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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 CL |
7 | #include <linux/mmzone.h> |
8 | #include <asm/atomic.h> | |
f6ac2354 | 9 | |
4b51d669 CL |
10 | #ifdef CONFIG_ZONE_DMA |
11 | #define DMA_ZONE(xx) xx##_DMA, | |
12 | #else | |
13 | #define DMA_ZONE(xx) | |
14 | #endif | |
15 | ||
27bf71c2 CL |
16 | #ifdef CONFIG_ZONE_DMA32 |
17 | #define DMA32_ZONE(xx) xx##_DMA32, | |
18 | #else | |
19 | #define DMA32_ZONE(xx) | |
20 | #endif | |
21 | ||
22 | #ifdef CONFIG_HIGHMEM | |
23 | #define HIGHMEM_ZONE(xx) , xx##_HIGH | |
24 | #else | |
25 | #define HIGHMEM_ZONE(xx) | |
26 | #endif | |
27 | ||
3b116300 | 28 | |
2a1e274a | 29 | #define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE |
f8891e5e CL |
30 | |
31 | enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, | |
32 | FOR_ALL_ZONES(PGALLOC), | |
33 | PGFREE, PGACTIVATE, PGDEACTIVATE, | |
34 | PGFAULT, PGMAJFAULT, | |
35 | FOR_ALL_ZONES(PGREFILL), | |
36 | FOR_ALL_ZONES(PGSTEAL), | |
37 | FOR_ALL_ZONES(PGSCAN_KSWAPD), | |
38 | FOR_ALL_ZONES(PGSCAN_DIRECT), | |
39 | PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL, | |
40 | PAGEOUTRUN, ALLOCSTALL, PGROTATED, | |
3b116300 AL |
41 | #ifdef CONFIG_HUGETLB_PAGE |
42 | HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, | |
bbfd28ee LS |
43 | #endif |
44 | #ifdef CONFIG_UNEVICTABLE_LRU | |
45 | UNEVICTABLE_PGCULLED, /* culled to noreclaim list */ | |
46 | UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */ | |
47 | UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */ | |
5344b7e6 NP |
48 | UNEVICTABLE_PGMLOCKED, |
49 | UNEVICTABLE_PGMUNLOCKED, | |
50 | UNEVICTABLE_PGCLEARED, /* on COW, page truncate */ | |
51 | UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */ | |
985737cf | 52 | UNEVICTABLE_MLOCKFREED, |
3b116300 | 53 | #endif |
f8891e5e CL |
54 | NR_VM_EVENT_ITEMS |
55 | }; | |
56 | ||
c748e134 AB |
57 | extern const struct seq_operations pagetypeinfo_op; |
58 | extern const struct seq_operations zoneinfo_op; | |
59 | extern const struct seq_operations vmstat_op; | |
60 | extern int sysctl_stat_interval; | |
61 | ||
780a0656 AM |
62 | #ifdef CONFIG_VM_EVENT_COUNTERS |
63 | /* | |
64 | * Light weight per cpu counter implementation. | |
65 | * | |
66 | * Counters should only be incremented and no critical kernel component | |
67 | * should rely on the counter values. | |
68 | * | |
69 | * Counters are handled completely inline. On many platforms the code | |
70 | * generated will simply be the increment of a global address. | |
71 | */ | |
72 | ||
f8891e5e CL |
73 | struct vm_event_state { |
74 | unsigned long event[NR_VM_EVENT_ITEMS]; | |
f6ac2354 CL |
75 | }; |
76 | ||
f8891e5e CL |
77 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
78 | ||
79 | static inline void __count_vm_event(enum vm_event_item item) | |
80 | { | |
38cbcdc0 | 81 | __get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
82 | } |
83 | ||
84 | static inline void count_vm_event(enum vm_event_item item) | |
85 | { | |
38cbcdc0 | 86 | get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
87 | put_cpu(); |
88 | } | |
89 | ||
90 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
91 | { | |
38cbcdc0 | 92 | __get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
93 | } |
94 | ||
95 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
96 | { | |
38cbcdc0 | 97 | get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
98 | put_cpu(); |
99 | } | |
100 | ||
101 | extern void all_vm_events(unsigned long *); | |
