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 const struct seq_operations zoneinfo_op;
58 extern const struct seq_operations vmstat_op;
59 extern int sysctl_stat_interval;
61 #ifdef CONFIG_VM_EVENT_COUNTERS
63 * Light weight per cpu counter implementation.
65 * Counters should only be incremented and no critical kernel component
66 * should rely on the counter values.
68 * Counters are handled completely inline. On many platforms the code
69 * generated will simply be the increment of a global address.
72 struct vm_event_state {
73 unsigned long event[NR_VM_EVENT_ITEMS];
76 DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
78 static inline void __count_vm_event(enum vm_event_item item)
80 __get_cpu_var(vm_event_states).event[item]++;
83 static inline void count_vm_event(enum vm_event_item item)
85 get_cpu_var(vm_event_states).event[item]++;
89 static inline void __count_vm_events(enum vm_event_item item, long delta)
91 __get_cpu_var(vm_event_states).event[item] += delta;
94 static inline void count_vm_events(enum vm_event_item item, long delta)
96 get_cpu_var(vm_event_states).event[item] += delta;
100 extern void all_vm_events(unsigned long *);
101 #ifdef CONFIG_HOTPLUG
102 extern void vm_events_fold_cpu(int cpu);
104 static inline void vm_events_fold_cpu(int cpu)
111 /* Disable counters */
112 static inline void count_vm_event(enum vm_event_item item)
115 static inline void count_vm_events(enum vm_event_item item, long delta)
118 static inline void __count_vm_event(enum vm_event_item item)
121 static inline void __count_vm_events(enum vm_event_item item, long delta)
124 static inline void all_vm_events(unsigned long *ret)
127 static inline void vm_events_fold_cpu(int cpu)
131 #endif /* CONFIG_VM_EVENT_COUNTERS */
133 #define __count_zone_vm_events(item, zone, delta) \
134 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
135 zone_idx(zone), delta)
138 * Zone based page accounting with per cpu differentials.
140 extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
142 static inline void zone_page_state_add(long x, struct zone *zone,
143 enum zone_stat_item item)
145 atomic_long_add(x, &zone->vm_stat[item]);
146 atomic_long_add(x, &vm_stat[item]);
149 static inline unsigned long global_page_state(enum zone_stat_item item)
151 long x = atomic_long_read(&vm_stat[item]);
159 static inline unsigned long zone_page_state(struct zone *zone,
160 enum zone_stat_item item)
162 long x = atomic_long_read(&zone->vm_stat[item]);
170 extern unsigned long global_lru_pages(void);
172 static inline unsigned long zone_lru_pages(struct zone *zone)
174 return (zone_page_state(zone, NR_ACTIVE_ANON)
175 + zone_page_state(zone, NR_ACTIVE_FILE)
176 + zone_page_state(zone, NR_INACTIVE_ANON)
177 + zone_page_state(zone, NR_INACTIVE_FILE));
182 * Determine the per node value of a stat item. This function
183 * is called frequently in a NUMA machine, so try to be as
184 * frugal as possible.
186 static inline unsigned long node_page_state(int node,
187 enum zone_stat_item item)
189 struct zone *zones = NODE_DATA(node)->node_zones;
192 #ifdef CONFIG_ZONE_DMA
193 zone_page_state(&zones[ZONE_DMA], item) +
195 #ifdef CONFIG_ZONE_DMA32
196 zone_page_state(&zones[ZONE_DMA32], item) +
198 #ifdef CONFIG_HIGHMEM
199 zone_page_state(&zones[ZONE_HIGHMEM], item) +
201 zone_page_state(&zones[ZONE_NORMAL], item) +
202 zone_page_state(&zones[ZONE_MOVABLE], item);
205 extern void zone_statistics(struct zone *, struct zone *);
209 #define node_page_state(node, item) global_page_state(item)
210 #define zone_statistics(_zl,_z) do { } while (0)
212 #endif /* CONFIG_NUMA */
214 #define __add_zone_page_state(__z, __i, __d) \
215 __mod_zone_page_state(__z, __i, __d)
216 #define __sub_zone_page_state(__z, __i, __d) \
217 __mod_zone_page_state(__z, __i,-(__d))
219 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
220 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
222 static inline void zap_zone_vm_stats(struct zone *zone)
224 memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
227 extern void inc_zone_state(struct zone *, enum zone_stat_item);
230 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int);
231 void __inc_zone_page_state(struct page *, enum zone_stat_item);
232 void __dec_zone_page_state(struct page *, enum zone_stat_item);
234 void mod_zone_page_state(struct zone *, enum zone_stat_item, int);
235 void inc_zone_page_state(struct page *, enum zone_stat_item);
236 void dec_zone_page_state(struct page *, enum zone_stat_item);
238 extern void inc_zone_state(struct zone *, enum zone_stat_item);
239 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
240 extern void dec_zone_state(struct zone *, enum zone_stat_item);
241 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
243 void refresh_cpu_vm_stats(int);
244 #else /* CONFIG_SMP */
247 * We do not maintain differentials in a single processor configuration.
248 * The functions directly modify the zone and global counters.
250 static inline void __mod_zone_page_state(struct zone *zone,
251 enum zone_stat_item item, int delta)
253 zone_page_state_add(delta, zone, item);
256 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
258 atomic_long_inc(&zone->vm_stat[item]);
259 atomic_long_inc(&vm_stat[item]);
262 static inline void __inc_zone_page_state(struct page *page,
263 enum zone_stat_item item)
265 __inc_zone_state(page_zone(page), item);
268 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
270 atomic_long_dec(&zone->vm_stat[item]);
271 atomic_long_dec(&vm_stat[item]);
274 static inline void __dec_zone_page_state(struct page *page,
275 enum zone_stat_item item)
277 __dec_zone_state(page_zone(page), item);
281 * We only use atomic operations to update counters. So there is no need to
282 * disable interrupts.
284 #define inc_zone_page_state __inc_zone_page_state
285 #define dec_zone_page_state __dec_zone_page_state
286 #define mod_zone_page_state __mod_zone_page_state
288 static inline void refresh_cpu_vm_stats(int cpu) { }
291 #endif /* _LINUX_VMSTAT_H */