1 #ifndef _LINUX_VMSTAT_H 2 #define _LINUX_VMSTAT_H 3 4 #include <linux/types.h> 5 #include <linux/percpu.h> 6 #include <linux/mm.h> 7 #include <linux/mmzone.h> 8 #include <asm/atomic.h> 9 10 #ifdef CONFIG_ZONE_DMA 11 #define DMA_ZONE(xx) xx##_DMA, 12 #else 13 #define DMA_ZONE(xx) 14 #endif 15 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 28 29 #define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE 30 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 #ifdef CONFIG_NUMA 40 PGSCAN_ZONE_RECLAIM_FAILED, 41 #endif 42 PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL, 43 PAGEOUTRUN, ALLOCSTALL, PGROTATED, 44 #ifdef CONFIG_HUGETLB_PAGE 45 HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, 46 #endif 47 UNEVICTABLE_PGCULLED, /* culled to noreclaim list */ 48 UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */ 49 UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */ 50 UNEVICTABLE_PGMLOCKED, 51 UNEVICTABLE_PGMUNLOCKED, 52 UNEVICTABLE_PGCLEARED, /* on COW, page truncate */ 53 UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */ 54 UNEVICTABLE_MLOCKFREED, 55 NR_VM_EVENT_ITEMS 56 }; 57 58 extern int sysctl_stat_interval; 59 60 #ifdef CONFIG_VM_EVENT_COUNTERS 61 /* 62 * Light weight per cpu counter implementation. 63 * 64 * Counters should only be incremented and no critical kernel component 65 * should rely on the counter values. 66 * 67 * Counters are handled completely inline. On many platforms the code 68 * generated will simply be the increment of a global address. 69 */ 70 71 struct vm_event_state { 72 unsigned long event[NR_VM_EVENT_ITEMS]; 73 }; 74 75 DECLARE_PER_CPU(struct vm_event_state, vm_event_states); 76 77 static inline void __count_vm_event(enum vm_event_item item) 78 { 79 __get_cpu_var(vm_event_states).event[item]++; 80 } 81 82 static inline void count_vm_event(enum vm_event_item item) 83 { 84 get_cpu_var(vm_event_states).event[item]++; 85 put_cpu(); 86 } 87 88 static inline void __count_vm_events(enum vm_event_item item, long delta) 89 { 90 __get_cpu_var(vm_event_states).event[item] += delta; 91 } 92 93 static inline void count_vm_events(enum vm_event_item item, long delta) 94 { 95 get_cpu_var(vm_event_states).event[item] += delta; 96 put_cpu(); 97 } 98 99 extern void all_vm_events(unsigned long *); 100 #ifdef CONFIG_HOTPLUG 101 extern void vm_events_fold_cpu(int cpu); 102 #else 103 static inline void vm_events_fold_cpu(int cpu) 104 { 105 } 106 #endif 107 108 #else 109 110 /* Disable counters */ 111 static inline void count_vm_event(enum vm_event_item item) 112 { 113 } 114 static inline void count_vm_events(enum vm_event_item item, long delta) 115 { 116 } 117 static inline void __count_vm_event(enum vm_event_item item) 118 { 119 } 120 static inline void __count_vm_events(enum vm_event_item item, long delta) 121 { 122 } 123 static inline void all_vm_events(unsigned long *ret) 124 { 125 } 126 static inline void vm_events_fold_cpu(int cpu) 127 { 128 } 129 130 #endif /* CONFIG_VM_EVENT_COUNTERS */ 131 132 #define __count_zone_vm_events(item, zone, delta) \ 133 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ 134 zone_idx(zone), delta) 135 136 /* 137 * Zone based page accounting with per cpu differentials. 138 */ 139 extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; 140 141 static inline void zone_page_state_add(long x, struct zone *zone, 142 enum zone_stat_item item) 143 { 144 atomic_long_add(x, &zone->vm_stat[item]); 145 atomic_long_add(x, &vm_stat[item]); 146 } 147 148 static inline unsigned long global_page_state(enum zone_stat_item item) 149 { 150 long x = atomic_long_read(&vm_stat[item]); 151 #ifdef CONFIG_SMP 152 if (x < 0) 153 x = 0; 154 #endif 155 return x; 156 } 157 158 static inline unsigned long zone_page_state(struct zone *zone, 159 enum zone_stat_item item) 160 { 161 long x = atomic_long_read(&zone->vm_stat[item]); 162 #ifdef CONFIG_SMP 163 if (x < 0) 164 x = 0; 165 #endif 166 return x; 167 } 168 169 extern unsigned long global_lru_pages(void); 170 171 static inline unsigned long zone_lru_pages(struct zone *zone) 172 { 173 return (zone_page_state(zone, NR_ACTIVE_ANON) 174 + zone_page_state(zone, NR_ACTIVE_FILE) 175 + zone_page_state(zone, NR_INACTIVE_ANON) 176 + zone_page_state(zone, NR_INACTIVE_FILE)); 177 } 178 179 #ifdef CONFIG_NUMA 180 /* 181 * Determine the per node value of a stat item. This function 182 * is called frequently in a NUMA machine, so try to be as 183 * frugal as possible. 