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