e903387f | 102 | #ifdef CONFIG_HOTPLUG |
f8891e5e | 103 | extern void vm_events_fold_cpu(int cpu); |
e903387f MD |
104 | #else |
105 | static inline void vm_events_fold_cpu(int cpu) | |
106 | { | |
107 | } | |
108 | #endif | |
f8891e5e CL |
109 | |
110 | #else | |
111 | ||
112 | /* Disable counters */ | |
780a0656 AM |
113 | static inline void count_vm_event(enum vm_event_item item) |
114 | { | |
115 | } | |
116 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
117 | { | |
118 | } | |
119 | static inline void __count_vm_event(enum vm_event_item item) | |
120 | { | |
121 | } | |
122 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
123 | { | |
124 | } | |
125 | static inline void all_vm_events(unsigned long *ret) | |
126 | { | |
127 | } | |
128 | static inline void vm_events_fold_cpu(int cpu) | |
129 | { | |
130 | } | |
f8891e5e CL |
131 | |
132 | #endif /* CONFIG_VM_EVENT_COUNTERS */ | |
133 | ||
134 | #define __count_zone_vm_events(item, zone, delta) \ | |
4b51d669 CL |
135 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ |
136 | zone_idx(zone), delta) | |
f6ac2354 | 137 | |
2244b95a CL |
138 | /* |
139 | * Zone based page accounting with per cpu differentials. | |
140 | */ | |
141 | extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; | |
142 | ||
143 | static inline void zone_page_state_add(long x, struct zone *zone, | |
144 | enum zone_stat_item item) | |
145 | { | |
146 | atomic_long_add(x, &zone->vm_stat[item]); | |
147 | atomic_long_add(x, &vm_stat[item]); | |
148 | } | |
149 | ||
150 | static inline unsigned long global_page_state(enum zone_stat_item item) | |
151 | { | |
152 | long x = atomic_long_read(&vm_stat[item]); | |
153 | #ifdef CONFIG_SMP | |
154 | if (x < 0) | |
155 | x = 0; | |
156 | #endif | |
157 | return x; | |
158 | } | |
159 | ||
160 | static inline unsigned long zone_page_state(struct zone *zone, | |
161 | enum zone_stat_item item) | |
162 | { | |
163 | long x = atomic_long_read(&zone->vm_stat[item]); | |
164 | #ifdef CONFIG_SMP | |
165 | if (x < 0) | |
166 | x = 0; | |
167 | #endif | |
168 | return x; | |
169 | } | |
170 | ||
4f98a2fe RR |
171 | extern unsigned long global_lru_pages(void); |
172 | ||
173 | static inline unsigned long zone_lru_pages(struct zone *zone) | |
174 | { | |
175 | return (zone_page_state(zone, NR_ACTIVE_ANON) | |
176 | + zone_page_state(zone, NR_ACTIVE_FILE) | |
177 | + zone_page_state(zone, NR_INACTIVE_ANON) | |
178 | + zone_page_state(zone, NR_INACTIVE_FILE)); | |
179 | } | |
180 | ||
2244b95a CL |
181 | #ifdef CONFIG_NUMA |
182 | /* | |
183 | * Determine the per node value of a stat item. This function | |
184 | * is called frequently in a NUMA machine, so try to be as | |
185 | * frugal as possible. | |
186 | */ | |
187 | static inline unsigned long node_page_state(int node, | |
188 | enum zone_stat_item item) | |
189 | { | |
190 | struct zone *zones = NODE_DATA(node)->node_zones; | |
191 | ||
192 | return | |
4b51d669 CL |
193 | #ifdef CONFIG_ZONE_DMA |
194 | zone_page_state(&zones[ZONE_DMA], item) + | |
195 | #endif | |
fb0e7942 | 196 | #ifdef CONFIG_ZONE_DMA32 |
2244b95a CL |
197 | zone_page_state(&zones[ZONE_DMA32], item) + |
198 | #endif | |
2244b95a CL |
199 | #ifdef CONFIG_HIGHMEM |
200 | zone_page_state(&zones[ZONE_HIGHMEM], item) + | |
201 | #endif | |
2a1e274a MG |
202 | zone_page_state(&zones[ZONE_NORMAL], item) + |
203 | zone_page_state(&zones[ZONE_MOVABLE], item); | |
2244b95a | 204 | } |
ca889e6c | 205 | |
18ea7e71 | 206 | extern void zone_statistics(struct zone *, struct zone *); |
