1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_VMSTAT_H
3 #define _LINUX_VMSTAT_H
5 #include <linux/types.h>
6 #include <linux/percpu.h>
7 #include <linux/mmzone.h>
8 #include <linux/vm_event_item.h>
9 #include <linux/atomic.h>
10 #include <linux/static_key.h>
12 extern int sysctl_stat_interval
;
15 #define ENABLE_NUMA_STAT 1
16 #define DISABLE_NUMA_STAT 0
17 extern int sysctl_vm_numa_stat
;
18 DECLARE_STATIC_KEY_TRUE(vm_numa_stat_key
);
19 extern int sysctl_vm_numa_stat_handler(struct ctl_table
*table
,
20 int write
, void __user
*buffer
, size_t *length
, loff_t
*ppos
);
23 #ifdef CONFIG_VM_EVENT_COUNTERS
25 * Light weight per cpu counter implementation.
27 * Counters should only be incremented and no critical kernel component
28 * should rely on the counter values.
30 * Counters are handled completely inline. On many platforms the code
31 * generated will simply be the increment of a global address.
34 struct vm_event_state
{
35 unsigned long event
[NR_VM_EVENT_ITEMS
];
38 DECLARE_PER_CPU(struct vm_event_state
, vm_event_states
);
41 * vm counters are allowed to be racy. Use raw_cpu_ops to avoid the
42 * local_irq_disable overhead.
44 static inline void __count_vm_event(enum vm_event_item item
)
46 raw_cpu_inc(vm_event_states
.event
[item
]);
49 static inline void count_vm_event(enum vm_event_item item
)
51 this_cpu_inc(vm_event_states
.event
[item
]);
54 static inline void __count_vm_events(enum vm_event_item item
, long delta
)
56 raw_cpu_add(vm_event_states
.event
[item
], delta
);
59 static inline void count_vm_events(enum vm_event_item item
, long delta
)
61 this_cpu_add(vm_event_states
.event
[item
], delta
);
64 extern void all_vm_events(unsigned long *);
66 extern void vm_events_fold_cpu(int cpu
);
70 /* Disable counters */
71 static inline void count_vm_event(enum vm_event_item item
)
74 static inline void count_vm_events(enum vm_event_item item
, long delta
)
77 static inline void __count_vm_event(enum vm_event_item item
)
80 static inline void __count_vm_events(enum vm_event_item item
, long delta
)
83 static inline void all_vm_events(unsigned long *ret
)
86 static inline void vm_events_fold_cpu(int cpu
)
90 #endif /* CONFIG_VM_EVENT_COUNTERS */
92 #ifdef CONFIG_NUMA_BALANCING
93 #define count_vm_numa_event(x) count_vm_event(x)
94 #define count_vm_numa_events(x, y) count_vm_events(x, y)
96 #define count_vm_numa_event(x) do {} while (0)
97 #define count_vm_numa_events(x, y) do { (void)(y); } while (0)
98 #endif /* CONFIG_NUMA_BALANCING */
100 #ifdef CONFIG_DEBUG_TLBFLUSH
101 #define count_vm_tlb_event(x) count_vm_event(x)
102 #define count_vm_tlb_events(x, y) count_vm_events(x, y)
104 #define count_vm_tlb_event(x) do {} while (0)
105 #define count_vm_tlb_events(x, y) do { (void)(y); } while (0)
108 #ifdef CONFIG_DEBUG_VM_VMACACHE
109 #define count_vm_vmacache_event(x) count_vm_event(x)
111 #define count_vm_vmacache_event(x) do {} while (0)
114 #define __count_zid_vm_events(item, zid, delta) \
115 __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
118 * Zone and node-based page accounting with per cpu differentials.