184 */ 185 static inline unsigned long node_page_state(int node, 186 enum zone_stat_item item) 187 { 188 struct zone *zones = NODE_DATA(node)->node_zones; 189 190 return 191 #ifdef CONFIG_ZONE_DMA 192 zone_page_state(&zones[ZONE_DMA], item) + 193 #endif 194 #ifdef CONFIG_ZONE_DMA32 195 zone_page_state(&zones[ZONE_DMA32], item) + 196 #endif 197 #ifdef CONFIG_HIGHMEM 198 zone_page_state(&zones[ZONE_HIGHMEM], item) + 199 #endif 200 zone_page_state(&zones[ZONE_NORMAL], item) + 201 zone_page_state(&zones[ZONE_MOVABLE], item); 202 } 203 204 extern void zone_statistics(struct zone *, struct zone *); 205 206 #else 207 208 #define node_page_state(node, item) global_page_state(item) 209 #define zone_statistics(_zl,_z) do { } while (0) 210 211 #endif /* CONFIG_NUMA */ 212 213 #define __add_zone_page_state(__z, __i, __d) \ 214 __mod_zone_page_state(__z, __i, __d) 215 #define __sub_zone_page_state(__z, __i, __d) \ 216 __mod_zone_page_state(__z, __i,-(__d)) 217 218 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d) 219 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d)) 220 221 static inline void zap_zone_vm_stats(struct zone *zone) 222 { 223 memset(zone->vm_stat, 0, sizeof(zone->vm_stat)); 224 } 225 226 extern void inc_zone_state(struct zone *, enum zone_stat_item); 227 228 #ifdef CONFIG_SMP 229 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int); 230 void __inc_zone_page_state(struct page *, enum zone_stat_item); 231 void __dec_zone_page_state(struct page *, enum zone_stat_item); 232 233 void mod_zone_page_state(struct zone *, enum zone_stat_item, int); 234 void inc_zone_page_state(struct page *, enum zone_stat_item); 235 void dec_zone_page_state(struct page *, enum zone_stat_item); 236 237 extern void inc_zone_state(struct zone *, enum zone_stat_item); 238 extern void __inc_zone_state(struct zone *, enum zone_stat_item); 239 extern void dec_zone_state(struct zone *, enum zone_stat_item); 240 extern void __dec_zone_state(struct zone *, enum zone_stat_item); 241 242 void refresh_cpu_vm_stats(int); 243 #else /* CONFIG_SMP */ 244 245 /* 246 * We do not maintain differentials in a single processor configuration. 247 * The functions directly modify the zone and global counters. 248 */ 249 static inline void __mod_zone_page_state(struct zone *zone, 250 enum zone_stat_item item, int delta) 251 { 252 zone_page_state_add(delta, zone, item); 253 } 254 255 static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) 256 { 257 atomic_long_inc(&zone->vm_stat[item]); 258 atomic_long_inc(&vm_stat[item]); 259 } 260 261 static inline void __inc_zone_page_state(struct page *page, 262 enum zone_stat_item item) 263 { 264 __inc_zone_state(page_zone(page), item); 265 } 266 267 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) 268 { 269 atomic_long_dec(&zone->vm_stat[item]); 270 atomic_long_dec(&vm_stat[item]); 271 } 272 273 static inline void __dec_zone_page_state(struct page *page, 274 enum zone_stat_item item) 275 { 276 __dec_zone_state(page_zone(page), item); 277 } 278 279 /* 280 * We only use atomic operations to update counters. So there is no need to 281 * disable interrupts. 282 */ 283 #define inc_zone_page_state __inc_zone_page_state 284 #define dec_zone_page_state __dec_zone_page_state 285 #define mod_zone_page_state __mod_zone_page_state 286 287 static inline void refresh_cpu_vm_stats(int cpu) { } 288 #endif 289 290 #endif /* _LINUX_VMSTAT_H */ 291