1 #ifndef _LINUX_VMSTAT_H
2 #define _LINUX_VMSTAT_H
4 #include <linux/types.h>
5 #include <linux/percpu.h>
7 #include <linux/mmzone.h>
8 #include <asm/atomic.h>
10 #ifdef CONFIG_ZONE_DMA
11 #define DMA_ZONE(xx) xx##_DMA,
16 #ifdef CONFIG_ZONE_DMA32
17 #define DMA32_ZONE(xx) xx##_DMA32,
19 #define DMA32_ZONE(xx)
23 #define HIGHMEM_ZONE(xx) , xx##_HIGH
25 #define HIGHMEM_ZONE(xx)
29 #define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE
31 enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
32 FOR_ALL_ZONES(PGALLOC),
33 PGFREE, PGACTIVATE, PGDEACTIVATE,
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,
41 #ifdef CONFIG_HUGETLB_PAGE
42 HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL,
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;
53 #ifdef CONFIG_VM_EVENT_COUNTERS
55 * Light weight per cpu counter implementation.
57 * Counters should only be incremented and no critical kernel component
58 * should rely on the counter values.
60 * Counters are handled completely inline. On many platforms the code
61 * generated will simply be the increment of a global address.
64 struct vm_event_state {
65 unsigned long event[NR_VM_EVENT_ITEMS];
68 DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
70 static inline void __count_vm_event(enum vm_event_item item)
72 __get_cpu_var(vm_event_states).event[item]++;
75 static inline void count_vm_event(enum vm_event_item item)
77 get_cpu_var(vm_event_states).event[item]++;
81 static inline void __count_vm_events(enum vm_event_item item, long delta)
83 __get_cpu_var(vm_event_states).event[item] += delta;
86 static inline void count_vm_events(enum vm_event_item item, long delta)
88 get_cpu_var(vm_event_states).event[item] += delta;
92 extern void all_vm_events(unsigned long *);
94 extern void vm_events_fold_cpu(int cpu);
96 static inline void vm_events_fold_cpu(int cpu)
103 /* Disable counters */
104 static inline void count_vm_event(enum vm_event_item item)
107 static inline void count_vm_events(enum vm_event_item item, long delta)
110 static inline void __count_vm_event(enum vm_event_item item)
113 static inline void __count_vm_events(enum vm_event_item item, long delta)
116 static inline void all_vm_events(unsigned long *ret)
119 static inline void vm_events_fold_cpu(int cpu)
123 #endif /* CONFIG_VM_EVENT_COUNTERS */
125 #define __count_zone_vm_events(item, zone, delta) \
126 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
127 zone_idx(zone), delta)
130 * Zone based page accounting with per cpu differentials.
132 extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
134 static inline void zone_page_state_add(long x, struct zone *zone,
135 enum zone_stat_item item)
137 atomic_long_add(x, &zone->vm_stat[item]);
138 atomic_long_add(x, &vm_stat[item]);
141 static inline unsigned long global_page_state(enum zone_stat_item item)
143 long x = atomic_long_read(&vm_stat[item]);
151 static inline unsigned long zone_page_state(struct zone *zone,
152 enum zone_stat_item item)
154 long x = atomic_long_read(&zone->vm_stat[item]);
162 extern unsigned long global_lru_pages(void);
164 static inline unsigned long zone_lru_pages(struct zone *zone)
166 return (zone_page_state(zone, NR_ACTIVE_ANON)
167 + zone_page_state(zone, NR_ACTIVE_FILE)
168 + zone_page_state(zone, NR_INACTIVE_ANON)
169 + zone_page_state(zone, NR_INACTIVE_FILE));
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.
178 static inline unsigned long node_page_state(int node,
179 enum zone_stat_item item)
181 struct zone *zones = NODE_DATA(node)->node_zones;
184 #ifdef CONFIG_ZONE_DMA
185 zone_page_state(&zones[ZONE_DMA], item) +
187 #ifdef CONFIG_ZONE_DMA32
188 zone_page_state(&zones[ZONE_DMA32], item) +
190 #ifdef CONFIG_HIGHMEM
191 zone_page_state(&zones[ZONE_HIGHMEM], item) +
193 zone_page_state(&zones[ZONE_NORMAL], item) +
194 zone_page_state(&zones[ZONE_MOVABLE], item);
197 extern void zone_statistics(struct zone *, struct zone *);
201 #define node_page_state(node, item) global_page_state(item)
202 #define zone_statistics(_zl,_z) do { } while (0)
204 #endif /* CONFIG_NUMA */
206 #define __add_zone_page_state(__z, __i, __d) \
207 __mod_zone_page_state(__z, __i, __d)
208 #define __sub_zone_page_state(__z, __i, __d) \
209 __mod_zone_page_state(__z, __i,-(__d))
211 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
212 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
214 static inline void zap_zone_vm_stats(struct zone *zone)
216 memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
219 extern void inc_zone_state(struct zone *, enum zone_stat_item);
222 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int);
223 void __inc_zone_page_state(struct page *, enum zone_stat_item);
224 void __dec_zone_page_state(struct page *, enum zone_stat_item);
226 void mod_zone_page_state(struct zone *, enum zone_stat_item, int);
227 void inc_zone_page_state(struct page *, enum zone_stat_item);
228 void dec_zone_page_state(struct page *, enum zone_stat_item);
230 extern void inc_zone_state(struct zone *, enum zone_stat_item);
231 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
232 extern void dec_zone_state(struct zone *, enum zone_stat_item);
233 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
235 void refresh_cpu_vm_stats(int);
236 #else /* CONFIG_SMP */
239 * We do not maintain differentials in a single processor configuration.
240 * The functions directly modify the zone and global counters.
242 static inline void __mod_zone_page_state(struct zone *zone,
243 enum zone_stat_item item, int delta)
245 zone_page_state_add(delta, zone, item);
248 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
250 atomic_long_inc(&zone->vm_stat[item]);
251 atomic_long_inc(&vm_stat[item]);
254 static inline void __inc_zone_page_state(struct page *page,
255 enum zone_stat_item item)
257 __inc_zone_state(page_zone(page), item);
260 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
262 atomic_long_dec(&zone->vm_stat[item]);
263 atomic_long_dec(&vm_stat[item]);
266 static inline void __dec_zone_page_state(struct page *page,
267 enum zone_stat_item item)
269 __dec_zone_state(page_zone(page), item);
273 * We only use atomic operations to update counters. So there is no need to
274 * disable interrupts.
276 #define inc_zone_page_state __inc_zone_page_state
277 #define dec_zone_page_state __dec_zone_page_state
278 #define mod_zone_page_state __mod_zone_page_state
280 static inline void refresh_cpu_vm_stats(int cpu) { }
283 #endif /* _LINUX_VMSTAT_H */