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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 | 42 | PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL, |
bb3ab596 KM |
43 | KSWAPD_LOW_WMARK_HIT_QUICKLY, KSWAPD_HIGH_WMARK_HIT_QUICKLY, |
44 | KSWAPD_SKIP_CONGESTION_WAIT, | |
f8891e5e | 45 | PAGEOUTRUN, ALLOCSTALL, PGROTATED, |
748446bb MG |
46 | #ifdef CONFIG_COMPACTION |
47 | COMPACTBLOCKS, COMPACTPAGES, COMPACTPAGEFAILED, | |
56de7263 | 48 | COMPACTSTALL, COMPACTFAIL, COMPACTSUCCESS, |
748446bb | 49 | #endif |
3b116300 AL |
50 | #ifdef CONFIG_HUGETLB_PAGE |
51 | HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, | |
bbfd28ee | 52 | #endif |
bbfd28ee LS |
53 | UNEVICTABLE_PGCULLED, /* culled to noreclaim list */ |
54 | UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */ | |
55 | UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */ | |
5344b7e6 NP |
56 | UNEVICTABLE_PGMLOCKED, |
57 | UNEVICTABLE_PGMUNLOCKED, | |
58 | UNEVICTABLE_PGCLEARED, /* on COW, page truncate */ | |
59 | UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */ | |
985737cf | 60 | UNEVICTABLE_MLOCKFREED, |
f8891e5e CL |
61 | NR_VM_EVENT_ITEMS |
62 | }; | |
63 | ||
c748e134 AB |
64 | extern int sysctl_stat_interval; |
65 | ||
780a0656 AM |
66 | #ifdef CONFIG_VM_EVENT_COUNTERS |
67 | /* | |
68 | * Light weight per cpu counter implementation. | |
69 | * | |
70 | * Counters should only be incremented and no critical kernel component | |
71 | * should rely on the counter values. | |
72 | * | |
73 | * Counters are handled completely inline. On many platforms the code | |
74 | * generated will simply be the increment of a global address. | |
75 | */ | |
76 | ||
f8891e5e CL |
77 | struct vm_event_state { |
78 | unsigned long event[NR_VM_EVENT_ITEMS]; | |
f6ac2354 CL |
79 | }; |
80 | ||
f8891e5e CL |
81 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
82 | ||
83 | static inline void __count_vm_event(enum vm_event_item item) | |
84 | { | |
dd17c8f7 | 85 | __this_cpu_inc(vm_event_states.event[item]); |
f8891e5e CL |
86 | } |
87 | ||
88 | static inline void count_vm_event(enum vm_event_item item) | |
89 | { | |
dd17c8f7 | 90 | this_cpu_inc(vm_event_states.event[item]); |
f8891e5e CL |
91 | } |
92 | ||
93 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
94 | { | |
dd17c8f7 | 95 | __this_cpu_add(vm_event_states.event[item], delta); |
f8891e5e CL |
96 | } |
97 | ||
98 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
99 | { | |
dd17c8f7 | 100 | this_cpu_add(vm_event_states.event[item], delta); |
f8891e5e CL |
101 | } |
102 | ||
103 | extern void all_vm_events(unsigned long *); | |
e903387f | 104 | #ifdef CONFIG_HOTPLUG |
f8891e5e | 105 | extern void vm_events_fold_cpu(int cpu); |
e903387f MD |
106 | #else |
107 | static inline void vm_events_fold_cpu(int cpu) | |
108 | { | |
109 | } | |
110 | #endif | |
f8891e5e CL |
111 | |
112 | #else | |
113 | ||
114 | /* Disable counters */ | |
780a0656 AM |
115 | static inline void count_vm_event(enum vm_event_item item) |
116 | { | |
117 | } | |
118 | static inline void count_vm_events(enum vm_event_item item, long delta) | |
119 | { | |
120 | } | |
121 | static inline void __count_vm_event(enum vm_event_item item) | |
122 | { | |
123 | } | |
124 | static inline void __count_vm_events(enum vm_event_item item, long delta) | |
125 | { | |
126 | } | |
