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,
44 #ifdef CONFIG_UNEVICTABLE_LRU
45 UNEVICTABLE_PGCULLED, /* culled to noreclaim list */
46 UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */
47 UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */
48 UNEVICTABLE_PGMLOCKED,
49 UNEVICTABLE_PGMUNLOCKED,
50 UNEVICTABLE_PGCLEARED, /* on COW, page truncate */
51 UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */
52 UNEVICTABLE_MLOCKFREED,
57 extern int sysctl_stat_interval;
59 #ifdef CONFIG_VM_EVENT_COUNTERS
61 * Light weight per cpu counter implementation.
63 * Counters should only be incremented and no critical kernel component
64 * should rely on the counter values.
66 * Counters are handled completely inline. On many platforms the code
67 * generated will simply be the increment of a global address.
70 struct vm_event_state {
71 unsigned long event[NR_VM_EVENT_ITEMS];
74 DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
76 static inline void __count_vm_event(enum vm_event_item item)
78 __get_cpu_var(vm_event_states).event[item]++;
81 static inline void count_vm_event(enum vm_event_item item)
83 get_cpu_var(vm_event_states).event[item]++;
87 static inline void __count_vm_events(enum vm_event_item item, long delta)
89 __get_cpu_var(vm_event_states).event[item] += delta;
92 static inline void count_vm_events(enum vm_event_item item, long delta)
94 get_cpu_var(vm_event_states).event[item] += delta;
98 extern void all_vm_events(unsigned long *);
100 extern void vm_events_fold_cpu(int cpu);
102 static inline void vm_events_fold_cpu(int cpu)
109 /* Disable counters */
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 __count_vm_event(enum vm_event_item item)
119 static inline void __count_vm_events(enum vm_event_item item, long delta)
122 static inline void all_vm_events(unsigned long *ret)
125 static inline void vm_events_fold_cpu(int cpu)
129 #endif /* CONFIG_VM_EVENT_COUNTERS */
131 #define __count_zone_vm_events(item, zone, delta) \
132 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
133 zone_idx(zone), delta)
136 * Zone based page accounting with per cpu differentials.
138 extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
140 static inline void zone_page_state_add(long x, struct zone *zone,
141 enum zone_stat_item item)
143 atomic_long_add(x, &zone->vm_stat[item]);
144 atomic_long_add(x, &vm_stat[item]);
147 static inline unsigned long global_page_state(enum zone_stat_item item)
149 long x = atomic_long_read(&vm_stat[item]);
157 static inline unsigned long zone_page_state(struct zone *zone,
158 enum zone_stat_item item)
160 long x = atomic_long_read(&zone->vm_stat[item]);
168 extern unsigned long global_lru_pages(void);
170 static inline unsigned long zone_lru_pages(struct zone *zone)
172 return (zone_page_state(zone, NR_ACTIVE_ANON)
173 + zone_page_state(zone, NR_ACTIVE_FILE)
174 + zone_page_state(zone, NR_INACTIVE_ANON)
175 + zone_page_state(zone, NR_INACTIVE_FILE));
180 * Determine the per node value of a stat item. This function
181 * is called frequently in a NUMA machine, so try to be as
182 * frugal as possible.
184 static inline unsigned long node_page_state(int node,
185 enum zone_stat_item item)
187 struct zone *zones = NODE_DATA(node)->node_zones;
190 #ifdef CONFIG_ZONE_DMA
191 zone_page_state(&zones[ZONE_DMA], item) +
193 #ifdef CONFIG_ZONE_DMA32
194 zone_page_state(&zones[ZONE_DMA32], item) +
196 #ifdef CONFIG_HIGHMEM
197 zone_page_state(&zones[ZONE_HIGHMEM], item) +
199 zone_page_state(&zones[ZONE_NORMAL], item) +
200 zone_page_state(&zones[ZONE_MOVABLE], item);
203 extern void zone_statistics(struct zone *, struct zone *);
207 #define node_page_state(node, item) global_page_state(item)
208 #define zone_statistics(_zl,_z) do { } while (0)
210 #endif /* CONFIG_NUMA */
212 #define __add_zone_page_state(__z, __i, __d) \
213 __mod_zone_page_state(__z, __i, __d)
214 #define __sub_zone_page_state(__z, __i, __d) \
215 __mod_zone_page_state(__z, __i,-(__d))
217 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
218 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
220 static inline void zap_zone_vm_stats(struct zone *zone)
222 memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
225 extern void inc_zone_state(struct zone *, enum zone_stat_item);
228 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int);
229 void __inc_zone_page_state(struct page *, enum zone_stat_item);
230 void __dec_zone_page_state(struct page *, enum zone_stat_item);
232 void mod_zone_page_state(struct zone *, enum zone_stat_item, int);
233 void inc_zone_page_state(struct page *, enum zone_stat_item);
234 void dec_zone_page_state(struct page *, enum zone_stat_item);
236 extern void inc_zone_state(struct zone *, enum zone_stat_item);
237 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
238 extern void dec_zone_state(struct zone *, enum zone_stat_item);
239 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
241 void refresh_cpu_vm_stats(int);
242 #else /* CONFIG_SMP */
245 * We do not maintain differentials in a single processor configuration.
246 * The functions directly modify the zone and global counters.
248 static inline void __mod_zone_page_state(struct zone *zone,
249 enum zone_stat_item item, int delta)
251 zone_page_state_add(delta, zone, item);
254 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
256 atomic_long_inc(&zone->vm_stat[item]);
257 atomic_long_inc(&vm_stat[item]);
260 static inline void __inc_zone_page_state(struct page *page,
261 enum zone_stat_item item)
263 __inc_zone_state(page_zone(page), item);
266 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
268 atomic_long_dec(&zone->vm_stat[item]);
269 atomic_long_dec(&vm_stat[item]);
272 static inline void __dec_zone_page_state(struct page *page,
273 enum zone_stat_item item)
275 __dec_zone_state(page_zone(page), item);
279 * We only use atomic operations to update counters. So there is no need to
280 * disable interrupts.
282 #define inc_zone_page_state __inc_zone_page_state
283 #define dec_zone_page_state __dec_zone_page_state
284 #define mod_zone_page_state __mod_zone_page_state
286 static inline void refresh_cpu_vm_stats(int cpu) { }
289 #endif /* _LINUX_VMSTAT_H */