | |
63803222 KW |
143 | int cpu; |
144 | ||
145 | for_each_online_cpu(cpu) | |
146 | x += per_cpu_ptr(zone->pageset, cpu)->vm_numa_stat_diff[item]; | |
3a321d2a KW |
147 | |
148 | return x; | |
149 | } | |
150 | #endif /* CONFIG_NUMA */ | |
151 | ||
2244b95a CL |
152 | static inline void zone_page_state_add(long x, struct zone *zone, |
153 | enum zone_stat_item item) | |
154 | { | |
155 | atomic_long_add(x, &zone->vm_stat[item]); | |
75ef7184 MG |
156 | atomic_long_add(x, &vm_zone_stat[item]); |
157 | } | |
158 | ||
159 | static inline void node_page_state_add(long x, struct pglist_data *pgdat, | |
160 | enum node_stat_item item) | |
161 | { | |
162 | atomic_long_add(x, &pgdat->vm_stat[item]); | |
163 | atomic_long_add(x, &vm_node_stat[item]); | |
2244b95a CL |
164 | } |
165 | ||
c41f012a | 166 | static inline unsigned long global_zone_page_state(enum zone_stat_item item) |
2244b95a | 167 | { |
75ef7184 MG |
168 | long x = atomic_long_read(&vm_zone_stat[item]); |
169 | #ifdef CONFIG_SMP | |
170 | if (x < 0) | |
171 | x = 0; | |
172 | #endif | |
173 | return x; | |
174 | } | |
175 | ||
176 | static inline unsigned long global_node_page_state(enum node_stat_item item) | |
177 | { | |
178 | long x = atomic_long_read(&vm_node_stat[item]); | |
2244b95a CL |
179 | #ifdef CONFIG_SMP |
180 | if (x < 0) | |
181 | x = 0; | |
182 | #endif | |
183 | return x; | |
184 | } | |
185 | ||
186 | static inline unsigned long zone_page_state(struct zone *zone, | |
187 | enum zone_stat_item item) | |
188 | { | |
189 | long x = atomic_long_read(&zone->vm_stat[item]); | |
190 | #ifdef CONFIG_SMP | |
191 | if (x < 0) | |
192 | x = 0; | |
193 | #endif | |
194 | return x; | |
195 | } | |
196 | ||
aa454840 CL |
197 | /* |
198 | * More accurate version that also considers the currently pending | |
199 | * deltas. For that we need to loop over all cpus to find the current | |
200 | * deltas. There is no synchronization so the result cannot be | |
201 | * exactly accurate either. | |
202 | */ | |
203 | static inline unsigned long zone_page_state_snapshot(struct zone *zone, | |
204 | enum zone_stat_item item) | |
205 | { | |
206 | long x = atomic_long_read(&zone->vm_stat[item]); | |
207 | ||
208 | #ifdef CONFIG_SMP | |
209 | int cpu; | |
210 | for_each_online_cpu(cpu) | |
211 | x += per_cpu_ptr(zone->pageset, cpu)->vm_stat_diff[item]; | |
212 | ||
213 | if (x < 0) | |
214 | x = 0; | |
215 | #endif | |
216 | return x; | |
217 | } | |
218 | ||
599d0c95 MG |
219 | static inline unsigned long node_page_state_snapshot(pg_data_t *pgdat, |
220 | enum node_stat_item item) | |
221 | { | |
222 | long x = atomic_long_read(&pgdat->vm_stat[item]); | |
223 | ||
224 | #ifdef CONFIG_SMP | |
225 | int cpu; | |
226 | for_each_online_cpu(cpu) | |
227 | x += per_cpu_ptr(pgdat->per_cpu_nodestats, cpu)->vm_node_stat_diff[item]; | |
228 | ||
229 | if (x < 0) | |
230 | x = 0; | |
231 | #endif | |
232 | return x; | |
233 | } | |
234 | ||
235 | ||
2244b95a | 236 | #ifdef CONFIG_NUMA |
3a321d2a | 237 | extern void __inc_numa_state(struct zone *zone, enum numa_stat_item item); |
75ef7184 | 238 | extern unsigned long sum_zone_node_page_state(int node, |
3a321d2a KW |
239 | enum zone_stat_item item); |
240 | extern unsigned long sum_zone_numa_state(int node, enum numa_stat_item item); | |
75ef7184 MG |
241 | extern unsigned long node_page_state(struct pglist_data *pgdat, |
242 | enum node_stat_item item); | |
2244b95a | 243 | #else |
