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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 | ||
c748e134 AB |
47 | extern const struct seq_operations fragmentation_op; |
48 | extern const struct seq_operations pagetypeinfo_op; | |
49 | extern const struct seq_operations zoneinfo_op; | |
50 | extern const struct seq_operations vmstat_op; | |
51 | extern int sysctl_stat_interval; | |
52 | ||
780a0656 AM |
53 | #ifdef CONFIG_VM_EVENT_COUNTERS |
54 | /* | |
55 | * Light weight per cpu counter implementation. | |
56 | * | |
57 | * Counters should only be incremented and no critical kernel component | |
58 | * should rely on the counter values. | |
59 | * | |
60 | * Counters are handled completely inline. On many platforms the code | |
61 | * generated will simply be the increment of a global address. | |
62 | */ | |
63 | ||
f8891e5e CL |
64 | struct vm_event_state { |
65 | unsigned long event[NR_VM_EVENT_ITEMS]; | |
f6ac2354 CL |
66 | }; |
67 | ||
f8891e5e CL |
68 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
69 | ||
70 | static inline void __count_vm_event(enum vm_event_item item) | |
71 | { | |
38cbcdc0 | 72 | __get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
73 | } |
74 | ||
75 | static inline void count_vm_event(enum vm_event_item item) | |
76 | { | |
38cbcdc0 | 77 | get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
78 | put_cpu(); |
79 | } | |
80 | ||
81 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
82 | { | |
38cbcdc0 | 83 | __get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
84 | } |
85 | ||
86 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
87 | { | |
38cbcdc0 | 88 | get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
89 | put_cpu(); |
90 | } | |
91 | ||
92 | extern void all_vm_events(unsigned long *); | |
e903387f | 93 | #ifdef CONFIG_HOTPLUG |
f8891e5e | 94 | extern void vm_events_fold_cpu(int cpu); |
e903387f MD |
95 | #else |
96 | static inline void vm_events_fold_cpu(int cpu) | |
97 | { | |
98 | } | |
99 | #endif | |
f8891e5e CL |
100 | |
101 | #else | |
102 | ||
103 | /* Disable counters */ | |
780a0656 AM |
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 __count_vm_event(enum vm_event_item item) | |
111 | { | |
112 | } | |
113 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
114 | { | |
115 | } | |
116 | static inline void all_vm_events(unsigned long *ret) | |
117 | { | |
118 | } | |
119 | static inline void vm_events_fold_cpu(int cpu) | |
120 | { | |
121 | } | |
f8891e5e CL |
122 | |
123 | #endif /* CONFIG_VM_EVENT_COUNTERS */ | |
124 | ||
125 | #define __count_zone_vm_events(item, zone, delta) \ | |
4b51d669 CL |
126 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ |
127 | zone_idx(zone), delta) | |
f6ac2354 | 128 | |
2244b95a CL |
129 | /* |
130 | * Zone based page accounting with per cpu differentials. | |
131 | */ | |
132 | extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; | |
133 | ||
134 | static inline void zone_page_state_add(long x, struct zone *zone, | |
135 | enum zone_stat_item item) | |
136 | { | |
137 | atomic_long_add(x, &zone->vm_stat[item]); | |
138 | atomic_long_add(x, &vm_stat[item]); | |
139 | } | |
140 | ||
141 | static inline unsigned long global_page_state(enum zone_stat_item item) | |
142 | { | |
143 | long x = atomic_long_read(&vm_stat[item]); | |
144 | #ifdef CONFIG_SMP | |
145 | if (x < 0) | |
146 | x = 0; | |
147 | #endif | |
148 | return x; | |
149 | } | |
150 | ||
151 | static inline unsigned long zone_page_state(struct zone *zone, | |
152 | enum zone_stat_item item) | |
153 | { | |
154 | long x = atomic_long_read(&zone->vm_stat[item]); | |
155 | #ifdef CONFIG_SMP | |
156 | if (x < 0) | |
157 | x = 0; | |
158 | #endif | |
159 | return x; | |
160 | } | |
161 | ||
162 | #ifdef CONFIG_NUMA | |
163 | /* | |
164 | * Determine the per node value of a stat item. This function | |
165 | * is called frequently in a NUMA machine, so try to be as | |
166 | * frugal as possible. | |
167 | */ | |
168 | static inline unsigned long node_page_state(int node, | |
169 | enum zone_stat_item item) | |
170 | { | |