127 | static inline void all_vm_events(unsigned long *ret) | |
128 | { | |
129 | } | |
130 | static inline void vm_events_fold_cpu(int cpu) | |
131 | { | |
132 | } | |
f8891e5e CL |
133 | |
134 | #endif /* CONFIG_VM_EVENT_COUNTERS */ | |
135 | ||
136 | #define __count_zone_vm_events(item, zone, delta) \ | |
4b51d669 CL |
137 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ |
138 | zone_idx(zone), delta) | |
f6ac2354 | 139 | |
2244b95a CL |
140 | /* |
141 | * Zone based page accounting with per cpu differentials. | |
142 | */ | |
143 | extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; | |
144 | ||
145 | static inline void zone_page_state_add(long x, struct zone *zone, | |
146 | enum zone_stat_item item) | |
147 | { | |
148 | atomic_long_add(x, &zone->vm_stat[item]); | |
149 | atomic_long_add(x, &vm_stat[item]); | |
150 | } | |
151 | ||
152 | static inline unsigned long global_page_state(enum zone_stat_item item) | |
153 | { | |
154 | long x = atomic_long_read(&vm_stat[item]); | |
155 | #ifdef CONFIG_SMP | |
156 | if (x < 0) | |
157 | x = 0; | |
158 | #endif | |
159 | return x; | |
160 | } | |
161 | ||
162 | static inline unsigned long zone_page_state(struct zone *zone, | |
163 | enum zone_stat_item item) | |
164 | { | |
165 | long x = atomic_long_read(&zone->vm_stat[item]); | |
166 | #ifdef CONFIG_SMP | |
167 | if (x < 0) | |
168 | x = 0; | |
169 | #endif | |
170 | return x; | |
171 | } | |
172 | ||
aa454840 CL |
173 | /* |
174 | * More accurate version that also considers the currently pending | |
175 | * deltas. For that we need to loop over all cpus to find the current | |
176 | * deltas. There is no synchronization so the result cannot be | |
177 | * exactly accurate either. | |
178 | */ | |
179 | static inline unsigned long zone_page_state_snapshot(struct zone *zone, | |
180 | enum zone_stat_item item) | |
181 | { | |
182 | long x = atomic_long_read(&zone->vm_stat[item]); | |
183 | ||
184 | #ifdef CONFIG_SMP | |
185 | int cpu; | |
186 | for_each_online_cpu(cpu) | |
187 | x += per_cpu_ptr(zone->pageset, cpu)->vm_stat_diff[item]; | |
188 | ||
189 | if (x < 0) | |
190 | x = 0; | |
191 | #endif | |
192 | return x; | |
193 | } | |
194 | ||
adea02a1 WF |
195 | extern unsigned long global_reclaimable_pages(void); |
196 | extern unsigned long zone_reclaimable_pages(struct zone *zone); | |
4f98a2fe | 197 | |
2244b95a CL |
198 | #ifdef CONFIG_NUMA |
199 | /* | |
200 | * Determine the per node value of a stat item. This function | |
201 | * is called frequently in a NUMA machine, so try to be as | |
202 | * frugal as possible. | |
203 | */ | |
204 | static inline unsigned long node_page_state(int node, | |
205 | enum zone_stat_item item) | |
206 | { | |
207 | struct zone *zones = NODE_DATA(node)->node_zones; | |
208 | ||
209 | return | |
4b51d669 CL |
210 | #ifdef CONFIG_ZONE_DMA |
211 | zone_page_state(&zones[ZONE_DMA], item) + | |
212 | #endif | |
fb0e7942 | 213 | #ifdef CONFIG_ZONE_DMA32 |
2244b95a CL |
214 | zone_page_state(&zones[ZONE_DMA32], item) + |
215 | #endif | |
2244b95a CL |
216 | #ifdef CONFIG_HIGHMEM |
217 | zone_page_state(&zones[ZONE_HIGHMEM], item) + | |
218 | #endif | |
2a1e274a MG |
219 | zone_page_state(&zones[ZONE_NORMAL], item) + |
220 | zone_page_state(&zones[ZONE_MOVABLE], item); | |
2244b95a | 221 | } |
ca889e6c | 222 | |
