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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), | |
24cf7251 MG |
39 | #ifdef CONFIG_NUMA |
40 | PGSCAN_ZONE_RECLAIM_FAILED, | |
41 | #endif | |
f8891e5e CL |
42 | PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL, |
43 | PAGEOUTRUN, ALLOCSTALL, PGROTATED, | |
3b116300 AL |
44 | #ifdef CONFIG_HUGETLB_PAGE |
45 | HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, | |
bbfd28ee | 46 | #endif |
bbfd28ee LS |
47 | UNEVICTABLE_PGCULLED, /* culled to noreclaim list */ |
48 | UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */ | |
49 | UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */ | |
5344b7e6 NP |
50 | UNEVICTABLE_PGMLOCKED, |
51 | UNEVICTABLE_PGMUNLOCKED, | |
52 | UNEVICTABLE_PGCLEARED, /* on COW, page truncate */ | |
53 | UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */ | |
985737cf | 54 | UNEVICTABLE_MLOCKFREED, |
f8891e5e CL |
55 | NR_VM_EVENT_ITEMS |
56 | }; | |
57 | ||
c748e134 AB |
58 | extern int sysctl_stat_interval; |
59 | ||
780a0656 AM |
60 | #ifdef CONFIG_VM_EVENT_COUNTERS |
61 | /* | |
62 | * Light weight per cpu counter implementation. | |
63 | * | |
64 | * Counters should only be incremented and no critical kernel component | |
65 | * should rely on the counter values. | |
66 | * | |
67 | * Counters are handled completely inline. On many platforms the code | |
68 | * generated will simply be the increment of a global address. | |
69 | */ | |
70 | ||
f8891e5e CL |
71 | struct vm_event_state { |
72 | unsigned long event[NR_VM_EVENT_ITEMS]; | |
f6ac2354 CL |
73 | }; |
74 | ||
f8891e5e CL |
75 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
76 | ||
77 | static inline void __count_vm_event(enum vm_event_item item) | |
78 | { | |
38cbcdc0 | 79 | __get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
80 | } |
81 | ||
82 | static inline void count_vm_event(enum vm_event_item item) | |
83 | { | |
38cbcdc0 | 84 | get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
85 | put_cpu(); |
86 | } | |
87 | ||
88 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
89 | { | |
38cbcdc0 | 90 | __get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
91 | } |
92 | ||
93 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
94 | { | |
38cbcdc0 | 95 | get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
96 | put_cpu(); |
97 | } | |
98 | ||
99 | extern void all_vm_events(unsigned long *); | |
e903387f | 100 | #ifdef CONFIG_HOTPLUG |
f8891e5e | 101 | extern void vm_events_fold_cpu(int cpu); |
e903387f MD |
102 | #else |
103 | static inline void vm_events_fold_cpu(int cpu) | |
104 | { | |
105 | } | |
106 | #endif | |
f8891e5e CL |
107 | |
108 | #else | |
109 | ||
110 | /* Disable counters */ | |
780a0656 AM |
111 | static inline void count_vm_event(enum vm_event_item item) |
112 | { | |
113 | } | |
114 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
115 | { | |
116 | } | |
117 | static inline void __count_vm_event(enum vm_event_item item) | |
118 | { | |
119 | } | |
120 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
121 | { | |
122 | } | |
123 | static inline void all_vm_events(unsigned long *ret) | |
124 | { | |
125 | } | |
126 | static inline void vm_events_fold_cpu(int cpu) | |
127 | { | |
128 | } | |
f8891e5e CL |
129 | |
130 | #endif /* CONFIG_VM_EVENT_COUNTERS */ | |
131 | ||
132 | #define __count_zone_vm_events(item, zone, delta) \ | |
4b51d669 CL |
133 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ |
134 | zone_idx(zone), delta) | |
f6ac2354 | 135 | |
2244b95a CL |
136 | /* |
137 | * Zone based page accounting with per cpu differentials. | |
138 | */ | |
139 | extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; | |
140 | ||
141 | static inline void zone_page_state_add(long x, struct zone *zone, | |
142 | enum zone_stat_item item) | |
143 | { | |
144 | atomic_long_add(x, &zone->vm_stat[item]); | |
145 | atomic_long_add(x, &vm_stat[item]); | |
146 | } | |
147 | ||
148 | static inline unsigned long global_page_state(enum zone_stat_item item) | |
149 | { | |
150 | long x = atomic_long_read(&vm_stat[item]); | |
151 | #ifdef CONFIG_SMP | |
152 | if (x < 0) | |
153 | x = 0; | |
154 | #endif | |
155 | return x; | |
156 | } | |
157 | ||
158 | static inline unsigned long zone_page_state(struct zone *zone, | |
159 | enum zone_stat_item item) | |
160 | { | |
161 | long x = atomic_long_read(&zone->vm_stat[item]); | |
162 | #ifdef CONFIG_SMP | |
163 | if (x < 0) | |