c41f012a | 244 | #define sum_zone_node_page_state(node, item) global_zone_page_state(item) |
75ef7184 | 245 | #define node_page_state(node, item) global_node_page_state(item) |
ca889e6c | 246 | #endif /* CONFIG_NUMA */ |
2244b95a | 247 | |
2244b95a CL |
248 | #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d) |
249 | #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d)) | |
75ef7184 MG |
250 | #define add_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, __d) |
251 | #define sub_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, -(__d)) | |
2244b95a | 252 | |
2244b95a | 253 | #ifdef CONFIG_SMP |
6cdb18ad | 254 | void __mod_zone_page_state(struct zone *, enum zone_stat_item item, long); |
2244b95a CL |
255 | void __inc_zone_page_state(struct page *, enum zone_stat_item); |
256 | void __dec_zone_page_state(struct page *, enum zone_stat_item); | |
f6ac2354 | 257 | |
75ef7184 MG |
258 | void __mod_node_page_state(struct pglist_data *, enum node_stat_item item, long); |
259 | void __inc_node_page_state(struct page *, enum node_stat_item); | |
260 | void __dec_node_page_state(struct page *, enum node_stat_item); | |
261 | ||
6cdb18ad | 262 | void mod_zone_page_state(struct zone *, enum zone_stat_item, long); |
2244b95a CL |
263 | void inc_zone_page_state(struct page *, enum zone_stat_item); |
264 | void dec_zone_page_state(struct page *, enum zone_stat_item); | |
265 | ||
75ef7184 MG |
266 | void mod_node_page_state(struct pglist_data *, enum node_stat_item, long); |
267 | void inc_node_page_state(struct page *, enum node_stat_item); | |
268 | void dec_node_page_state(struct page *, enum node_stat_item); | |
269 | ||
75ef7184 | 270 | extern void inc_node_state(struct pglist_data *, enum node_stat_item); |
c8785385 | 271 | extern void __inc_zone_state(struct zone *, enum zone_stat_item); |
75ef7184 | 272 | extern void __inc_node_state(struct pglist_data *, enum node_stat_item); |
c8785385 CL |
273 | extern void dec_zone_state(struct zone *, enum zone_stat_item); |
274 | extern void __dec_zone_state(struct zone *, enum zone_stat_item); | |
75ef7184 | 275 | extern void __dec_node_state(struct pglist_data *, enum node_stat_item); |
2244b95a | 276 | |
0eb77e98 | 277 | void quiet_vmstat(void); |
2bb921e5 | 278 | void cpu_vm_stats_fold(int cpu); |
a6cccdc3 | 279 | void refresh_zone_stat_thresholds(void); |
b44129b3 | 280 | |
52b6f46b HD |
281 | struct ctl_table; |
282 | int vmstat_refresh(struct ctl_table *, int write, | |
283 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
284 | ||
5a883813 MK |
285 | void drain_zonestat(struct zone *zone, struct per_cpu_pageset *); |
286 | ||
b44129b3 MG |
287 | int calculate_pressure_threshold(struct zone *zone); |
288 | int calculate_normal_threshold(struct zone *zone); | |
289 | void set_pgdat_percpu_threshold(pg_data_t *pgdat, | |
290 | int (*calculate_pressure)(struct zone *)); | |
2244b95a CL |
291 | #else /* CONFIG_SMP */ |
292 | ||
293 | /* | |
294 | * We do not maintain differentials in a single processor configuration. | |
295 | * The functions directly modify the zone and global counters. | |
296 | */ | |
297 | static inline void __mod_zone_page_state(struct zone *zone, | |
6cdb18ad | 298 | enum zone_stat_item item, long delta) |
2244b95a CL |
299 | { |
300 | zone_page_state_add(delta, zone, item); | |
301 | } | |
302 | ||
75ef7184 MG |
303 | static inline void __mod_node_page_state(struct pglist_data *pgdat, |
304 | enum node_stat_item item, int delta) | |
305 | { | |
