Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_VMSTAT_H |
| 2 | #define _LINUX_VMSTAT_H |
| 3 | |
| 4 | #include <linux/types.h> |
| 5 | #include <linux/percpu.h> |
Christoph Lameter | 9617729 | 2007-02-10 01:43:03 -0800 | [diff] [blame] | 6 | #include <linux/mm.h> |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 7 | #include <linux/mmzone.h> |
| 8 | #include <asm/atomic.h> |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 9 | |
Christoph Lameter | 4b51d66 | 2007-02-10 01:43:10 -0800 | [diff] [blame] | 10 | #ifdef CONFIG_ZONE_DMA |
| 11 | #define DMA_ZONE(xx) xx##_DMA, |
| 12 | #else |
| 13 | #define DMA_ZONE(xx) |
| 14 | #endif |
| 15 | |
Christoph Lameter | 27bf71c | 2006-09-25 23:31:15 -0700 | [diff] [blame] | 16 | #ifdef CONFIG_ZONE_DMA32 |
| 17 | #define DMA32_ZONE(xx) xx##_DMA32, |
| 18 | #else |
| 19 | #define DMA32_ZONE(xx) |
| 20 | #endif |
| 21 | |
| 22 | #ifdef CONFIG_HIGHMEM |
| 23 | #define HIGHMEM_ZONE(xx) , xx##_HIGH |
| 24 | #else |
| 25 | #define HIGHMEM_ZONE(xx) |
| 26 | #endif |
| 27 | |
Adam Litke | 3b11630 | 2008-04-28 02:13:06 -0700 | [diff] [blame] | 28 | |
Mel Gorman | 2a1e274 | 2007-07-17 04:03:12 -0700 | [diff] [blame] | 29 | #define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 30 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 31 | enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, |
| 32 | FOR_ALL_ZONES(PGALLOC), |
| 33 | PGFREE, PGACTIVATE, PGDEACTIVATE, |
| 34 | PGFAULT, PGMAJFAULT, |
| 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, |
Adam Litke | 3b11630 | 2008-04-28 02:13:06 -0700 | [diff] [blame] | 41 | #ifdef CONFIG_HUGETLB_PAGE |
| 42 | HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, |
| 43 | #endif |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 44 | NR_VM_EVENT_ITEMS |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 45 | }; |
| 46 | |
Andrew Morton | 780a065 | 2007-02-10 01:44:41 -0800 | [diff] [blame] | 47 | #ifdef CONFIG_VM_EVENT_COUNTERS |
| 48 | /* |
| 49 | * Light weight per cpu counter implementation. |
| 50 | * |
| 51 | * Counters should only be incremented and no critical kernel component |
| 52 | * should rely on the counter values. |
| 53 | * |
| 54 | * Counters are handled completely inline. On many platforms the code |
| 55 | * generated will simply be the increment of a global address. |
| 56 | */ |
| 57 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 58 | struct vm_event_state { |
| 59 | unsigned long event[NR_VM_EVENT_ITEMS]; |
| 60 | }; |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 61 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 62 | DECLARE_PER_CPU(struct vm_event_state, vm_event_states); |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 63 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 64 | static inline void __count_vm_event(enum vm_event_item item) |
| 65 | { |
Jan Blunck | 38cbcdc | 2006-08-05 12:14:14 -0700 | [diff] [blame] | 66 | __get_cpu_var(vm_event_states).event[item]++; |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 67 | } |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 68 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 69 | static inline void count_vm_event(enum vm_event_item item) |
| 70 | { |
Jan Blunck | 38cbcdc | 2006-08-05 12:14:14 -0700 | [diff] [blame] | 71 | get_cpu_var(vm_event_states).event[item]++; |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 72 | put_cpu(); |
| 73 | } |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 74 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 75 | static inline void __count_vm_events(enum vm_event_item item, long delta) |
| 76 | { |
Jan Blunck | 38cbcdc | 2006-08-05 12:14:14 -0700 | [diff] [blame] | 77 | __get_cpu_var(vm_event_states).event[item] += delta; |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 78 | } |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 79 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 80 | static inline void count_vm_events(enum vm_event_item item, long delta) |
| 81 | { |
