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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, | |
43 | #endif | |
f8891e5e CL |
44 | NR_VM_EVENT_ITEMS |
45 | }; | |
46 | ||
780a0656 AM |
47 | #ifdef CONFIG_VM_EVENT_COUNTERS |
48 | /* | |
49 | * Light weight per cpu counter implementation. | |
50 | * | |
51 | * Counters should only be incremented and no critical kernel component | |
52 | * should rely on the counter values. | |
53 | * | |
54 | * Counters are handled completely inline. On many platforms the code | |
55 | * generated will simply be the increment of a global address. | |
56 | */ | |
57 | ||
f8891e5e CL |
58 | struct vm_event_state { |
59 | unsigned long event[NR_VM_EVENT_ITEMS]; | |
f6ac2354 CL |
60 | }; |
61 | ||
f8891e5e CL |
62 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
63 | ||
64 | static inline void __count_vm_event(enum vm_event_item item) | |
65 | { | |
38cbcdc0 | 66 | __get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
67 | } |
68 | ||
69 | static inline void count_vm_event(enum vm_event_item item) | |
70 | { | |
38cbcdc0 | 71 | get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
72 | put_cpu(); |
73 | } | |
74 | ||
75 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
76 | { | |
38cbcdc0 | 77 | __get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
78 | } |
79 | ||
80 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
81 | { | |
38cbcdc0 | 82 | get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
83 | put_cpu(); |
84 | } | |
85 | ||
86 | extern void all_vm_events(unsigned long *); | |
e903387f | 87 | #ifdef CONFIG_HOTPLUG |
f8891e5e | 88 | extern void vm_events_fold_cpu(int cpu); |
e903387f MD |
89 | #else |
90 | static inline void vm_events_fold_cpu(int cpu) | |
91 | { | |
92 | } | |
93 | #endif | |
f8891e5e CL |
94 | |
95 | #else | |
96 | ||
97 | /* Disable counters */ | |
780a0656 AM |
98 | static inline void count_vm_event(enum vm_event_item item) |
99 | { | |
100 | } | |
101 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
102 | { | |
103 | } | |
104 | static inline void __count_vm_event(enum vm_event_item item) | |
105 | { | |
106 | } | |
107 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
108 | { | |
109 | } | |
110 | static inline void all_vm_events(unsigned long *ret) | |
111 | { | |
112 | } | |
113 | static inline void vm_events_fold_cpu(int cpu) | |
114 | { | |
115 | } | |
f8891e5e CL |
116 | |
117 | #endif /* CONFIG_VM_EVENT_COUNTERS */ | |
118 | ||
119 | #define __count_zone_vm_events(item, zone, delta) \ | |
4b51d669 CL |
120 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ |
121 | zone_idx(zone), delta) | |
f6ac2354 | 122 | |
2244b95a CL |
123 | /* |
124 | * Zone based page accounting with per cpu differentials. | |
125 | */ | |
126 | extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; | |
127 | ||
128 | static inline void zone_page_state_add(long x, struct zone *zone, | |
129 | enum zone_stat_item item) | |
130 | { | |
131 | atomic_long_add(x, &zone->vm_stat[item]); | |
132 | atomic_long_add(x, &vm_stat[item]); | |
133 | } | |
134 | ||
135 | static inline unsigned long global_page_state(enum zone_stat_item item) | |
136 | { | |
137 | long x = atomic_long_read(&vm_stat[item]); | |
138 | #ifdef CONFIG_SMP | |
139 | if (x < 0) | |
140 | x = 0; | |
141 | #endif | |
142 | return x; | |
143 | } | |
144 | ||
145 | static inline unsigned long zone_page_state(struct zone *zone, | |
146 | enum zone_stat_item item) | |
147 | { | |
148 | long x = atomic_long_read(&zone->vm_stat[item]); | |
149 | #ifdef CONFIG_SMP | |
150 | if (x < 0) | |
151 | x = 0; | |
152 | #endif | |
153 | return x; | |
154 | } | |
155 | ||
156 | #ifdef CONFIG_NUMA | |
157 | /* | |
158 | * Determine the per node value of a stat item. This function | |
159 | * is called frequently in a NUMA machine, so try to be as | |
160 | * frugal as possible. | |
161 | */ | |
162 | static inline unsigned long node_page_state(int node, | |
163 | enum zone_stat_item item) | |
164 | { | |
165 | struct zone *zones = NODE_DATA(node)->node_zones; | |
166 | ||
167 | return | |
4b51d669 CL |