171 | struct zone *zones = NODE_DATA(node)->node_zones; | |
172 | ||
173 | return | |
4b51d669 CL |
174 | #ifdef CONFIG_ZONE_DMA |
175 | zone_page_state(&zones[ZONE_DMA], item) + | |
176 | #endif | |
fb0e7942 | 177 | #ifdef CONFIG_ZONE_DMA32 |
2244b95a CL |
178 | zone_page_state(&zones[ZONE_DMA32], item) + |
179 | #endif | |
2244b95a CL |
180 | #ifdef CONFIG_HIGHMEM |
181 | zone_page_state(&zones[ZONE_HIGHMEM], item) + | |
182 | #endif | |
2a1e274a MG |
183 | zone_page_state(&zones[ZONE_NORMAL], item) + |
184 | zone_page_state(&zones[ZONE_MOVABLE], item); | |
2244b95a | 185 | } |
ca889e6c | 186 | |
18ea7e71 | 187 | extern void zone_statistics(struct zone *, struct zone *); |
ca889e6c | 188 | |
2244b95a | 189 | #else |
ca889e6c | 190 | |
2244b95a | 191 | #define node_page_state(node, item) global_page_state(item) |
ca889e6c CL |
192 | #define zone_statistics(_zl,_z) do { } while (0) |
193 | ||
194 | #endif /* CONFIG_NUMA */ | |
2244b95a CL |
195 | |
196 | #define __add_zone_page_state(__z, __i, __d) \ | |
197 | __mod_zone_page_state(__z, __i, __d) | |
198 | #define __sub_zone_page_state(__z, __i, __d) \ | |
199 | __mod_zone_page_state(__z, __i,-(__d)) | |
200 | ||
201 | #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d) | |
202 | #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d)) | |
203 | ||
204 | static inline void zap_zone_vm_stats(struct zone *zone) | |
205 | { | |
206 | memset(zone->vm_stat, 0, sizeof(zone->vm_stat)); | |
207 | } | |
208 | ||
ca889e6c CL |
209 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
210 | ||
2244b95a CL |
211 | #ifdef CONFIG_SMP |
212 | void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int); | |
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 | |
2244b95a CL |
216 | void mod_zone_page_state(struct zone *, enum zone_stat_item, int); |
217 | void inc_zone_page_state(struct page *, enum zone_stat_item); | |
218 | void dec_zone_page_state(struct page *, enum zone_stat_item); | |
219 | ||
220 | extern void inc_zone_state(struct zone *, enum zone_stat_item); | |
c8785385 CL |
221 | extern void __inc_zone_state(struct zone *, enum zone_stat_item); |
222 | extern void dec_zone_state(struct zone *, enum zone_stat_item); | |
223 | extern void __dec_zone_state(struct zone *, enum zone_stat_item); | |
2244b95a CL |
224 | |
225 | void refresh_cpu_vm_stats(int); | |
2244b95a CL |
226 | #else /* CONFIG_SMP */ |
227 | ||
228 | /* | |
229 | * We do not maintain differentials in a single processor configuration. | |
230 | * The functions directly modify the zone and global counters. | |
231 | */ | |
232 | static inline void __mod_zone_page_state(struct zone *zone, | |
233 | enum zone_stat_item item, int delta) | |
234 | { | |
235 | zone_page_state_add(delta, zone, item); | |
236 | } | |
237 | ||
7f4599e9 CL |
238 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
239 | { | |
240 | atomic_long_inc(&zone->vm_stat[item]); | |
241 | atomic_long_inc(&vm_stat[item]); | |
242 | } | |
243 | ||
2244b95a CL |
244 | static inline void __inc_zone_page_state(struct page *page, |
245 | enum zone_stat_item item) | |
246 | { | |
7f4599e9 | 247 | __inc_zone_state(page_zone(page), item); |
2244b95a CL |
248 | } |
249 | ||
c8785385 CL |
250 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
251 | { | |
252 | atomic_long_dec(&zone->vm_stat[item]); | |
253 | atomic_long_dec(&vm_stat[item]); | |
254 | } | |
255 | ||
2244b95a CL |
256 | static inline void __dec_zone_page_state(struct page *page, |
257 | enum zone_stat_item item) | |
258 | { | |
57ce36fe | 259 | __dec_zone_state(page_zone(page), item); |
2244b95a CL |
260 | } |
261 | ||
262 | /* | |
263 | * We only use atomic operations to update counters. So there is no need to | |
264 | * disable interrupts. | |
265 | */ | |
266 | #define inc_zone_page_state __inc_zone_page_state | |
267 | #define dec_zone_page_state __dec_zone_page_state | |
268 | #define mod_zone_page_state __mod_zone_page_state | |
269 | ||
270 | static inline void refresh_cpu_vm_stats(int cpu) { } | |
2244b95a CL |
271 | #endif |
272 | ||
273 | #endif /* _LINUX_VMSTAT_H */ |