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git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - include/linux/vmstat.h
1 #ifndef _LINUX_VMSTAT_H
2 #define _LINUX_VMSTAT_H
4 #include <linux/types.h>
5 #include <linux/percpu.h>
6 #include <linux/config.h>
7 #include <linux/mmzone.h>
8 #include <asm/atomic.h>
11 * Global page accounting. One instance per CPU. Only unsigned longs are
14 * - Fields can be modified with xxx_page_state and xxx_page_state_zone at
15 * any time safely (which protects the instance from modification by
17 * - The __xxx_page_state variants can be used safely when interrupts are
19 * - The __xxx_page_state variants can be used if the field is only
20 * modified from process context and protected from preemption, or only
21 * modified from interrupt context. In this case, the field should be
25 unsigned long pgpgin
; /* Disk reads */
26 unsigned long pgpgout
; /* Disk writes */
27 unsigned long pswpin
; /* swap reads */
28 unsigned long pswpout
; /* swap writes */
30 unsigned long pgalloc_high
; /* page allocations */
31 unsigned long pgalloc_normal
;
32 unsigned long pgalloc_dma32
;
33 unsigned long pgalloc_dma
;
35 unsigned long pgfree
; /* page freeings */
36 unsigned long pgactivate
; /* pages moved inactive->active */
37 unsigned long pgdeactivate
; /* pages moved active->inactive */
39 unsigned long pgfault
; /* faults (major+minor) */
40 unsigned long pgmajfault
; /* faults (major only) */
42 unsigned long pgrefill_high
; /* inspected in refill_inactive_zone */
43 unsigned long pgrefill_normal
;
44 unsigned long pgrefill_dma32
;
45 unsigned long pgrefill_dma
;
47 unsigned long pgsteal_high
; /* total highmem pages reclaimed */
48 unsigned long pgsteal_normal
;
49 unsigned long pgsteal_dma32
;
50 unsigned long pgsteal_dma
;
52 unsigned long pgscan_kswapd_high
;/* total highmem pages scanned */
53 unsigned long pgscan_kswapd_normal
;
54 unsigned long pgscan_kswapd_dma32
;
55 unsigned long pgscan_kswapd_dma
;
57 unsigned long pgscan_direct_high
;/* total highmem pages scanned */
58 unsigned long pgscan_direct_normal
;
59 unsigned long pgscan_direct_dma32
;
60 unsigned long pgscan_direct_dma
;
62 unsigned long pginodesteal
; /* pages reclaimed via inode freeing */
63 unsigned long slabs_scanned
; /* slab objects scanned */
64 unsigned long kswapd_steal
; /* pages reclaimed by kswapd */
65 unsigned long kswapd_inodesteal
;/* reclaimed via kswapd inode freeing */
66 unsigned long pageoutrun
; /* kswapd's calls to page reclaim */
67 unsigned long allocstall
; /* direct reclaim calls */
69 unsigned long pgrotated
; /* pages rotated to tail of the LRU */
72 extern void get_full_page_state(struct page_state
*ret
);
73 extern unsigned long read_page_state_offset(unsigned long offset
);
74 extern void mod_page_state_offset(unsigned long offset
, unsigned long delta
);
75 extern void __mod_page_state_offset(unsigned long offset
, unsigned long delta
);
77 #define read_page_state(member) \
78 read_page_state_offset(offsetof(struct page_state, member))
80 #define mod_page_state(member, delta) \
81 mod_page_state_offset(offsetof(struct page_state, member), (delta))
83 #define __mod_page_state(member, delta) \
84 __mod_page_state_offset(offsetof(struct page_state, member), (delta))
86 #define inc_page_state(member) mod_page_state(member, 1UL)
87 #define dec_page_state(member) mod_page_state(member, 0UL - 1)
88 #define add_page_state(member,delta) mod_page_state(member, (delta))
89 #define sub_page_state(member,delta) mod_page_state(member, 0UL - (delta))
91 #define __inc_page_state(member) __mod_page_state(member, 1UL)
92 #define __dec_page_state(member) __mod_page_state(member, 0UL - 1)
93 #define __add_page_state(member,delta) __mod_page_state(member, (delta))
94 #define __sub_page_state(member,delta) __mod_page_state(member, 0UL - (delta))
96 #define page_state(member) (*__page_state(offsetof(struct page_state, member)))
98 #define state_zone_offset(zone, member) \
101 if (is_highmem(zone)) \
102 offset = offsetof(struct page_state, member##_high); \
103 else if (is_normal(zone)) \
104 offset = offsetof(struct page_state, member##_normal); \
105 else if (is_dma32(zone)) \
106 offset = offsetof(struct page_state, member##_dma32); \
108 offset = offsetof(struct page_state, member##_dma); \
112 #define __mod_page_state_zone(zone, member, delta) \
114 __mod_page_state_offset(state_zone_offset(zone, member), (delta)); \
117 #define mod_page_state_zone(zone, member, delta) \
119 mod_page_state_offset(state_zone_offset(zone, member), (delta)); \
122 DECLARE_PER_CPU(struct page_state
, page_states
);
125 * Zone based page accounting with per cpu differentials.