Jan Blunck | 38cbcdc | 2006-08-05 12:14:14 -0700 | [diff] [blame] | 82 | get_cpu_var(vm_event_states).event[item] += delta; |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 83 | put_cpu(); |
| 84 | } |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 85 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 86 | extern void all_vm_events(unsigned long *); |
Magnus Damm | e903387 | 2006-12-22 01:08:01 -0800 | [diff] [blame] | 87 | #ifdef CONFIG_HOTPLUG |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 88 | extern void vm_events_fold_cpu(int cpu); |
Magnus Damm | e903387 | 2006-12-22 01:08:01 -0800 | [diff] [blame] | 89 | #else |
| 90 | static inline void vm_events_fold_cpu(int cpu) |
| 91 | { |
| 92 | } |
| 93 | #endif |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 94 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 95 | #else |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 96 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 97 | /* Disable counters */ |
Andrew Morton | 780a065 | 2007-02-10 01:44:41 -0800 | [diff] [blame] | 98 | static inline void count_vm_event(enum vm_event_item item) |
| 99 | { |
| 100 | } |
| 101 | static inline void count_vm_events(enum vm_event_item item, long delta) |
| 102 | { |
| 103 | } |
| 104 | static inline void __count_vm_event(enum vm_event_item item) |
| 105 | { |
| 106 | } |
| 107 | static inline void __count_vm_events(enum vm_event_item item, long delta) |
| 108 | { |
| 109 | } |
| 110 | static inline void all_vm_events(unsigned long *ret) |
| 111 | { |
| 112 | } |
| 113 | static inline void vm_events_fold_cpu(int cpu) |
| 114 | { |
| 115 | } |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 116 | |
Christoph Lameter | f8891e5 | 2006-06-30 01:55:45 -0700 | [diff] [blame] | 117 | #endif /* CONFIG_VM_EVENT_COUNTERS */ |
| 118 | |
| 119 | #define __count_zone_vm_events(item, zone, delta) \ |
Christoph Lameter | 4b51d66 | 2007-02-10 01:43:10 -0800 | [diff] [blame] | 120 | __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ |
| 121 | zone_idx(zone), delta) |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 122 | |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 123 | /* |
| 124 | * Zone based page accounting with per cpu differentials. |
| 125 | */ |
| 126 | extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; |
Christoph Lameter | f6ac235 | 2006-06-30 01:55:32 -0700 | [diff] [blame] | 127 | |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 128 | static inline void zone_page_state_add(long x, struct zone *zone, |
| 129 | enum zone_stat_item item) |
| 130 | { |
| 131 | atomic_long_add(x, &zone->vm_stat[item]); |
| 132 | atomic_long_add(x, &vm_stat[item]); |
| 133 | } |
| 134 | |
| 135 | static inline unsigned long global_page_state(enum zone_stat_item item) |
| 136 | { |
| 137 | long x = atomic_long_read(&vm_stat[item]); |
| 138 | #ifdef CONFIG_SMP |
| 139 | if (x < 0) |
| 140 | x = 0; |
| 141 | #endif |
| 142 | return x; |
| 143 | } |
| 144 | |
| 145 | static inline unsigned long zone_page_state(struct zone *zone, |
| 146 | enum zone_stat_item item) |
| 147 | { |
| 148 | long x = atomic_long_read(&zone->vm_stat[item]); |
| 149 | #ifdef CONFIG_SMP |
| 150 | if (x < 0) |
| 151 | x = 0; |
| 152 | #endif |
| 153 | return x; |
| 154 | } |
| 155 | |
| 156 | #ifdef CONFIG_NUMA |
| 157 | /* |
| 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. |
| 161 | */ |
| 162 | static inline unsigned long node_page_state(int node, |
| 163 | enum zone_stat_item item) |
| 164 | { |
| 165 | struct zone *zones = NODE_DATA(node)->node_zones; |
| 166 | |
| 167 | return |
Christoph Lameter | 4b51d66 | 2007-02-10 01:43:10 -0800 | [diff] [blame] | 168 | #ifdef CONFIG_ZONE_DMA |
| 169 | zone_page_state(&zones[ZONE_DMA], item) + |
| 170 | #endif |
Christoph Lameter | fb0e794 | 2006-09-25 23:31:13 -0700 | [diff] [blame] | 171 | #ifdef CONFIG_ZONE_DMA32 |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 172 | zone_page_state(&zones[ZONE_DMA32], item) + |
| 173 | #endif |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 174 | #ifdef CONFIG_HIGHMEM |
| 175 | zone_page_state(&zones[ZONE_HIGHMEM], item) + |
| 176 | #endif |