168 | #ifdef CONFIG_ZONE_DMA |
169 | zone_page_state(&zones[ZONE_DMA], item) + | |
170 | #endif | |
fb0e7942 | 171 | #ifdef CONFIG_ZONE_DMA32 |
2244b95a CL |
172 | zone_page_state(&zones[ZONE_DMA32], item) + |
173 | #endif | |
2244b95a CL |
174 | #ifdef CONFIG_HIGHMEM |
175 | zone_page_state(&zones[ZONE_HIGHMEM], item) + | |
176 | #endif | |
2a1e274a MG |
177 | zone_page_state(&zones[ZONE_NORMAL], item) + |
178 | zone_page_state(&zones[ZONE_MOVABLE], item); | |
2244b95a | 179 | } |
ca889e6c | 180 | |
18ea7e71 | 181 | extern void zone_statistics(struct zone *, struct zone *); |
ca889e6c | 182 | |
2244b95a | 183 | #else |
ca889e6c | 184 | |
2244b95a | 185 | #define node_page_state(node, item) global_page_state(item) |
ca889e6c CL |
186 | #define zone_statistics(_zl,_z) do { } while (0) |
187 | ||
188 | #endif /* CONFIG_NUMA */ | |
2244b95a CL |
189 | |
190 | #define __add_zone_page_state(__z, __i, __d) \ | |
191 | __mod_zone_page_state(__z, __i, __d) | |
192 | #define __sub_zone_page_state(__z, __i, __d) \ | |
193 | __mod_zone_page_state(__z, __i,-(__d)) | |
194 | ||
195 | #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d) | |
196 | #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d)) | |
197 | ||
198 | static inline void zap_zone_vm_stats(struct zone *zone) | |
199 | { | |
200 | memset(zone->vm_stat, 0, sizeof(zone->vm_stat)); | |
201 | } | |
202 | ||
ca889e6c CL |
203 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
204 | ||
2244b95a CL |
205 | #ifdef CONFIG_SMP |
206 | void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int); | |
207 | void __inc_zone_page_state(struct page *, enum zone_stat_item); | |
208 | void __dec_zone_page_state(struct page *, enum zone_stat_item); | |
f6ac2354 | 209 | |
2244b95a CL |
210 | void mod_zone_page_state(struct zone *, enum zone_stat_item, int); |
211 | void inc_zone_page_state(struct page *, enum zone_stat_item); | |
212 | void dec_zone_page_state(struct page *, enum zone_stat_item); | |
213 | ||
214 | extern void inc_zone_state(struct zone *, enum zone_stat_item); | |
c8785385 CL |
215 | extern void __inc_zone_state(struct zone *, enum zone_stat_item); |
216 | extern void dec_zone_state(struct zone *, enum zone_stat_item); | |
217 | extern void __dec_zone_state(struct zone *, enum zone_stat_item); | |
2244b95a CL |
218 | |
219 | void refresh_cpu_vm_stats(int); | |
2244b95a CL |
220 | #else /* CONFIG_SMP */ |
221 | ||
222 | /* | |
223 | * We do not maintain differentials in a single processor configuration. | |
224 | * The functions directly modify the zone and global counters. | |
225 | */ | |
226 | static inline void __mod_zone_page_state(struct zone *zone, | |
227 | enum zone_stat_item item, int delta) | |
228 | { | |
229 | zone_page_state_add(delta, zone, item); | |
230 | } | |
231 | ||
7f4599e9 CL |
232 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
233 | { | |
234 | atomic_long_inc(&zone->vm_stat[item]); | |
235 | atomic_long_inc(&vm_stat[item]); | |
236 | } | |
237 | ||
2244b95a CL |
238 | static inline void __inc_zone_page_state(struct page *page, |
239 | enum zone_stat_item item) | |
240 | { | |
7f4599e9 | 241 | __inc_zone_state(page_zone(page), item); |
2244b95a CL |
242 | } |
243 | ||
c8785385 CL |
244 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
245 | { | |
246 | atomic_long_dec(&zone->vm_stat[item]); | |
247 | atomic_long_dec(&vm_stat[item]); | |
248 | } | |
249 | ||
2244b95a CL |
250 | static inline void __dec_zone_page_state(struct page *page, |
251 | enum zone_stat_item item) | |
252 | { | |
57ce36fe | 253 | __dec_zone_state(page_zone(page), item); |
2244b95a CL |
254 | } |
255 | ||
256 | /* | |
257 | * We only use atomic operations to update counters. So there is no need to | |
258 | * disable interrupts. | |
259 | */ | |
260 | #define inc_zone_page_state __inc_zone_page_state | |
261 | #define dec_zone_page_state __dec_zone_page_state | |
262 | #define mod_zone_page_state __mod_zone_page_state | |
263 | ||
264 | static inline void refresh_cpu_vm_stats(int cpu) { } | |
2244b95a CL |
265 | #endif |
266 | ||
267 | #endif /* _LINUX_VMSTAT_H */ |