164 | x = 0; | |
165 | #endif | |
166 | return x; | |
167 | } | |
168 | ||
adea02a1 WF |
169 | extern unsigned long global_reclaimable_pages(void); |
170 | extern unsigned long zone_reclaimable_pages(struct zone *zone); | |
4f98a2fe | 171 | |
2244b95a CL |
172 | #ifdef CONFIG_NUMA |
173 | /* | |
174 | * Determine the per node value of a stat item. This function | |
175 | * is called frequently in a NUMA machine, so try to be as | |
176 | * frugal as possible. | |
177 | */ | |
178 | static inline unsigned long node_page_state(int node, | |
179 | enum zone_stat_item item) | |
180 | { | |
181 | struct zone *zones = NODE_DATA(node)->node_zones; | |
182 | ||
183 | return | |
4b51d669 CL |
184 | #ifdef CONFIG_ZONE_DMA |
185 | zone_page_state(&zones[ZONE_DMA], item) + | |
186 | #endif | |
fb0e7942 | 187 | #ifdef CONFIG_ZONE_DMA32 |
2244b95a CL |
188 | zone_page_state(&zones[ZONE_DMA32], item) + |
189 | #endif | |
2244b95a CL |
190 | #ifdef CONFIG_HIGHMEM |
191 | zone_page_state(&zones[ZONE_HIGHMEM], item) + | |
192 | #endif | |
2a1e274a MG |
193 | zone_page_state(&zones[ZONE_NORMAL], item) + |
194 | zone_page_state(&zones[ZONE_MOVABLE], item); | |
2244b95a | 195 | } |
ca889e6c | 196 | |
18ea7e71 | 197 | extern void zone_statistics(struct zone *, struct zone *); |
ca889e6c | 198 | |
2244b95a | 199 | #else |
ca889e6c | 200 | |
2244b95a | 201 | #define node_page_state(node, item) global_page_state(item) |
ca889e6c CL |
202 | #define zone_statistics(_zl,_z) do { } while (0) |
203 | ||
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)) | |
208 | ||
209 | static inline void zap_zone_vm_stats(struct zone *zone) | |
210 | { | |
211 | memset(zone->vm_stat, 0, sizeof(zone->vm_stat)); | |
212 | } | |
213 | ||
ca889e6c CL |
214 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
215 | ||
2244b95a CL |
216 | #ifdef CONFIG_SMP |
217 | void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int); | |
218 | void __inc_zone_page_state(struct page *, enum zone_stat_item); | |
219 | void __dec_zone_page_state(struct page *, enum zone_stat_item); | |
f6ac2354 | 220 | |
2244b95a CL |
221 | void mod_zone_page_state(struct zone *, enum zone_stat_item, int); |
222 | void inc_zone_page_state(struct page *, enum zone_stat_item); | |
223 | void dec_zone_page_state(struct page *, enum zone_stat_item); | |
224 | ||
225 | extern void inc_zone_state(struct zone *, enum zone_stat_item); | |
c8785385 CL |
226 | extern void __inc_zone_state(struct zone *, enum zone_stat_item); |
227 | extern void dec_zone_state(struct zone *, enum zone_stat_item); | |
228 | extern void __dec_zone_state(struct zone *, enum zone_stat_item); | |
2244b95a CL |
229 | |
230 | void refresh_cpu_vm_stats(int); | |
2244b95a CL |
231 | #else /* CONFIG_SMP */ |
232 | ||
233 | /* | |
234 | * We do not maintain differentials in a single processor configuration. | |
235 | * The functions directly modify the zone and global counters. | |
236 | */ | |
237 | static inline void __mod_zone_page_state(struct zone *zone, | |
238 | enum zone_stat_item item, int delta) | |
239 | { | |
240 | zone_page_state_add(delta, zone, item); | |
241 | } | |
242 | ||
7f4599e9 CL |
243 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
244 | { | |
245 | atomic_long_inc(&zone->vm_stat[item]); | |
246 | atomic_long_inc(&vm_stat[item]); | |
247 | } | |
248 | ||
2244b95a CL |
249 | static inline void __inc_zone_page_state(struct page *page, |
250 | enum zone_stat_item item) | |
251 | { | |
7f4599e9 | 252 | __inc_zone_state(page_zone(page), item); |
2244b95a CL |
253 | } |
254 | ||
c8785385 CL |
255 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
256 | { | |
257 | atomic_long_dec(&zone->vm_stat[item]); | |
258 | atomic_long_dec(&vm_stat[item]); | |
259 | } | |
260 | ||
2244b95a CL |
261 | static inline void __dec_zone_page_state(struct page *page, |
262 | enum zone_stat_item item) | |
263 | { | |
57ce36fe | 264 | __dec_zone_state(page_zone(page), item); |
2244b95a CL |
265 | } |
266 | ||
267 | /* | |
268 | * We only use atomic operations to update counters. So there is no need to | |
269 | * disable interrupts. | |
270 | */ | |
271 | #define inc_zone_page_state __inc_zone_page_state | |
272 | #define dec_zone_page_state __dec_zone_page_state | |
273 | #define mod_zone_page_state __mod_zone_page_state | |
274 | ||
275 | static inline void refresh_cpu_vm_stats(int cpu) { } | |
2244b95a CL |
276 | #endif |
277 | ||
278 | #endif /* _LINUX_VMSTAT_H */ |