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f6ac2354 CL |
1 | #ifndef _LINUX_VMSTAT_H |
2 | #define _LINUX_VMSTAT_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | #include <linux/percpu.h> | |
96177299 | 6 | #include <linux/mm.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 | ||
f8891e5e | 104 | #define __count_zone_vm_events(item, zone, delta) \ |
4b51d669 CL |
105 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ |
106 | zone_idx(zone), delta) | |
f6ac2354 | 107 | |
2244b95a | 108 | /* |
75ef7184 | 109 | * Zone and node-based page accounting with per cpu differentials. |
2244b95a | 110 | */ |
75ef7184 MG |
111 | extern atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS]; |
112 | extern atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS]; | |
2244b95a CL |
113 | |
114 | static inline void zone_page_state_add(long x, struct zone *zone, | |
115 | enum zone_stat_item item) | |
116 | { | |
117 | atomic_long_add(x, &zone->vm_stat[item]); | |
75ef7184 MG |
118 | atomic_long_add(x, &vm_zone_stat[item]); |
119 | } | |
120 | ||
121 | static inline void node_page_state_add(long x, struct pglist_data *pgdat, | |
122 | enum node_stat_item item) | |
123 | { | |
124 | atomic_long_add(x, &pgdat->vm_stat[item]); | |
125 | atomic_long_add(x, &vm_node_stat[item]); | |
2244b95a CL |
126 | } |
127 | ||
128 | static inline unsigned long global_page_state(enum zone_stat_item item) | |
129 | { | |
75ef7184 MG |
130 | long x = atomic_long_read(&vm_zone_stat[item]); |
131 | #ifdef CONFIG_SMP | |
132 | if (x < 0) | |
133 | x = 0; | |
134 | #endif | |
135 | return x; | |
136 | } | |
137 | ||
138 | static inline unsigned long global_node_page_state(enum node_stat_item item) | |
139 | { | |
140 | long x = atomic_long_read(&vm_node_stat[item]); | |
2244b95a CL |
141 | #ifdef CONFIG_SMP |
142 | if (x < 0) | |
143 | x = 0; | |
144 | #endif | |
145 | return x; | |
146 | } | |
147 | ||
148 | static inline unsigned long zone_page_state(struct zone *zone, | |
149 | enum zone_stat_item item) | |
150 | { | |
151 | long x = atomic_long_read(&zone->vm_stat[item]); | |
152 | #ifdef CONFIG_SMP | |
153 | if (x < 0) | |
154 | x = 0; | |
155 | #endif | |
156 | return x; | |
157 | } | |
158 | ||
aa454840 CL |
159 | /* |
160 | * More accurate version that also considers the currently pending | |
161 | * deltas. For that we need to loop over all cpus to find the current | |
162 | * deltas. There is no synchronization so the result cannot be | |
163 | * exactly accurate either. | |
164 | */ | |
165 | static inline unsigned long zone_page_state_snapshot(struct zone *zone, | |
166 | enum zone_stat_item item) | |
167 | { | |
168 | long x = atomic_long_read(&zone->vm_stat[item]); | |
169 | ||
170 | #ifdef CONFIG_SMP | |
171 | int cpu; | |
172 | for_each_online_cpu(cpu) | |
173 | x += per_cpu_ptr(zone->pageset, cpu)->vm_stat_diff[item]; | |
174 | ||
175 | if (x < 0) | |
176 | x = 0; | |
177 | #endif | |
178 | return x; | |
179 | } | |
180 | ||
599d0c95 MG |
181 | static inline unsigned long node_page_state_snapshot(pg_data_t *pgdat, |
182 | enum node_stat_item item) | |
183 | { | |
184 | long x = atomic_long_read(&pgdat->vm_stat[item]); | |
185 | ||
186 | #ifdef CONFIG_SMP | |
187 | int cpu; | |
188 | for_each_online_cpu(cpu) | |
189 | x += per_cpu_ptr(pgdat->per_cpu_nodestats, cpu)->vm_node_stat_diff[item]; | |
190 | ||
191 | if (x < 0) | |
192 | x = 0; | |
193 | #endif | |
194 | return x; | |
195 | } | |
196 | ||
197 | ||
2244b95a | 198 | #ifdef CONFIG_NUMA |
75ef7184 MG |
199 | extern unsigned long sum_zone_node_page_state(int node, |
