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