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 extern const struct seq_operations fragmentation_op
;
48 extern const struct seq_operations pagetypeinfo_op
;
49 extern const struct seq_operations zoneinfo_op
;
50 extern const struct seq_operations vmstat_op
;
51 extern int sysctl_stat_interval
;
53 #ifdef CONFIG_VM_EVENT_COUNTERS
55 * Light weight per cpu counter implementation.
57 * Counters should only be incremented and no critical kernel component
58 * should rely on the counter values.
60 * Counters are handled completely inline. On many platforms the code
61 * generated will simply be the increment of a global address.
64 struct vm_event_state
{
65 unsigned long event
[NR_VM_EVENT_ITEMS
];
68 DECLARE_PER_CPU(struct vm_event_state
, vm_event_states
);
70 static inline void __count_vm_event(enum vm_event_item item
)
72 __get_cpu_var(vm_event_states
).event
[item
]++;
75 static inline void count_vm_event(enum vm_event_item item
)
77 get_cpu_var(vm_event_states
).event
[item
]++;
81 static inline void __count_vm_events(enum vm_event_item item
, long delta
)
83 __get_cpu_var(vm_event_states
).event
[item
] += delta
;
86 static inline void count_vm_events(enum vm_event_item item
, long delta
)
88 get_cpu_var(vm_event_states
).event
[item
] += delta
;
92 extern void all_vm_events(unsigned long *);
94 extern void vm_events_fold_cpu(int cpu
);
96 static inline void vm_events_fold_cpu(int cpu
)
103 /* Disable counters */
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 __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 all_vm_events(unsigned long *ret
)
119 static inline void vm_events_fold_cpu(int cpu
)
123 #endif /* CONFIG_VM_EVENT_COUNTERS */
125 #define __count_zone_vm_events(item, zone, delta) \
126 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
127 zone_idx(zone), delta)
130 * Zone based page accounting with per cpu differentials.
132 extern atomic_long_t vm_stat
[NR_VM_ZONE_STAT_ITEMS
];
134 static inline void zone_page_state_add(long x
, struct zone
*zone
,
135 enum zone_stat_item item
)
137 atomic_long_add(x
, &zone
->vm_stat
[item
]);
138 atomic_long_add(x
, &vm_stat
[item
]);
141 static inline unsigned long global_page_state(enum zone_stat_item item
)
143 long x
= atomic_long_read(&vm_stat
[item
]);
151 static inline unsigned long zone_page_state(struct zone
*zone
,
152 enum zone_stat_item item
)
154 long x
= atomic_long_read(&zone
->vm_stat
[item
]);
162 extern unsigned long global_lru_pages(void);
164 static inline unsigned long zone_lru_pages(struct zone
*zone
)
166 return (zone_page_state(zone
, NR_ACTIVE_ANON
)
167 + zone_page_state(zone
, NR_ACTIVE_FILE
)
168 + zone_page_state(zone
, NR_INACTIVE_ANON
)
169 + zone_page_state(zone
, NR_INACTIVE_FILE
));
174 * Determine the per node value of a stat item. This function
175 * is called frequently in a NUMA machine, so try to be as
176 * frugal as possible.
178 static inline unsigned long node_page_state(int node
,
179 enum zone_stat_item item
)
181 struct zone
*zones
= NODE_DATA(node
)->node_zones
;
184 #ifdef CONFIG_ZONE_DMA
185 zone_page_state(&zones
[ZONE_DMA
], item
) +
187 #ifdef CONFIG_ZONE_DMA32
188 zone_page_state(&zones
[ZONE_DMA32
], item
) +
190 #ifdef CONFIG_HIGHMEM
191 zone_page_state(&zones
[ZONE_HIGHMEM
], item
) +
193 zone_page_state(&zones
[ZONE_NORMAL
], item
) +
194 zone_page_state(&zones
[ZONE_MOVABLE
], item
);
197 extern void zone_statistics(struct zone
*, struct zone
*);
201 #define node_page_state(node, item) global_page_state(item)
202 #define zone_statistics(_zl,_z) do { } while (0)
204 #endif /* CONFIG_NUMA */
206 #define __add_zone_page_state(__z, __i, __d) \
207 __mod_zone_page_state(__z, __i, __d)
208 #define __sub_zone_page_state(__z, __i, __d) \
209 __mod_zone_page_state(__z, __i,-(__d))
211 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
212 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
214 static inline void zap_zone_vm_stats(struct zone
*zone
)
216 memset(zone
->vm_stat
, 0, sizeof(zone
->vm_stat
));
219 extern void inc_zone_state(struct zone
*, enum zone_stat_item
);
222 void __mod_zone_page_state(struct zone
*, enum zone_stat_item item
, int);
223 void __inc_zone_page_state(struct page
*, enum zone_stat_item
);
224 void __dec_zone_page_state(struct page
*, enum zone_stat_item
);
226 void mod_zone_page_state(struct zone
*, enum zone_stat_item
, int);
227 void inc_zone_page_state(struct page
*, enum zone_stat_item
);
228 void dec_zone_page_state(struct page
*, enum zone_stat_item
);
230 extern void inc_zone_state(struct zone
*, enum zone_stat_item
);
231 extern void __inc_zone_state(struct zone
*, enum zone_stat_item
);
232 extern void dec_zone_state(struct zone
*, enum zone_stat_item
);
233 extern void __dec_zone_state(struct zone
*, enum zone_stat_item
);
235 void refresh_cpu_vm_stats(int);
236 #else /* CONFIG_SMP */
239 * We do not maintain differentials in a single processor configuration.
240 * The functions directly modify the zone and global counters.
242 static inline void __mod_zone_page_state(struct zone
*zone
,
243 enum zone_stat_item item
, int delta
)
245 zone_page_state_add(delta
, zone
, item
);
248 static inline void __inc_zone_state(struct zone
*zone
, enum zone_stat_item item
)
250 atomic_long_inc(&zone
->vm_stat
[item
]);
251 atomic_long_inc(&vm_stat
[item
]);
254 static inline void __inc_zone_page_state(struct page
*page
,
255 enum zone_stat_item item
)
257 __inc_zone_state(page_zone(page
), item
);
260 static inline void __dec_zone_state(struct zone
*zone
, enum zone_stat_item item
)
262 atomic_long_dec(&zone
->vm_stat
[item
]);
263 atomic_long_dec(&vm_stat
[item
]);
266 static inline void __dec_zone_page_state(struct page
*page
,
267 enum zone_stat_item item
)
269 __dec_zone_state(page_zone(page
), item
);
273 * We only use atomic operations to update counters. So there is no need to
274 * disable interrupts.
276 #define inc_zone_page_state __inc_zone_page_state
277 #define dec_zone_page_state __dec_zone_page_state
278 #define mod_zone_page_state __mod_zone_page_state
280 static inline void refresh_cpu_vm_stats(int cpu
) { }
283 #endif /* _LINUX_VMSTAT_H */