200 | enum zone_stat_item item); | |
201 | extern unsigned long node_page_state(struct pglist_data *pgdat, | |
202 | enum node_stat_item item); | |
2244b95a | 203 | #else |
75ef7184 MG |
204 | #define sum_zone_node_page_state(node, item) global_page_state(item) |
205 | #define node_page_state(node, item) global_node_page_state(item) | |
ca889e6c | 206 | #endif /* CONFIG_NUMA */ |
2244b95a | 207 | |
2244b95a CL |
208 | #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d) |
209 | #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d)) | |
75ef7184 MG |
210 | #define add_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, __d) |
211 | #define sub_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, -(__d)) | |
2244b95a | 212 | |
2244b95a | 213 | #ifdef CONFIG_SMP |
6cdb18ad | 214 | void __mod_zone_page_state(struct zone *, enum zone_stat_item item, long); |
2244b95a CL |
215 | void __inc_zone_page_state(struct page *, enum zone_stat_item); |
216 | void __dec_zone_page_state(struct page *, enum zone_stat_item); | |
f6ac2354 | 217 | |
75ef7184 MG |
218 | void __mod_node_page_state(struct pglist_data *, enum node_stat_item item, long); |
219 | void __inc_node_page_state(struct page *, enum node_stat_item); | |
220 | void __dec_node_page_state(struct page *, enum node_stat_item); | |
221 | ||
6cdb18ad | 222 | void mod_zone_page_state(struct zone *, enum zone_stat_item, long); |
2244b95a CL |
223 | void inc_zone_page_state(struct page *, enum zone_stat_item); |
224 | void dec_zone_page_state(struct page *, enum zone_stat_item); | |
225 | ||
75ef7184 MG |
226 | void mod_node_page_state(struct pglist_data *, enum node_stat_item, long); |
227 | void inc_node_page_state(struct page *, enum node_stat_item); | |
228 | void dec_node_page_state(struct page *, enum node_stat_item); | |
229 | ||
2244b95a | 230 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
75ef7184 | 231 | extern void inc_node_state(struct pglist_data *, enum node_stat_item); |
c8785385 | 232 | extern void __inc_zone_state(struct zone *, enum zone_stat_item); |
75ef7184 | 233 | extern void __inc_node_state(struct pglist_data *, enum node_stat_item); |
c8785385 CL |
234 | extern void dec_zone_state(struct zone *, enum zone_stat_item); |
235 | extern void __dec_zone_state(struct zone *, enum zone_stat_item); | |
75ef7184 | 236 | extern void __dec_node_state(struct pglist_data *, enum node_stat_item); |
2244b95a | 237 | |
0eb77e98 | 238 | void quiet_vmstat(void); |
2bb921e5 | 239 | void cpu_vm_stats_fold(int cpu); |
a6cccdc3 | 240 | void refresh_zone_stat_thresholds(void); |
b44129b3 | 241 | |
52b6f46b HD |
242 | struct ctl_table; |
243 | int vmstat_refresh(struct ctl_table *, int write, | |
244 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
245 | ||
5a883813 MK |
246 | void drain_zonestat(struct zone *zone, struct per_cpu_pageset *); |
247 | ||
b44129b3 MG |
248 | int calculate_pressure_threshold(struct zone *zone); |
249 | int calculate_normal_threshold(struct zone *zone); | |
250 | void set_pgdat_percpu_threshold(pg_data_t *pgdat, | |
251 | int (*calculate_pressure)(struct zone *)); | |
2244b95a CL |
252 | #else /* CONFIG_SMP */ |
253 | ||
254 | /* | |
255 | * We do not maintain differentials in a single processor configuration. | |
256 | * The functions directly modify the zone and global counters. | |
257 | */ | |
258 | static inline void __mod_zone_page_state(struct zone *zone, | |
6cdb18ad | 259 | enum zone_stat_item item, long delta) |
2244b95a CL |
260 | { |
261 | zone_page_state_add(delta, zone, item); | |
262 | } | |
263 | ||
75ef7184 MG |
