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),
40 PGSCAN_ZONE_RECLAIM_FAILED,
42 PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL,
43 KSWAPD_LOW_WMARK_HIT_QUICKLY, KSWAPD_HIGH_WMARK_HIT_QUICKLY,
44 KSWAPD_SKIP_CONGESTION_WAIT,
45 PAGEOUTRUN, ALLOCSTALL, PGROTATED,
46 #ifdef CONFIG_COMPACTION
47 COMPACTBLOCKS, COMPACTPAGES, COMPACTPAGEFAILED,
49 #ifdef CONFIG_HUGETLB_PAGE
50 HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL,
52 UNEVICTABLE_PGCULLED, /* culled to noreclaim list */
53 UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */
54 UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */
55 UNEVICTABLE_PGMLOCKED,
56 UNEVICTABLE_PGMUNLOCKED,
57 UNEVICTABLE_PGCLEARED, /* on COW, page truncate */
58 UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */
59 UNEVICTABLE_MLOCKFREED,
63 extern int sysctl_stat_interval;
65 #ifdef CONFIG_VM_EVENT_COUNTERS
67 * Light weight per cpu counter implementation.
69 * Counters should only be incremented and no critical kernel component
70 * should rely on the counter values.
72 * Counters are handled completely inline. On many platforms the code
73 * generated will simply be the increment of a global address.
76 struct vm_event_state {
77 unsigned long event[NR_VM_EVENT_ITEMS];
80 DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
82 static inline void __count_vm_event(enum vm_event_item item)
84 __this_cpu_inc(vm_event_states.event[item]);
87 static inline void count_vm_event(enum vm_event_item item)
89 this_cpu_inc(vm_event_states.event[item]);
92 static inline void __count_vm_events(enum vm_event_item item, long delta)
94 __this_cpu_add(vm_event_states.event[item], delta);
97 static inline void count_vm_events(enum vm_event_item item, long delta)
99 this_cpu_add(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_reclaimable_pages(void);
173 extern unsigned long zone_reclaimable_pages(struct zone *zone);
177 * Determine the per node value of a stat item. This function
178 * is called frequently in a NUMA machine, so try to be as
179 * frugal as possible.
181 static inline unsigned long node_page_state(int node,
182 enum zone_stat_item item)
184 struct zone *zones = NODE_DATA(node)->node_zones;
187 #ifdef CONFIG_ZONE_DMA
188 zone_page_state(&zones[ZONE_DMA], item) +
190 #ifdef CONFIG_ZONE_DMA32
191 zone_page_state(&zones[ZONE_DMA32], item) +
193 #ifdef CONFIG_HIGHMEM
194 zone_page_state(&zones[ZONE_HIGHMEM], item) +
196 zone_page_state(&zones[ZONE_NORMAL], item) +
197 zone_page_state(&zones[ZONE_MOVABLE], item);
200 extern void zone_statistics(struct zone *, struct zone *);
204 #define node_page_state(node, item) global_page_state(item)
205 #define zone_statistics(_zl,_z) do { } while (0)
207 #endif /* CONFIG_NUMA */
209 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
210 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
212 static inline void zap_zone_vm_stats(struct zone *zone)
214 memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
217 extern void inc_zone_state(struct zone *, enum zone_stat_item);
220 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int);
221 void __inc_zone_page_state(struct page *, enum zone_stat_item);
222 void __dec_zone_page_state(struct page *, enum zone_stat_item);
224 void mod_zone_page_state(struct zone *, enum zone_stat_item, int);
225 void inc_zone_page_state(struct page *, enum zone_stat_item);
226 void dec_zone_page_state(struct page *, enum zone_stat_item);
228 extern void inc_zone_state(struct zone *, enum zone_stat_item);
229 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
230 extern void dec_zone_state(struct zone *, enum zone_stat_item);
231 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
233 void refresh_cpu_vm_stats(int);
234 #else /* CONFIG_SMP */
237 * We do not maintain differentials in a single processor configuration.
238 * The functions directly modify the zone and global counters.
240 static inline void __mod_zone_page_state(struct zone *zone,
241 enum zone_stat_item item, int delta)
243 zone_page_state_add(delta, zone, item);
246 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
248 atomic_long_inc(&zone->vm_stat[item]);
249 atomic_long_inc(&vm_stat[item]);
252 static inline void __inc_zone_page_state(struct page *page,
253 enum zone_stat_item item)
255 __inc_zone_state(page_zone(page), item);
258 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
260 atomic_long_dec(&zone->vm_stat[item]);
261 atomic_long_dec(&vm_stat[item]);
264 static inline void __dec_zone_page_state(struct page *page,
265 enum zone_stat_item item)
267 __dec_zone_state(page_zone(page), item);
271 * We only use atomic operations to update counters. So there is no need to
272 * disable interrupts.
274 #define inc_zone_page_state __inc_zone_page_state
275 #define dec_zone_page_state __dec_zone_page_state
276 #define mod_zone_page_state __mod_zone_page_state
278 static inline void refresh_cpu_vm_stats(int cpu) { }
281 #endif /* _LINUX_VMSTAT_H */