ca889e6c | 207 | |
2244b95a | 208 | #else |
ca889e6c | 209 | |
2244b95a | 210 | #define node_page_state(node, item) global_page_state(item) |
ca889e6c CL |
211 | #define zone_statistics(_zl,_z) do { } while (0) |
212 | ||
213 | #endif /* CONFIG_NUMA */ | |
2244b95a CL |
214 | |
215 | #define __add_zone_page_state(__z, __i, __d) \ | |
216 | __mod_zone_page_state(__z, __i, __d) | |
217 | #define __sub_zone_page_state(__z, __i, __d) \ | |
218 | __mod_zone_page_state(__z, __i,-(__d)) | |
219 | ||
220 | #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d) | |
221 | #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d)) | |
222 | ||
223 | static inline void zap_zone_vm_stats(struct zone *zone) | |
224 | { | |
225 | memset(zone->vm_stat, 0, sizeof(zone->vm_stat)); | |
226 | } | |
227 | ||
ca889e6c CL |
228 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
229 | ||
2244b95a CL |
230 | #ifdef CONFIG_SMP |
231 | void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int); | |
232 | void __inc_zone_page_state(struct page *, enum zone_stat_item); | |
233 | void __dec_zone_page_state(struct page *, enum zone_stat_item); | |
f6ac2354 | 234 | |
2244b95a CL |
235 | void mod_zone_page_state(struct zone *, enum zone_stat_item, int); |
236 | void inc_zone_page_state(struct page *, enum zone_stat_item); | |
237 | void dec_zone_page_state(struct page *, enum zone_stat_item); | |
238 | ||
239 | extern void inc_zone_state(struct zone *, enum zone_stat_item); | |
c8785385 CL |
240 | extern void __inc_zone_state(struct zone *, enum zone_stat_item); |
241 | extern void dec_zone_state(struct zone *, enum zone_stat_item); | |
242 | extern void __dec_zone_state(struct zone *, enum zone_stat_item); | |
2244b95a CL |
243 | |
244 | void refresh_cpu_vm_stats(int); | |
2244b95a CL |
245 | #else /* CONFIG_SMP */ |
246 | ||
247 | /* | |
248 | * We do not maintain differentials in a single processor configuration. | |
249 | * The functions directly modify the zone and global counters. | |
250 | */ | |
251 | static inline void __mod_zone_page_state(struct zone *zone, | |
252 | enum zone_stat_item item, int delta) | |
253 | { | |
254 | zone_page_state_add(delta, zone, item); | |
255 | } | |
256 | ||
7f4599e9 CL |
257 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
258 | { | |
259 | atomic_long_inc(&zone->vm_stat[item]); | |
260 | atomic_long_inc(&vm_stat[item]); | |
261 | } | |
262 | ||
2244b95a CL |
263 | static inline void __inc_zone_page_state(struct page *page, |
264 | enum zone_stat_item item) | |
265 | { | |
7f4599e9 | 266 | __inc_zone_state(page_zone(page), item); |
2244b95a CL |
267 | } |
268 | ||
c8785385 CL |
269 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
270 | { | |
271 | atomic_long_dec(&zone->vm_stat[item]); | |
272 | atomic_long_dec(&vm_stat[item]); | |
273 | } | |
274 | ||
2244b95a CL |
275 | static inline void __dec_zone_page_state(struct page *page, |
276 | enum zone_stat_item item) | |
277 | { | |
57ce36fe | 278 | __dec_zone_state(page_zone(page), item); |
2244b95a CL |
279 | } |
280 | ||
281 | /* | |
282 | * We only use atomic operations to update counters. So there is no need to | |
283 | * disable interrupts. | |
284 | */ | |
285 | #define inc_zone_page_state __inc_zone_page_state | |
286 | #define dec_zone_page_state __dec_zone_page_state | |
287 | #define mod_zone_page_state __mod_zone_page_state | |
288 | ||
289 | static inline void refresh_cpu_vm_stats(int cpu) { } | |
2244b95a CL |
290 | #endif |
291 | ||
292 | #endif /* _LINUX_VMSTAT_H */ |