264 | static inline void __mod_node_page_state(struct pglist_data *pgdat, |
265 | enum node_stat_item item, int delta) | |
266 | { | |
267 | node_page_state_add(delta, pgdat, item); | |
268 | } | |
269 | ||
7f4599e9 CL |
270 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
271 | { | |
272 | atomic_long_inc(&zone->vm_stat[item]); | |
75ef7184 MG |
273 | atomic_long_inc(&vm_zone_stat[item]); |
274 | } | |
275 | ||
276 | static inline void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item) | |
277 | { | |
278 | atomic_long_inc(&pgdat->vm_stat[item]); | |
279 | atomic_long_inc(&vm_node_stat[item]); | |
7f4599e9 CL |
280 | } |
281 | ||
c8785385 CL |
282 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
283 | { | |
284 | atomic_long_dec(&zone->vm_stat[item]); | |
75ef7184 MG |
285 | atomic_long_dec(&vm_zone_stat[item]); |
286 | } | |
287 | ||
288 | static inline void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item) | |
289 | { | |
290 | atomic_long_dec(&pgdat->vm_stat[item]); | |
291 | atomic_long_dec(&vm_node_stat[item]); | |
c8785385 CL |
292 | } |
293 | ||
6a3ed212 JW |
294 | static inline void __inc_zone_page_state(struct page *page, |
295 | enum zone_stat_item item) | |
296 | { | |
297 | __inc_zone_state(page_zone(page), item); | |
298 | } | |
299 | ||
75ef7184 MG |
300 | static inline void __inc_node_page_state(struct page *page, |
301 | enum node_stat_item item) | |
302 | { | |
303 | __inc_node_state(page_pgdat(page), item); | |
304 | } | |
305 | ||
306 | ||
2244b95a CL |
307 | static inline void __dec_zone_page_state(struct page *page, |
308 | enum zone_stat_item item) | |
309 | { | |
57ce36fe | 310 | __dec_zone_state(page_zone(page), item); |
2244b95a CL |
311 | } |
312 | ||
75ef7184 MG |
313 | static inline void __dec_node_page_state(struct page *page, |
314 | enum node_stat_item item) | |
315 | { | |
316 | __dec_node_state(page_pgdat(page), item); | |
317 | } | |
318 | ||
319 | ||
2244b95a CL |
320 | /* |
321 | * We only use atomic operations to update counters. So there is no need to | |
322 | * disable interrupts. | |
323 | */ | |
324 | #define inc_zone_page_state __inc_zone_page_state | |
325 | #define dec_zone_page_state __dec_zone_page_state | |
326 | #define mod_zone_page_state __mod_zone_page_state | |
327 | ||
75ef7184 MG |
328 | #define inc_node_page_state __inc_node_page_state |
329 | #define dec_node_page_state __dec_node_page_state | |
330 | #define mod_node_page_state __mod_node_page_state | |
331 | ||
6a3ed212 | 332 | #define inc_zone_state __inc_zone_state |
75ef7184 | 333 | #define inc_node_state __inc_node_state |
6a3ed212 JW |
334 | #define dec_zone_state __dec_zone_state |
335 | ||
b44129b3 | 336 | #define set_pgdat_percpu_threshold(pgdat, callback) { } |
88f5acf8 | 337 | |
a6cccdc3 | 338 | static inline void refresh_zone_stat_thresholds(void) { } |
2bb921e5 | 339 | static inline void cpu_vm_stats_fold(int cpu) { } |
0eb77e98 | 340 | static inline void quiet_vmstat(void) { } |
a6cccdc3 | 341 | |
5a883813 MK |
342 | static inline void drain_zonestat(struct zone *zone, |
343 | struct per_cpu_pageset *pset) { } | |
fa25c503 KM |
344 | #endif /* CONFIG_SMP */ |
345 | ||
d1ce749a BZ |
346 | static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages, |
347 | int migratetype) | |
348 | { | |
349 | __mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages); | |
350 | if (is_migrate_cma(migratetype)) | |
351 | __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages); | |
352 | } | |
353 | ||
fa25c503 | 354 | extern const char * const vmstat_text[]; |
2244b95a CL |
355 | |
356 | #endif /* _LINUX_VMSTAT_H */ |