306 | node_page_state_add(delta, pgdat, item); | |
307 | } | |
308 | ||
7f4599e9 CL |
309 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
310 | { | |
311 | atomic_long_inc(&zone->vm_stat[item]); | |
75ef7184 MG |
312 | atomic_long_inc(&vm_zone_stat[item]); |
313 | } | |
314 | ||
315 | static inline void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item) | |
316 | { | |
317 | atomic_long_inc(&pgdat->vm_stat[item]); | |
318 | atomic_long_inc(&vm_node_stat[item]); | |
7f4599e9 CL |
319 | } |
320 | ||
c8785385 CL |
321 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
322 | { | |
323 | atomic_long_dec(&zone->vm_stat[item]); | |
75ef7184 MG |
324 | atomic_long_dec(&vm_zone_stat[item]); |
325 | } | |
326 | ||
327 | static inline void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item) | |
328 | { | |
329 | atomic_long_dec(&pgdat->vm_stat[item]); | |
330 | atomic_long_dec(&vm_node_stat[item]); | |
c8785385 CL |
331 | } |
332 | ||
6a3ed212 JW |
333 | static inline void __inc_zone_page_state(struct page *page, |
334 | enum zone_stat_item item) | |
335 | { | |
336 | __inc_zone_state(page_zone(page), item); | |
337 | } | |
338 | ||
75ef7184 MG |
339 | static inline void __inc_node_page_state(struct page *page, |
340 | enum node_stat_item item) | |
341 | { | |
342 | __inc_node_state(page_pgdat(page), item); | |
343 | } | |
344 | ||
345 | ||
2244b95a CL |
346 | static inline void __dec_zone_page_state(struct page *page, |
347 | enum zone_stat_item item) | |
348 | { | |
57ce36fe | 349 | __dec_zone_state(page_zone(page), item); |
2244b95a CL |
350 | } |
351 | ||
75ef7184 MG |
352 | static inline void __dec_node_page_state(struct page *page, |
353 | enum node_stat_item item) | |
354 | { | |
355 | __dec_node_state(page_pgdat(page), item); | |
356 | } | |
357 | ||
358 | ||
2244b95a CL |
359 | /* |
360 | * We only use atomic operations to update counters. So there is no need to | |
361 | * disable interrupts. | |
362 | */ | |
363 | #define inc_zone_page_state __inc_zone_page_state | |
364 | #define dec_zone_page_state __dec_zone_page_state | |
365 | #define mod_zone_page_state __mod_zone_page_state | |
366 | ||
75ef7184 MG |
367 | #define inc_node_page_state __inc_node_page_state |
368 | #define dec_node_page_state __dec_node_page_state | |
369 | #define mod_node_page_state __mod_node_page_state | |
370 | ||
6a3ed212 | 371 | #define inc_zone_state __inc_zone_state |
75ef7184 | 372 | #define inc_node_state __inc_node_state |
6a3ed212 JW |
373 | #define dec_zone_state __dec_zone_state |
374 | ||
b44129b3 | 375 | #define set_pgdat_percpu_threshold(pgdat, callback) { } |
88f5acf8 | 376 | |
a6cccdc3 | 377 | static inline void refresh_zone_stat_thresholds(void) { } |
2bb921e5 | 378 | static inline void cpu_vm_stats_fold(int cpu) { } |
0eb77e98 | 379 | static inline void quiet_vmstat(void) { } |
a6cccdc3 | 380 | |
5a883813 MK |
381 | static inline void drain_zonestat(struct zone *zone, |
382 | struct per_cpu_pageset *pset) { } | |
fa25c503 KM |
383 | #endif /* CONFIG_SMP */ |
384 | ||
d1ce749a BZ |
385 | static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages, |
386 | int migratetype) | |
387 | { | |
388 | __mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages); | |
389 | if (is_migrate_cma(migratetype)) | |
390 | __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages); | |
391 | } | |
392 | ||
fa25c503 | 393 | extern const char * const vmstat_text[]; |
2244b95a CL |
394 | |
395 | #endif /* _LINUX_VMSTAT_H */ |