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 #ifdef CONFIG_VM_EVENT_COUNTERS
49 * Light weight per cpu counter implementation.
51 * Counters should only be incremented and no critical kernel component
52 * should rely on the counter values.
54 * Counters are handled completely inline. On many platforms the code
55 * generated will simply be the increment of a global address.
58 struct vm_event_state {
59 unsigned long event[NR_VM_EVENT_ITEMS];
62 DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
64 static inline void __count_vm_event(enum vm_event_item item)
66 __get_cpu_var(vm_event_states).event[item]++;
69 static inline void count_vm_event(enum vm_event_item item)
71 get_cpu_var(vm_event_states).event[item]++;
75 static inline void __count_vm_events(enum vm_event_item item, long delta)
77 __get_cpu_var(vm_event_states).event[item] += delta;
80 static inline void count_vm_events(enum vm_event_item item, long delta)
82 get_cpu_var(vm_event_states).event[item] += delta;
86 extern void all_vm_events(unsigned long *);
88 extern void vm_events_fold_cpu(int cpu);
90 static inline void vm_events_fold_cpu(int cpu)
97 /* Disable counters */
98 static inline void count_vm_event(enum vm_event_item item)
101 static inline void count_vm_events(enum vm_event_item item, long delta)
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 all_vm_events(unsigned long *ret)
113 static inline void vm_events_fold_cpu(int cpu)
117 #endif /* CONFIG_VM_EVENT_COUNTERS */
119 #define __count_zone_vm_events(item, zone, delta) \
120 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
121 zone_idx(zone), delta)
124 * Zone based page accounting with per cpu differentials.
126 extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
128 static inline void zone_page_state_add(long x, struct zone *zone,
129 enum zone_stat_item item)
131 atomic_long_add(x, &zone->vm_stat[item]);
132 atomic_long_add(x, &vm_stat[item]);
135 static inline unsigned long global_page_state(enum zone_stat_item item)
137 long x = atomic_long_read(&vm_stat[item]);
145 static inline unsigned long zone_page_state(struct zone *zone,
146 enum zone_stat_item item)
148 long x = atomic_long_read(&zone->vm_stat[item]);
158 * Determine the per node value of a stat item. This function
159 * is called frequently in a NUMA machine, so try to be as
160 * frugal as possible.
162 static inline unsigned long node_page_state(int node,
163 enum zone_stat_item item)
165 struct zone *zones = NODE_DATA(node)->node_zones;
168 #ifdef CONFIG_ZONE_DMA
169 zone_page_state(&zones[ZONE_DMA], item) +
171 #ifdef CONFIG_ZONE_DMA32
172 zone_page_state(&zones[ZONE_DMA32], item) +
174 #ifdef CONFIG_HIGHMEM
175 zone_page_state(&zones[ZONE_HIGHMEM], item) +
177 zone_page_state(&zones[ZONE_NORMAL], item) +
178 zone_page_state(&zones[ZONE_MOVABLE], item);
181 extern void zone_statistics(struct zone *, struct zone *);
185 #define node_page_state(node, item) global_page_state(item)
186 #define zone_statistics(_zl,_z) do { } while (0)
188 #endif /* CONFIG_NUMA */
190 #define __add_zone_page_state(__z, __i, __d) \
191 __mod_zone_page_state(__z, __i, __d)
192 #define __sub_zone_page_state(__z, __i, __d) \
193 __mod_zone_page_state(__z, __i,-(__d))
195 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
196 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
198 static inline void zap_zone_vm_stats(struct zone *zone)
200 memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
203 extern void inc_zone_state(struct zone *, enum zone_stat_item);
206 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int);
207 void __inc_zone_page_state(struct page *, enum zone_stat_item);
208 void __dec_zone_page_state(struct page *, enum zone_stat_item);
210 void mod_zone_page_state(struct zone *, enum zone_stat_item, int);
211 void inc_zone_page_state(struct page *, enum zone_stat_item);
212 void dec_zone_page_state(struct page *, enum zone_stat_item);
214 extern void inc_zone_state(struct zone *, enum zone_stat_item);
215 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
216 extern void dec_zone_state(struct zone *, enum zone_stat_item);
217 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
219 void refresh_cpu_vm_stats(int);
220 #else /* CONFIG_SMP */
223 * We do not maintain differentials in a single processor configuration.
224 * The functions directly modify the zone and global counters.
226 static inline void __mod_zone_page_state(struct zone *zone,
227 enum zone_stat_item item, int delta)
229 zone_page_state_add(delta, zone, item);
232 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
234 atomic_long_inc(&zone->vm_stat[item]);
235 atomic_long_inc(&vm_stat[item]);
238 static inline void __inc_zone_page_state(struct page *page,
239 enum zone_stat_item item)
241 __inc_zone_state(page_zone(page), item);
244 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
246 atomic_long_dec(&zone->vm_stat[item]);
247 atomic_long_dec(&vm_stat[item]);
250 static inline void __dec_zone_page_state(struct page *page,
251 enum zone_stat_item item)
253 __dec_zone_state(page_zone(page), item);
257 * We only use atomic operations to update counters. So there is no need to
258 * disable interrupts.
260 #define inc_zone_page_state __inc_zone_page_state
261 #define dec_zone_page_state __dec_zone_page_state
262 #define mod_zone_page_state __mod_zone_page_state
264 static inline void refresh_cpu_vm_stats(int cpu) { }
267 #endif /* _LINUX_VMSTAT_H */