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1 | #ifndef _LINUX_VMSTAT_H |
2 | #define _LINUX_VMSTAT_H |
3 | |
4 | #include <linux/types.h> |
5 | #include <linux/percpu.h> |
6 | #include <linux/mm.h> |
7 | #include <linux/mmzone.h> |
8 | #include <asm/atomic.h> |
9 | |
10 | #ifdef CONFIG_ZONE_DMA |
11 | #define DMA_ZONE(xx) xx##_DMA, |
12 | #else |
13 | #define DMA_ZONE(xx) |
14 | #endif |
15 | |
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 | |
28 | |
29 | #define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE |
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 | #ifdef CONFIG_NUMA |
40 | PGSCAN_ZONE_RECLAIM_FAILED, |
41 | #endif |
42 | PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL, |
43 | KSWAPD_LOW_WMARK_HIT_QUICKLY, KSWAPD_HIGH_WMARK_HIT_QUICKLY, |
44 | KSWAPD_SKIP_CONGESTION_WAIT, |
45 | PAGEOUTRUN, ALLOCSTALL, PGROTATED, |
46 | #ifdef CONFIG_HUGETLB_PAGE |
47 | HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, |
48 | #endif |
49 | UNEVICTABLE_PGCULLED, /* culled to noreclaim list */ |
50 | UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */ |
51 | UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */ |
52 | UNEVICTABLE_PGMLOCKED, |
53 | UNEVICTABLE_PGMUNLOCKED, |
54 | UNEVICTABLE_PGCLEARED, /* on COW, page truncate */ |
55 | UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */ |
56 | UNEVICTABLE_MLOCKFREED, |
57 | NR_VM_EVENT_ITEMS |
58 | }; |
59 | |
60 | extern int sysctl_stat_interval; |
61 | |
62 | #ifdef CONFIG_VM_EVENT_COUNTERS |
63 | /* |
64 | * Light weight per cpu counter implementation. |
65 | * |
66 | * Counters should only be incremented and no critical kernel component |
67 | * should rely on the counter values. |
68 | * |
69 | * Counters are handled completely inline. On many platforms the code |
70 | * generated will simply be the increment of a global address. |
71 | */ |
72 | |
73 | struct vm_event_state { |
74 | unsigned long event[NR_VM_EVENT_ITEMS]; |
75 | }; |
76 | |
77 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
78 | |
79 | static inline void __count_vm_event(enum vm_event_item item) |
80 | { |
81 | __this_cpu_inc(vm_event_states.event[item]); |
82 | } |
83 | |
84 | static inline void count_vm_event(enum vm_event_item item) |
85 | { |
86 | this_cpu_inc(vm_event_states.event[item]); |
87 | } |
88 | |
89 | static inline void __count_vm_events(enum vm_event_item item, long delta) |
90 | { |
91 | __this_cpu_add(vm_event_states.event[item], delta); |
92 | } |
93 | |
94 | static inline void count_vm_events(enum vm_event_item item, long delta) |
95 | { |
96 | this_cpu_add(vm_event_states.event[item], delta); |
97 | } |
98 | |
99 | extern void all_vm_events(unsigned long *); |
100 | #ifdef CONFIG_HOTPLUG |
101 | extern void vm_events_fold_cpu(int cpu); |
102 | #else |
103 | static inline void vm_events_fold_cpu(int cpu) |
104 | { |
105 | } |
106 | #endif |
107 | |
108 | #else |
109 | |
110 | /* Disable counters */ |
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 | } |
129 | |
130 | #endif /* CONFIG_VM_EVENT_COUNTERS */ |
131 | |
132 | #define __count_zone_vm_events(item, zone, delta) \ |
133 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ |
134 | zone_idx(zone), delta) |
135 | |
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 | |
169 | extern unsigned long global_reclaimable_pages(void); |
170 | extern unsigned long zone_reclaimable_pages(struct zone *zone); |
171 | |
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 |
184 | #ifdef CONFIG_ZONE_DMA |
185 | zone_page_state(&zones[ZONE_DMA], item) + |
186 | #endif |
187 | #ifdef CONFIG_ZONE_DMA32 |
188 | zone_page_state(&zones[ZONE_DMA32], item) + |
189 | #endif |
190 | #ifdef CONFIG_HIGHMEM |
191 | zone_page_state(&zones[ZONE_HIGHMEM], item) + |
192 | #endif |
193 | zone_page_state(&zones[ZONE_NORMAL], item) + |
194 | zone_page_state(&zones[ZONE_MOVABLE], item); |
195 | } |
196 | |
197 | extern void zone_statistics(struct zone *, struct zone *); |
198 | |
199 | #else |
200 | |
201 | #define node_page_state(node, item) global_page_state(item) |
202 | #define zone_statistics(_zl,_z) do { } while (0) |
203 | |
204 | #endif /* CONFIG_NUMA */ |
205 | |
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 | |
214 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
215 | |
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); |
220 | |
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); |
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); |
229 | |
230 | void refresh_cpu_vm_stats(int); |
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 | |
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 | |
249 | static inline void __inc_zone_page_state(struct page *page, |
250 | enum zone_stat_item item) |
251 | { |
252 | __inc_zone_state(page_zone(page), item); |
253 | } |
254 | |
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 | |
261 | static inline void __dec_zone_page_state(struct page *page, |
262 | enum zone_stat_item item) |
263 | { |
264 | __dec_zone_state(page_zone(page), item); |
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) { } |
276 | #endif |
277 | |
278 | #endif /* _LINUX_VMSTAT_H */ |
279 |
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