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 #define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE
29
30 enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
31 FOR_ALL_ZONES(PGALLOC),
32 PGFREE, PGACTIVATE, PGDEACTIVATE,
33 PGFAULT, PGMAJFAULT,
34 FOR_ALL_ZONES(PGREFILL),
35 FOR_ALL_ZONES(PGSTEAL),
36 FOR_ALL_ZONES(PGSCAN_KSWAPD),
37 FOR_ALL_ZONES(PGSCAN_DIRECT),
38 PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL,
39 PAGEOUTRUN, ALLOCSTALL, PGROTATED,
40 NR_VM_EVENT_ITEMS
41 };
42
43 #ifdef CONFIG_VM_EVENT_COUNTERS
44 /*
45 * Light weight per cpu counter implementation.
46 *
47 * Counters should only be incremented and no critical kernel component
48 * should rely on the counter values.
49 *
50 * Counters are handled completely inline. On many platforms the code
51 * generated will simply be the increment of a global address.
52 */
53
54 struct vm_event_state {
55 unsigned long event[NR_VM_EVENT_ITEMS];
56 };
57
58 DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
59
60 static inline void __count_vm_event(enum vm_event_item item)
61 {
62 __get_cpu_var(vm_event_states).event[item]++;
63 }
64
65 static inline void count_vm_event(enum vm_event_item item)
66 {
67 get_cpu_var(vm_event_states).event[item]++;
68 put_cpu();
69 }
70
71 static inline void __count_vm_events(enum vm_event_item item, long delta)
72 {
73 __get_cpu_var(vm_event_states).event[item] += delta;
74 }
75
76 static inline void count_vm_events(enum vm_event_item item, long delta)
77 {
78 get_cpu_var(vm_event_states).event[item] += delta;
79 put_cpu();
80 }
81
82 extern void all_vm_events(unsigned long *);
83 #ifdef CONFIG_HOTPLUG
84 extern void vm_events_fold_cpu(int cpu);
85 #else
86 static inline void vm_events_fold_cpu(int cpu)
87 {
88 }
89 #endif
90
91 #else
92
93 /* Disable counters */
94 static inline void count_vm_event(enum vm_event_item item)
95 {
96 }
97 static inline void count_vm_events(enum vm_event_item item, long delta)
98 {
99 }
100 static inline void __count_vm_event(enum vm_event_item item)
101 {
102 }
103 static inline void __count_vm_events(enum vm_event_item item, long delta)
104 {
105 }
106 static inline void all_vm_events(unsigned long *ret)
107 {
108 }
109 static inline void vm_events_fold_cpu(int cpu)
110 {
111 }
112
113 #endif /* CONFIG_VM_EVENT_COUNTERS */
114
115 #define __count_zone_vm_events(item, zone, delta) \
116 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
117 zone_idx(zone), delta)
118
119 /*
120 * Zone based page accounting with per cpu differentials.
121 */
122 extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
123
124 static inline void zone_page_state_add(long x, struct zone *zone,
125 enum zone_stat_item item)
126 {
127 atomic_long_add(x, &zone->vm_stat[item]);
128 atomic_long_add(x, &vm_stat[item]);
129 }
130
131 static inline unsigned long global_page_state(enum zone_stat_item item)
132 {
133 long x = atomic_long_read(&vm_stat[item]);
134 #ifdef CONFIG_SMP
135 if (x < 0)
136 x = 0;
137 #endif
138 return x;
139 }
140
141 static inline unsigned long zone_page_state(struct zone *zone,
142 enum zone_stat_item item)
143 {
144 long x = atomic_long_read(&zone->vm_stat[item]);
145 #ifdef CONFIG_SMP
146 if (x < 0)
147 x = 0;
148 #endif
149 return x;
150 }
151
152 #ifdef CONFIG_NUMA
153 /*
154 * Determine the per node value of a stat item. This function
155 * is called frequently in a NUMA machine, so try to be as
156 * frugal as possible.
157 */
158 static inline unsigned long node_page_state(int node,
159 enum zone_stat_item item)
160 {
161 struct zone *zones = NODE_DATA(node)->node_zones;
162
163 return
164 #ifdef CONFIG_ZONE_DMA
165 zone_page_state(&zones[ZONE_DMA], item) +
166 #endif
167 #ifdef CONFIG_ZONE_DMA32
168 zone_page_state(&zones[ZONE_DMA32], item) +
169 #endif
170 #ifdef CONFIG_HIGHMEM
171 zone_page_state(&zones[ZONE_HIGHMEM], item) +
172 #endif
173 zone_page_state(&zones[ZONE_NORMAL], item) +
174 zone_page_state(&zones[ZONE_MOVABLE], item);
175 }
176
177 extern void zone_statistics(struct zonelist *, struct zone *);
178
179 #else
180
181 #define node_page_state(node, item) global_page_state(item)
182 #define zone_statistics(_zl,_z) do { } while (0)
183
184 #endif /* CONFIG_NUMA */
185
186 #define __add_zone_page_state(__z, __i, __d) \
187 __mod_zone_page_state(__z, __i, __d)
188 #define __sub_zone_page_state(__z, __i, __d) \
189 __mod_zone_page_state(__z, __i,-(__d))
190
191 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
192 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
193
194 static inline void zap_zone_vm_stats(struct zone *zone)
195 {
196 memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
197 }
198
199 extern void inc_zone_state(struct zone *, enum zone_stat_item);
200
201 #ifdef CONFIG_SMP
202 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int);
203 void __inc_zone_page_state(struct page *, enum zone_stat_item);
204 void __dec_zone_page_state(struct page *, enum zone_stat_item);
205
206 void mod_zone_page_state(struct zone *, enum zone_stat_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);
209
210 extern void inc_zone_state(struct zone *, enum zone_stat_item);
211 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
212 extern void dec_zone_state(struct zone *, enum zone_stat_item);
213 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
214
215 void refresh_cpu_vm_stats(int);
216 #else /* CONFIG_SMP */
217
218 /*
219 * We do not maintain differentials in a single processor configuration.
220 * The functions directly modify the zone and global counters.
221 */
222 static inline void __mod_zone_page_state(struct zone *zone,
223 enum zone_stat_item item, int delta)
224 {
225 zone_page_state_add(delta, zone, item);
226 }
227
228 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
229 {
230 atomic_long_inc(&zone->vm_stat[item]);
231 atomic_long_inc(&vm_stat[item]);
232 }
233
234 static inline void __inc_zone_page_state(struct page *page,
235 enum zone_stat_item item)
236 {
237 __inc_zone_state(page_zone(page), item);
238 }
239
240 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
241 {
242 atomic_long_dec(&zone->vm_stat[item]);
243 atomic_long_dec(&vm_stat[item]);
244 }
245
246 static inline void __dec_zone_page_state(struct page *page,
247 enum zone_stat_item item)
248 {
249 __dec_zone_state(page_zone(page), item);
250 }
251
252 /*
253 * We only use atomic operations to update counters. So there is no need to
254 * disable interrupts.
255 */
256 #define inc_zone_page_state __inc_zone_page_state
257 #define dec_zone_page_state __dec_zone_page_state
258 #define mod_zone_page_state __mod_zone_page_state
259
260 static inline void refresh_cpu_vm_stats(int cpu) { }
261 #endif
262
263 #endif /* _LINUX_VMSTAT_H */
264
|
This page was automatically generated by the
LXR engine.
|