Mel Gorman | 2a1e274 | 2007-07-17 04:03:12 -0700 | [diff] [blame] | 177 | zone_page_state(&zones[ZONE_NORMAL], item) + |
| 178 | zone_page_state(&zones[ZONE_MOVABLE], item); |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 179 | } |
Christoph Lameter | ca889e6 | 2006-06-30 01:55:44 -0700 | [diff] [blame] | 180 | |
Mel Gorman | 18ea7e7 | 2008-04-28 02:12:14 -0700 | [diff] [blame] | 181 | extern void zone_statistics(struct zone *, struct zone *); |
Christoph Lameter | ca889e6 | 2006-06-30 01:55:44 -0700 | [diff] [blame] | 182 | |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 183 | #else |
Christoph Lameter | ca889e6 | 2006-06-30 01:55:44 -0700 | [diff] [blame] | 184 | |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 185 | #define node_page_state(node, item) global_page_state(item) |
Christoph Lameter | ca889e6 | 2006-06-30 01:55:44 -0700 | [diff] [blame] | 186 | #define zone_statistics(_zl,_z) do { } while (0) |
| 187 | |
| 188 | #endif /* CONFIG_NUMA */ |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 189 | |
| 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)) |
| 194 | |
| 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)) |
| 197 | |
| 198 | static inline void zap_zone_vm_stats(struct zone *zone) |
| 199 | { |
| 200 | memset(zone->vm_stat, 0, sizeof(zone->vm_stat)); |
| 201 | } |
| 202 | |
Christoph Lameter | ca889e6 | 2006-06-30 01:55:44 -0700 | [diff] [blame] | 203 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
| 204 | |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 205 | #ifdef CONFIG_SMP |
| 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); |
| 209 | |
| 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); |
| 213 | |
| 214 | extern void inc_zone_state(struct zone *, enum zone_stat_item); |
Christoph Lameter | c878538 | 2007-02-10 01:43:01 -0800 | [diff] [blame] | 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); |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 218 | |
| 219 | void refresh_cpu_vm_stats(int); |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 220 | #else /* CONFIG_SMP */ |
| 221 | |
| 222 | /* |
| 223 | * We do not maintain differentials in a single processor configuration. |
| 224 | * The functions directly modify the zone and global counters. |
| 225 | */ |
| 226 | static inline void __mod_zone_page_state(struct zone *zone, |
| 227 | enum zone_stat_item item, int delta) |
| 228 | { |
| 229 | zone_page_state_add(delta, zone, item); |
| 230 | } |
| 231 | |
Christoph Lameter | 7f4599e | 2006-07-10 04:44:30 -0700 | [diff] [blame] | 232 | static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
| 233 | { |
| 234 | atomic_long_inc(&zone->vm_stat[item]); |
| 235 | atomic_long_inc(&vm_stat[item]); |
| 236 | } |
| 237 | |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 238 | static inline void __inc_zone_page_state(struct page *page, |
| 239 | enum zone_stat_item item) |
| 240 | { |
Christoph Lameter | 7f4599e | 2006-07-10 04:44:30 -0700 | [diff] [blame] | 241 | __inc_zone_state(page_zone(page), item); |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 242 | } |
| 243 | |
Christoph Lameter | c878538 | 2007-02-10 01:43:01 -0800 | [diff] [blame] | 244 | static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
| 245 | { |
| 246 | atomic_long_dec(&zone->vm_stat[item]); |
| 247 | atomic_long_dec(&vm_stat[item]); |
| 248 | } |
| 249 | |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 250 | static inline void __dec_zone_page_state(struct page *page, |
| 251 | enum zone_stat_item item) |
| 252 | { |
Uwe Kleine-König | 57ce36f | 2008-02-25 16:45:03 +0100 | [diff] [blame] | 253 | __dec_zone_state(page_zone(page), item); |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | /* |
| 257 | * We only use atomic operations to update counters. So there is no need to |
| 258 | * disable interrupts. |
| 259 | */ |
| 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 |
| 263 | |
| 264 | static inline void refresh_cpu_vm_stats(int cpu) { } |
Christoph Lameter | 2244b95 | 2006-06-30 01:55:33 -0700 | [diff] [blame] | 265 | #endif |
| 266 | |
| 267 | #endif /* _LINUX_VMSTAT_H */ |