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 UNEVICTABLE_PGCULLED
, /* culled to noreclaim list */
45 UNEVICTABLE_PGSCANNED
, /* scanned for reclaimability */
46 UNEVICTABLE_PGRESCUED
, /* rescued from noreclaim list */
47 UNEVICTABLE_PGMLOCKED
,
48 UNEVICTABLE_PGMUNLOCKED
,
49 UNEVICTABLE_PGCLEARED
, /* on COW, page truncate */
50 UNEVICTABLE_PGSTRANDED
, /* unable to isolate on unlock */
51 UNEVICTABLE_MLOCKFREED
,
55 extern int sysctl_stat_interval
;
57 #ifdef CONFIG_VM_EVENT_COUNTERS
59 * Light weight per cpu counter implementation.
61 * Counters should only be incremented and no critical kernel component
62 * should rely on the counter values.
64 * Counters are handled completely inline. On many platforms the code
65 * generated will simply be the increment of a global address.
68 struct vm_event_state
{
69 unsigned long event
[NR_VM_EVENT_ITEMS
];
72 DECLARE_PER_CPU(struct vm_event_state
, vm_event_states
);
74 static inline void __count_vm_event(enum vm_event_item item
)
76 __get_cpu_var(vm_event_states
).event
[item
]++;
79 static inline void count_vm_event(enum vm_event_item item
)
81 get_cpu_var(vm_event_states
).event
[item
]++;
85 static inline void __count_vm_events(enum vm_event_item item
, long delta
)
87 __get_cpu_var(vm_event_states
).event
[item
] += delta
;
90 static inline void count_vm_events(enum vm_event_item item
, long delta
)
92 get_cpu_var(vm_event_states
).event
[item
] += delta
;
96 extern void all_vm_events(unsigned long *);
98 extern void vm_events_fold_cpu(int cpu
);
100 static inline void vm_events_fold_cpu(int cpu
)
107 /* Disable counters */
108 static inline void count_vm_event(enum vm_event_item item
)
111 static inline void count_vm_events(enum vm_event_item item
, long delta
)
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 all_vm_events(unsigned long *ret
)
123 static inline void vm_events_fold_cpu(int cpu
)
127 #endif /* CONFIG_VM_EVENT_COUNTERS */
129 #define __count_zone_vm_events(item, zone, delta) \
130 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
131 zone_idx(zone), delta)
134 * Zone based page accounting with per cpu differentials.
136 extern atomic_long_t vm_stat
[NR_VM_ZONE_STAT_ITEMS
];
138 static inline void zone_page_state_add(long x
, struct zone
*zone
,
139 enum zone_stat_item item
)
141 atomic_long_add(x
, &zone
->vm_stat
[item
]);
142 atomic_long_add(x
, &vm_stat
[item
]);
145 static inline unsigned long global_page_state(enum zone_stat_item item
)
147 long x
= atomic_long_read(&vm_stat
[item
]);
155 static inline unsigned long zone_page_state(struct zone
*zone
,
156 enum zone_stat_item item
)
158 long x
= atomic_long_read(&zone
->vm_stat
[item
]);
166 extern unsigned long global_lru_pages(void);
168 static inline unsigned long zone_lru_pages(struct zone
*zone
)
170 return (zone_page_state(zone
, NR_ACTIVE_ANON
)
171 + zone_page_state(zone
, NR_ACTIVE_FILE
)
172 + zone_page_state(zone
, NR_INACTIVE_ANON
)
173 + zone_page_state(zone
, NR_INACTIVE_FILE
));
178 * Determine the per node value of a stat item. This function
179 * is called frequently in a NUMA machine, so try to be as
180 * frugal as possible.
182 static inline unsigned long node_page_state(int node
,
183 enum zone_stat_item item
)
185 struct zone
*zones
= NODE_DATA(node
)->node_zones
;
188 #ifdef CONFIG_ZONE_DMA
189 zone_page_state(&zones
[ZONE_DMA
], item
) +
191 #ifdef CONFIG_ZONE_DMA32
192 zone_page_state(&zones
[ZONE_DMA32
], item
) +
194 #ifdef CONFIG_HIGHMEM
195 zone_page_state(&zones
[ZONE_HIGHMEM
], item
) +
197 zone_page_state(&zones
[ZONE_NORMAL
], item
) +
198 zone_page_state(&zones
[ZONE_MOVABLE
], item
);
201 extern void zone_statistics(struct zone
*, struct zone
*);
205 #define node_page_state(node, item) global_page_state(item)
206 #define zone_statistics(_zl,_z) do { } while (0)
208 #endif /* CONFIG_NUMA */
210 #define __add_zone_page_state(__z, __i, __d) \
211 __mod_zone_page_state(__z, __i, __d)
212 #define __sub_zone_page_state(__z, __i, __d) \
213 __mod_zone_page_state(__z, __i,-(__d))
215 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
216 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
218 static inline void zap_zone_vm_stats(struct zone
*zone
)
220 memset(zone
->vm_stat
, 0, sizeof(zone
->vm_stat
));
223 extern void inc_zone_state(struct zone
*, enum zone_stat_item
);
226 void __mod_zone_page_state(struct zone
*, enum zone_stat_item 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 void mod_zone_page_state(struct zone
*, enum zone_stat_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 extern void inc_zone_state(struct zone
*, enum zone_stat_item
);
235 extern void __inc_zone_state(struct zone
*, enum zone_stat_item
);
236 extern void dec_zone_state(struct zone
*, enum zone_stat_item
);
237 extern void __dec_zone_state(struct zone
*, enum zone_stat_item
);
239 void refresh_cpu_vm_stats(int);
240 #else /* CONFIG_SMP */
243 * We do not maintain differentials in a single processor configuration.
244 * The functions directly modify the zone and global counters.
246 static inline void __mod_zone_page_state(struct zone
*zone
,
247 enum zone_stat_item item
, int delta
)
249 zone_page_state_add(delta
, zone
, item
);
252 static inline void __inc_zone_state(struct zone
*zone
, enum zone_stat_item item
)
254 atomic_long_inc(&zone
->vm_stat
[item
]);
255 atomic_long_inc(&vm_stat
[item
]);
258 static inline void __inc_zone_page_state(struct page
*page
,
259 enum zone_stat_item item
)
261 __inc_zone_state(page_zone(page
), item
);
264 static inline void __dec_zone_state(struct zone
*zone
, enum zone_stat_item item
)
266 atomic_long_dec(&zone
->vm_stat
[item
]);
267 atomic_long_dec(&vm_stat
[item
]);
270 static inline void __dec_zone_page_state(struct page
*page
,
271 enum zone_stat_item item
)
273 __dec_zone_state(page_zone(page
), item
);
277 * We only use atomic operations to update counters. So there is no need to
278 * disable interrupts.
280 #define inc_zone_page_state __inc_zone_page_state
281 #define dec_zone_page_state __dec_zone_page_state
282 #define mod_zone_page_state __mod_zone_page_state
284 static inline void refresh_cpu_vm_stats(int cpu
) { }
287 #endif /* _LINUX_VMSTAT_H */