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 fragmentation_op;
58 extern const struct seq_operations pagetypeinfo_op;
59 extern const struct seq_operations zoneinfo_op;
60 extern const struct seq_operations vmstat_op;
61 extern int sysctl_stat_interval;
63 #ifdef CONFIG_VM_EVENT_COUNTERS
65 * Light weight per cpu counter implementation.
67 * Counters should only be incremented and no critical kernel component
68 * should rely on the counter values.
70 * Counters are handled completely inline. On many platforms the code
71 * generated will simply be the increment of a global address.
74 struct vm_event_state {
75 unsigned long event[NR_VM_EVENT_ITEMS];
78 DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
80 static inline void __count_vm_event(enum vm_event_item item)
82 __get_cpu_var(vm_event_states).event[item]++;
85 static inline void count_vm_event(enum vm_event_item item)
87 get_cpu_var(vm_event_states).event[item]++;
91 static inline void __count_vm_events(enum vm_event_item item, long delta)
93 __get_cpu_var(vm_event_states).event[item] += delta;
96 static inline void count_vm_events(enum vm_event_item item, long delta)
98 get_cpu_var(vm_event_states).event[item] += delta;
102 extern void all_vm_events(unsigned long *);
103 #ifdef CONFIG_HOTPLUG
104 extern void vm_events_fold_cpu(int cpu);
106 static inline void vm_events_fold_cpu(int cpu)
113 /* Disable counters */
114 static inline void count_vm_event(enum vm_event_item item)
117 static inline void count_vm_events(enum vm_event_item item, long delta)
120 static inline void __count_vm_event(enum vm_event_item item)
123 static inline void __count_vm_events(enum vm_event_item item, long delta)
126 static inline void all_vm_events(unsigned long *ret)
129 static inline void vm_events_fold_cpu(int cpu)
133 #endif /* CONFIG_VM_EVENT_COUNTERS */
135 #define __count_zone_vm_events(item, zone, delta) \
136 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
137 zone_idx(zone), delta)
140 * Zone based page accounting with per cpu differentials.
142 extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
144 static inline void zone_page_state_add(long x, struct zone *zone,
145 enum zone_stat_item item)
147 atomic_long_add(x, &zone->vm_stat[item]);
148 atomic_long_add(x, &vm_stat[item]);
151 static inline unsigned long global_page_state(enum zone_stat_item item)
153 long x = atomic_long_read(&vm_stat[item]);
161 static inline unsigned long zone_page_state(struct zone *zone,
162 enum zone_stat_item item)
164 long x = atomic_long_read(&zone->vm_stat[item]);
172 extern unsigned long global_lru_pages(void);
174 static inline unsigned long zone_lru_pages(struct zone *zone)
176 return (zone_page_state(zone, NR_ACTIVE_ANON)
177 + zone_page_state(zone, NR_ACTIVE_FILE)
178 + zone_page_state(zone, NR_INACTIVE_ANON)
179 + zone_page_state(zone, NR_INACTIVE_FILE));
184 * Determine the per node value of a stat item. This function
185 * is called frequently in a NUMA machine, so try to be as
186 * frugal as possible.
188 static inline unsigned long node_page_state(int node,
189 enum zone_stat_item item)
191 struct zone *zones = NODE_DATA(node)->node_zones;
194 #ifdef CONFIG_ZONE_DMA
195 zone_page_state(&zones[ZONE_DMA], item) +
197 #ifdef CONFIG_ZONE_DMA32
198 zone_page_state(&zones[ZONE_DMA32], item) +
200 #ifdef CONFIG_HIGHMEM
201 zone_page_state(&zones[ZONE_HIGHMEM], item) +
203 zone_page_state(&zones[ZONE_NORMAL], item) +
204 zone_page_state(&zones[ZONE_MOVABLE], item);
207 extern void zone_statistics(struct zone *, struct zone *);
211 #define node_page_state(node, item) global_page_state(item)
212 #define zone_statistics(_zl,_z) do { } while (0)
214 #endif /* CONFIG_NUMA */
216 #define __add_zone_page_state(__z, __i, __d) \
217 __mod_zone_page_state(__z, __i, __d)
218 #define __sub_zone_page_state(__z, __i, __d) \
219 __mod_zone_page_state(__z, __i,-(__d))
221 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
222 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
224 static inline void zap_zone_vm_stats(struct zone *zone)
226 memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
229 extern void inc_zone_state(struct zone *, enum zone_stat_item);
232 void __mod_zone_page_state(struct zone *, enum zone_stat_item 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 void mod_zone_page_state(struct zone *, enum zone_stat_item, int);
237 void inc_zone_page_state(struct page *, enum zone_stat_item);
238 void dec_zone_page_state(struct page *, enum zone_stat_item);
240 extern void inc_zone_state(struct zone *, enum zone_stat_item);
241 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
242 extern void dec_zone_state(struct zone *, enum zone_stat_item);
243 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
245 void refresh_cpu_vm_stats(int);
246 #else /* CONFIG_SMP */
249 * We do not maintain differentials in a single processor configuration.
250 * The functions directly modify the zone and global counters.
252 static inline void __mod_zone_page_state(struct zone *zone,
253 enum zone_stat_item item, int delta)
255 zone_page_state_add(delta, zone, item);
258 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
260 atomic_long_inc(&zone->vm_stat[item]);
261 atomic_long_inc(&vm_stat[item]);
264 static inline void __inc_zone_page_state(struct page *page,
265 enum zone_stat_item item)
267 __inc_zone_state(page_zone(page), item);
270 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
272 atomic_long_dec(&zone->vm_stat[item]);
273 atomic_long_dec(&vm_stat[item]);
276 static inline void __dec_zone_page_state(struct page *page,
277 enum zone_stat_item item)
279 __dec_zone_state(page_zone(page), item);
283 * We only use atomic operations to update counters. So there is no need to
284 * disable interrupts.
286 #define inc_zone_page_state __inc_zone_page_state
287 #define dec_zone_page_state __dec_zone_page_state
288 #define mod_zone_page_state __mod_zone_page_state
290 static inline void refresh_cpu_vm_stats(int cpu) { }
293 #endif /* _LINUX_VMSTAT_H */