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 */