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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 | |
f8891e5e | 10 | #ifdef CONFIG_VM_EVENT_COUNTERS |
f6ac2354 | 11 | /* |
f8891e5e | 12 | * Light weight per cpu counter implementation. |
f6ac2354 | 13 | * |
2aea4fb6 PJ |
14 | * Counters should only be incremented. You need to set EMBEDDED |
15 | * to disable VM_EVENT_COUNTERS. Things like procps (vmstat, | |
16 | * top, etc) use /proc/vmstat and depend on these counters. | |
f8891e5e CL |
17 | * |
18 | * Counters are handled completely inline. On many platforms the code | |
19 | * generated will simply be the increment of a global address. | |
f6ac2354 | 20 | */ |
f8891e5e | 21 | |
27bf71c2 CL |
22 | #ifdef CONFIG_ZONE_DMA32 |
23 | #define DMA32_ZONE(xx) xx##_DMA32, | |
24 | #else | |
25 | #define DMA32_ZONE(xx) | |
26 | #endif | |
27 | ||
28 | #ifdef CONFIG_HIGHMEM | |
29 | #define HIGHMEM_ZONE(xx) , xx##_HIGH | |
30 | #else | |
31 | #define HIGHMEM_ZONE(xx) | |
32 | #endif | |
33 | ||
34 | #define FOR_ALL_ZONES(xx) xx##_DMA, DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) | |
f8891e5e CL |
35 | |
36 | enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, | |
37 | FOR_ALL_ZONES(PGALLOC), | |
38 | PGFREE, PGACTIVATE, PGDEACTIVATE, | |
39 | PGFAULT, PGMAJFAULT, | |
40 | FOR_ALL_ZONES(PGREFILL), | |
41 | FOR_ALL_ZONES(PGSTEAL), | |
42 | FOR_ALL_ZONES(PGSCAN_KSWAPD), | |
43 | FOR_ALL_ZONES(PGSCAN_DIRECT), | |
44 | PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL, | |
45 | PAGEOUTRUN, ALLOCSTALL, PGROTATED, | |
46 | NR_VM_EVENT_ITEMS | |
47 | }; | |
48 | ||
49 | struct vm_event_state { | |
50 | unsigned long event[NR_VM_EVENT_ITEMS]; | |
f6ac2354 CL |
51 | }; |
52 | ||
f8891e5e CL |
53 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
54 | ||
55 | static inline void __count_vm_event(enum vm_event_item item) | |
56 | { | |
38cbcdc0 | 57 | __get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
58 | } |
59 | ||
60 | static inline void count_vm_event(enum vm_event_item item) | |
61 | { | |
38cbcdc0 | 62 | get_cpu_var(vm_event_states).event[item]++; |
f8891e5e CL |
63 | put_cpu(); |
64 | } | |
65 | ||
66 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
67 | { | |
38cbcdc0 | 68 | __get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
69 | } |
70 | ||
71 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
72 | { | |
38cbcdc0 | 73 | get_cpu_var(vm_event_states).event[item] += delta; |
f8891e5e CL |
74 | put_cpu(); |
75 | } | |
76 | ||
77 | extern void all_vm_events(unsigned long *); | |
e903387f | 78 | #ifdef CONFIG_HOTPLUG |
f8891e5e | 79 | extern void vm_events_fold_cpu(int cpu); |
e903387f MD |
80 | #else |
81 | static inline void vm_events_fold_cpu(int cpu) | |
82 | { | |
83 | } | |
84 | #endif | |
f8891e5e CL |
85 | |
86 | #else | |
87 | ||
88 | /* Disable counters */ | |
89 | #define get_cpu_vm_events(e) 0L | |
90 | #define count_vm_event(e) do { } while (0) | |
91 | #define count_vm_events(e,d) do { } while (0) | |
92 | #define __count_vm_event(e) do { } while (0) | |
93 | #define __count_vm_events(e,d) do { } while (0) | |
94 | #define vm_events_fold_cpu(x) do { } while (0) | |
95 | ||
96 | #endif /* CONFIG_VM_EVENT_COUNTERS */ | |
97 | ||
98 | #define __count_zone_vm_events(item, zone, delta) \ | |
99 | __count_vm_events(item##_DMA + zone_idx(zone), delta) | |
f6ac2354 | 100 | |
2244b95a CL |
101 | /* |
102 | * Zone based page accounting with per cpu differentials. | |
103 | */ | |
104 | extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; | |
105 | ||
106 | static inline void zone_page_state_add(long x, struct zone *zone, | |
107 | enum zone_stat_item item) | |
108 | { | |
109 | atomic_long_add(x, &zone->vm_stat[item]); | |
110 | atomic_long_add(x, &vm_stat[item]); | |
111 | } | |
112 | ||
113 | static inline unsigned long global_page_state(enum zone_stat_item item) | |
114 | { | |
115 | long x = atomic_long_read(&vm_stat[item]); | |
116 | #ifdef CONFIG_SMP | |
117 | if (x < 0) | |
118 | x = 0; | |
119 | #endif | |
120 | return x; | |
121 | } | |
122 | ||
123 | static inline unsigned long zone_page_state(struct zone *zone, | |
124 | enum zone_stat_item item) | |
125 | { | |
126 | long x = atomic_long_read(&zone->vm_stat[item]); | |
127 | #ifdef CONFIG_SMP | |
128 | if (x < 0) | |
129 | x = 0; | |
130 | #endif | |
131 | return x; | |
132 | } | |
133 | ||
134 | #ifdef CONFIG_NUMA | |
135 | /* | |