18ea7e71 | 223 | extern void zone_statistics(struct zone *, struct zone *); |
ca889e6c | 224 | |
2244b95a | 225 | #else |
ca889e6c | 226 | |
2244b95a | 227 | #define node_page_state(node, item) global_page_state(item) |
ca889e6c CL |
228 | #define zone_statistics(_zl,_z) do { } while (0) |
229 | ||
230 | #endif /* CONFIG_NUMA */ | |
2244b95a | 231 | |
2244b95a CL |
232 | #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d) |
233 | #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d)) | |
234 | ||
235 | static inline void zap_zone_vm_stats(struct zone *zone) | |
236 | { | |
237 | memset(zone->vm_stat, 0, sizeof(zone->vm_stat)); | |
238 | } | |
239 | ||
ca889e6c CL |
240 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
241 | ||
2244b95a CL |
242 | #ifdef CONFIG_SMP |
243 | void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int); | |
244 | void __inc_zone_page_state(struct page *, enum zone_stat_item); | |
245 | void __dec_zone_page_state(struct page *, enum zone_stat_item); | |
f6ac2354 | 246 | |
2244b95a CL |
247 | void mod_zone_page_state(struct zone *, enum zone_stat_item, int); |
248 | void inc_zone_page_state(struct page *, enum zone_stat_item); | |
249 | void dec_zone_page_state(struct page *, enum zone_stat_item); | |
250 | ||
251 | extern void inc_zone_state(struct zone *, enum zone_stat_item); | |
c8785385 CL |
252 | extern void __inc_zone_state(struct zone *, enum zone_stat_item); |
253 | extern void dec_zone_state(struct zone *, enum zone_stat_item); | |
254 | extern void __dec_zone_state(struct zone *, enum zone_stat_item); | |
2244b95a CL |
255 | |
256 | void refresh_cpu_vm_stats(int); | |
2244b95a CL |
257 | #else /* CONFIG_SMP */ |
258 | ||
259 | /* | |
260 | * We do not maintain differentials in a single processor configuration. | |
261 | * The functions directly modify the zone and global counters. | |
262 | */ | |
263 | static inline void __mod_zone_page_state(struct zone *zone, | |
264 | enum zone_stat_item item, int delta) | |
265 | { | |
266 | zone_page_state_add(delta, zone, item); | |
267 | } | |
268 | ||
7f4599e9 CL |
269 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
270 | { | |
271 | atomic_long_inc(&zone->vm_stat[item]); | |
272 | atomic_long_inc(&vm_stat[item]); | |
273 | } | |
274 | ||
2244b95a CL |
275 | static inline void __inc_zone_page_state(struct page *page, |
276 | enum zone_stat_item item) | |
277 | { | |
7f4599e9 | 278 | __inc_zone_state(page_zone(page), item); |
2244b95a CL |
279 | } |
280 | ||
c8785385 CL |
281 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
282 | { | |
283 | atomic_long_dec(&zone->vm_stat[item]); | |
284 | atomic_long_dec(&vm_stat[item]); | |
285 | } | |
286 | ||
2244b95a CL |
287 | static inline void __dec_zone_page_state(struct page *page, |
288 | enum zone_stat_item item) | |
289 | { | |
57ce36fe | 290 | __dec_zone_state(page_zone(page), item); |
2244b95a CL |
291 | } |
292 | ||
293 | /* | |
294 | * We only use atomic operations to update counters. So there is no need to | |
295 | * disable interrupts. | |
296 | */ | |
297 | #define inc_zone_page_state __inc_zone_page_state | |
298 | #define dec_zone_page_state __dec_zone_page_state | |
299 | #define mod_zone_page_state __mod_zone_page_state | |
300 | ||
301 | static inline void refresh_cpu_vm_stats(int cpu) { } | |
2244b95a CL |
302 | #endif |
303 | ||
304 | #endif /* _LINUX_VMSTAT_H */ |