127 extern atomic_long_t vm_stat
[NR_VM_ZONE_STAT_ITEMS
];
129 static inline void zone_page_state_add(long x
, struct zone
*zone
,
130 enum zone_stat_item item
)
132 atomic_long_add(x
, &zone
->vm_stat
[item
]);
133 atomic_long_add(x
, &vm_stat
[item
]);
136 static inline unsigned long global_page_state(enum zone_stat_item item
)
138 long x
= atomic_long_read(&vm_stat
[item
]);
146 static inline unsigned long zone_page_state(struct zone
*zone
,
147 enum zone_stat_item item
)
149 long x
= atomic_long_read(&zone
->vm_stat
[item
]);
159 * Determine the per node value of a stat item. This function
160 * is called frequently in a NUMA machine, so try to be as
161 * frugal as possible.
163 static inline unsigned long node_page_state(int node
,
164 enum zone_stat_item item
)
166 struct zone
*zones
= NODE_DATA(node
)->node_zones
;
169 #ifndef CONFIG_DMA_IS_NORMAL
170 #if !defined(CONFIG_DMA_IS_DMA32) && BITS_PER_LONG >= 64
171 zone_page_state(&zones
[ZONE_DMA32
], item
) +
173 zone_page_state(&zones
[ZONE_NORMAL
], item
) +
175 #ifdef CONFIG_HIGHMEM
176 zone_page_state(&zones
[ZONE_HIGHMEM
], item
) +
178 zone_page_state(&zones
[ZONE_DMA
], item
);
181 #define node_page_state(node, item) global_page_state(item)
184 #define __add_zone_page_state(__z, __i, __d) \
185 __mod_zone_page_state(__z, __i, __d)
186 #define __sub_zone_page_state(__z, __i, __d) \
187 __mod_zone_page_state(__z, __i,-(__d))
189 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
190 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
192 static inline void zap_zone_vm_stats(struct zone
*zone
)
194 memset(zone
->vm_stat
, 0, sizeof(zone
->vm_stat
));
198 void __mod_zone_page_state(struct zone
*, enum zone_stat_item item
, int);
199 void __inc_zone_page_state(struct page
*, enum zone_stat_item
);
200 void __dec_zone_page_state(struct page
*, enum zone_stat_item
);
202 void mod_zone_page_state(struct zone
*, enum zone_stat_item
, int);
203 void inc_zone_page_state(struct page
*, enum zone_stat_item
);
204 void dec_zone_page_state(struct page
*, enum zone_stat_item
);
206 extern void inc_zone_state(struct zone
*, enum zone_stat_item
);
208 void refresh_cpu_vm_stats(int);
209 void refresh_vm_stats(void);
211 #else /* CONFIG_SMP */
214 * We do not maintain differentials in a single processor configuration.
215 * The functions directly modify the zone and global counters.
217 static inline void __mod_zone_page_state(struct zone
*zone
,
218 enum zone_stat_item item
, int delta
)
220 zone_page_state_add(delta
, zone
, item
);
223 static inline void __inc_zone_page_state(struct page
*page
,
224 enum zone_stat_item item
)
226 atomic_long_inc(&page_zone(page
)->vm_stat
[item
]);
227 atomic_long_inc(&vm_stat
[item
]);
230 static inline void __dec_zone_page_state(struct page
*page
,
231 enum zone_stat_item item
)
233 atomic_long_dec(&page_zone(page
)->vm_stat
[item
]);
234 atomic_long_dec(&vm_stat
[item
]);
238 * We only use atomic operations to update counters. So there is no need to
239 * disable interrupts.
241 #define inc_zone_page_state __inc_zone_page_state
242 #define dec_zone_page_state __dec_zone_page_state
243 #define mod_zone_page_state __mod_zone_page_state
245 static inline void refresh_cpu_vm_stats(int cpu
) { }
246 static inline void refresh_vm_stats(void) { }
249 #endif /* _LINUX_VMSTAT_H */