136 | * Determine the per node value of a stat item. This function | |
137 | * is called frequently in a NUMA machine, so try to be as | |
138 | * frugal as possible. | |
139 | */ | |
140 | static inline unsigned long node_page_state(int node, | |
141 | enum zone_stat_item item) | |
142 | { | |
143 | struct zone *zones = NODE_DATA(node)->node_zones; | |
144 | ||
145 | return | |
fb0e7942 | 146 | #ifdef CONFIG_ZONE_DMA32 |
2244b95a CL |
147 | zone_page_state(&zones[ZONE_DMA32], item) + |
148 | #endif | |
149 | zone_page_state(&zones[ZONE_NORMAL], item) + | |
2244b95a CL |
150 | #ifdef CONFIG_HIGHMEM |
151 | zone_page_state(&zones[ZONE_HIGHMEM], item) + | |
152 | #endif | |
153 | zone_page_state(&zones[ZONE_DMA], item); | |
154 | } | |
ca889e6c CL |
155 | |
156 | extern void zone_statistics(struct zonelist *, struct zone *); | |
157 | ||
2244b95a | 158 | #else |
ca889e6c | 159 | |
2244b95a | 160 | #define node_page_state(node, item) global_page_state(item) |
ca889e6c CL |
161 | #define zone_statistics(_zl,_z) do { } while (0) |
162 | ||
163 | #endif /* CONFIG_NUMA */ | |
2244b95a CL |
164 | |
165 | #define __add_zone_page_state(__z, __i, __d) \ | |
166 | __mod_zone_page_state(__z, __i, __d) | |
167 | #define __sub_zone_page_state(__z, __i, __d) \ | |
168 | __mod_zone_page_state(__z, __i,-(__d)) | |
169 | ||
170 | #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d) | |
171 | #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d)) | |
172 | ||
173 | static inline void zap_zone_vm_stats(struct zone *zone) | |
174 | { | |
175 | memset(zone->vm_stat, 0, sizeof(zone->vm_stat)); | |
176 | } | |
177 | ||
ca889e6c CL |
178 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
179 | ||
2244b95a CL |
180 | #ifdef CONFIG_SMP |
181 | void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int); | |
182 | void __inc_zone_page_state(struct page *, enum zone_stat_item); | |
183 | void __dec_zone_page_state(struct page *, enum zone_stat_item); | |
f6ac2354 | 184 | |
2244b95a CL |
185 | void mod_zone_page_state(struct zone *, enum zone_stat_item, int); |
186 | void inc_zone_page_state(struct page *, enum zone_stat_item); | |
187 | void dec_zone_page_state(struct page *, enum zone_stat_item); | |
188 | ||
189 | extern void inc_zone_state(struct zone *, enum zone_stat_item); | |
c8785385 CL |
190 | extern void __inc_zone_state(struct zone *, enum zone_stat_item); |
191 | extern void dec_zone_state(struct zone *, enum zone_stat_item); | |
192 | extern void __dec_zone_state(struct zone *, enum zone_stat_item); | |
2244b95a CL |
193 | |
194 | void refresh_cpu_vm_stats(int); | |
195 | void refresh_vm_stats(void); | |
196 | ||
197 | #else /* CONFIG_SMP */ | |
198 | ||
199 | /* | |
200 | * We do not maintain differentials in a single processor configuration. | |
201 | * The functions directly modify the zone and global counters. | |
202 | */ | |
203 | static inline void __mod_zone_page_state(struct zone *zone, | |
204 | enum zone_stat_item item, int delta) | |
205 | { | |
206 | zone_page_state_add(delta, zone, item); | |
207 | } | |
208 | ||
7f4599e9 CL |
209 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
210 | { | |
211 | atomic_long_inc(&zone->vm_stat[item]); | |
212 | atomic_long_inc(&vm_stat[item]); | |
213 | } | |
214 | ||
2244b95a CL |
215 | static inline void __inc_zone_page_state(struct page *page, |
216 | enum zone_stat_item item) | |
217 | { | |
7f4599e9 | 218 | __inc_zone_state(page_zone(page), item); |
2244b95a CL |
219 | } |
220 | ||
c8785385 CL |
221 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
222 | { | |
223 | atomic_long_dec(&zone->vm_stat[item]); | |
224 | atomic_long_dec(&vm_stat[item]); | |
225 | } | |
226 | ||
2244b95a CL |
227 | static inline void __dec_zone_page_state(struct page *page, |
228 | enum zone_stat_item item) | |
229 | { | |
230 | atomic_long_dec(&page_zone(page)->vm_stat[item]); | |
231 | atomic_long_dec(&vm_stat[item]); | |
232 | } | |
233 | ||
234 | /* | |
235 | * We only use atomic operations to update counters. So there is no need to | |
236 | * disable interrupts. | |
237 | */ | |
238 | #define inc_zone_page_state __inc_zone_page_state | |
239 | #define dec_zone_page_state __dec_zone_page_state | |
240 | #define mod_zone_page_state __mod_zone_page_state | |
241 | ||
242 | static inline void refresh_cpu_vm_stats(int cpu) { } | |
243 | static inline void refresh_vm_stats(void) { } | |
244 | #endif | |
245 | ||
246 | #endif /* _LINUX_VMSTAT_H */ |