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 PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL, 40 PAGEOUTRUN, ALLOCSTALL, PGROTATED, 41 #ifdef CONFIG_HUGETLB_PAGE 42 HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, 43 #endif 44 NR_VM_EVENT_ITEMS 45 }; 46 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 58 struct vm_event_state { 59 unsigned long event[NR_VM_EVENT_ITEMS]; 60 }; 61 62 DECLARE_PER_CPU(struct vm_event_state, vm_event_states); 63 64 static inline void __count_vm_event(enum vm_event_item item) 65 { 66 __get_cpu_var(vm_event_states).event[item]++; 67 } 68 69 static inline void count_vm_event(enum vm_event_item item) 70 { 71 get_cpu_var(vm_event_states).event[item]++; 72 put_cpu(); 73 } 74 75 static inline void __count_vm_events(enum vm_event_item item, long delta) 76 { 77 __get_cpu_var(vm_event_states).event[item] += delta; 78 } 79 80 static inline void count_vm_events(enum vm_event_item item, long delta) 81 { 82 get_cpu_var(vm_event_states).event[item] += delta; 83 put_cpu(); 84 } 85 86 extern void all_vm_events(unsigned long *); 87 #ifdef CONFIG_HOTPLUG 88 extern void vm_events_fold_cpu(int cpu); 89 #else 90 static inline void vm_events_fold_cpu(int cpu) 91 { 92 } 93 #endif 94 95 #else 96 97 /* Disable counters */ 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 } 116 117 #endif /* CONFIG_VM_EVENT_COUNTERS */ 118 119 #define __count_zone_vm_events(item, zone, delta) \ 120 __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ 121 zone_idx(zone), delta) 122 123 /* 124 * Zone based page accounting with per cpu differentials. 125 */ 126 extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; 127 128 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 168 #ifdef CONFIG_ZONE_DMA 169 zone_page_state(&zones[ZONE_DMA], item) + 170 #endif 171 #ifdef CONFIG_ZONE_DMA32 172 zone_page_state(&zones[ZONE_DMA32], item) + 173 #endif 174 #ifdef CONFIG_HIGHMEM 175 zone_page_state(&zones[ZONE_HIGHMEM], item) + 176 #endif 177 zone_page_state(&zones[ZONE_NORMAL], item) + 178 zone_page_state(&zones[ZONE_MOVABLE], item); 179 } 180 181 extern void zone_statistics(struct zone *, struct zone *); 182 183 #else 184 185 #define node_page_state(node, item) global_page_state(item) 186 #define zone_statistics(_zl,_z) do { } while (0) 187 188 #endif /* CONFIG_NUMA */ 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 } 202 203 extern void inc_zone_state(struct zone *, enum zone_stat_item); 204 205 #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); 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); 218 219 void refresh_cpu_vm_stats(int); 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 } 231 232 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 } 237 238 static inline void __inc_zone_page_state(struct page *page, 239 enum zone_stat_item item) 240 { 241 __inc_zone_state(page_zone(page), item); 242 } 243 244 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 } 249 250 static inline void __dec_zone_page_state(struct page *page, 251 enum zone_stat_item item) 252 { 253 __dec_zone_state(page_zone(page), item); 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) { } 265 #endif 266 267 #endif /* _LINUX_VMSTAT_H */ 268