120 extern atomic_long_t vm_zone_stat
[NR_VM_ZONE_STAT_ITEMS
];
121 extern atomic_long_t vm_numa_stat
[NR_VM_NUMA_STAT_ITEMS
];
122 extern atomic_long_t vm_node_stat
[NR_VM_NODE_STAT_ITEMS
];
125 static inline void zone_numa_state_add(long x
, struct zone
*zone
,
126 enum numa_stat_item item
)
128 atomic_long_add(x
, &zone
->vm_numa_stat
[item
]);
129 atomic_long_add(x
, &vm_numa_stat
[item
]);
132 static inline unsigned long global_numa_state(enum numa_stat_item item
)
134 long x
= atomic_long_read(&vm_numa_stat
[item
]);
139 static inline unsigned long zone_numa_state_snapshot(struct zone
*zone
,
140 enum numa_stat_item item
)
142 long x
= atomic_long_read(&zone
->vm_numa_stat
[item
]);
145 for_each_online_cpu(cpu
)
146 x
+= per_cpu_ptr(zone
->pageset
, cpu
)->vm_numa_stat_diff
[item
];
150 #endif /* CONFIG_NUMA */
152 static inline void zone_page_state_add(long x
, struct zone
*zone
,
153 enum zone_stat_item item
)
155 atomic_long_add(x
, &zone
->vm_stat
[item
]);
156 atomic_long_add(x
, &vm_zone_stat
[item
]);
159 static inline void node_page_state_add(long x
, struct pglist_data
*pgdat
,
160 enum node_stat_item item
)
162 atomic_long_add(x
, &pgdat
->vm_stat
[item
]);
163 atomic_long_add(x
, &vm_node_stat
[item
]);
166 static inline unsigned long global_zone_page_state(enum zone_stat_item item
)
168 long x
= atomic_long_read(&vm_zone_stat
[item
]);
176 static inline unsigned long global_node_page_state(enum node_stat_item item
)
178 long x
= atomic_long_read(&vm_node_stat
[item
]);
186 static inline unsigned long zone_page_state(struct zone
*zone
,
187 enum zone_stat_item item
)
189 long x
= atomic_long_read(&zone
->vm_stat
[item
]);
198 * More accurate version that also considers the currently pending
199 * deltas. For that we need to loop over all cpus to find the current
200 * deltas. There is no synchronization so the result cannot be
201 * exactly accurate either.
203 static inline unsigned long zone_page_state_snapshot(struct zone
*zone
,
204 enum zone_stat_item item
)
206 long x
= atomic_long_read(&zone
->vm_stat
[item
]);
210 for_each_online_cpu(cpu
)
211 x
+= per_cpu_ptr(zone
->pageset
, cpu
)->vm_stat_diff
[item
];
219 static inline unsigned long node_page_state_snapshot(pg_data_t
*pgdat
,
220 enum node_stat_item item
)
222 long x
= atomic_long_read(&pgdat
->vm_stat
[item
]);
226 for_each_online_cpu(cpu
)
227 x
+= per_cpu_ptr(pgdat
->per_cpu_nodestats
, cpu
)->vm_node_stat_diff
[item
];
237 extern void __inc_numa_state(struct zone
*zone
, enum numa_stat_item item
);
238 extern unsigned long sum_zone_node_page_state(int node
,
239 enum zone_stat_item item
);
240 extern unsigned long sum_zone_numa_state(int node
, enum numa_stat_item item
);
241 extern unsigned long node_page_state(struct pglist_data
*pgdat
,
242 enum node_stat_item item
);
244 #define sum_zone_node_page_state(node, item) global_zone_page_state(item)
245 #define node_page_state(node, item) global_node_page_state(item)
246 #endif /* CONFIG_NUMA */
248 #define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
249 #define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
250 #define add_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, __d)
251 #define sub_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, -(__d))
254 void __mod_zone_page_state(struct zone
*, enum zone_stat_item item
, long);
255 void __inc_zone_page_state(struct page
*, enum zone_stat_item
);
256 void __dec_zone_page_state(struct page
*, enum zone_stat_item
);
258 void __mod_node_page_state(struct pglist_data
*, enum node_stat_item item
, long);
259 void __inc_node_page_state(struct page
*, enum node_stat_item
);
260 void __dec_node_page_state(struct page
*, enum node_stat_item
);
262 void mod_zone_page_state(struct zone
*, enum zone_stat_item
, long);
263 void inc_zone_page_state(struct page
*, enum zone_stat_item
);
264 void dec_zone_page_state(struct page
*, enum zone_stat_item
);
266 void mod_node_page_state(struct pglist_data
*, enum node_stat_item
, long);
267 void inc_node_page_state(struct page
*, enum node_stat_item
);
268 void dec_node_page_state(struct page
*, enum node_stat_item
);
270 extern void inc_node_state(struct pglist_data
*, enum node_stat_item
);
271 extern void __inc_zone_state(struct zone
*, enum zone_stat_item
);
272 extern void __inc_node_state(struct pglist_data
*, enum node_stat_item
);
273 extern void dec_zone_state(struct zone
*, enum zone_stat_item
);
274 extern void __dec_zone_state(struct zone
*, enum zone_stat_item
);
275 extern void __dec_node_state(struct pglist_data
*, enum node_stat_item
);
277 void quiet_vmstat(void);
278 void cpu_vm_stats_fold(int cpu
);
279 void refresh_zone_stat_thresholds(void);
282 int vmstat_refresh(struct ctl_table
*, int write
,
283 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
285 void drain_zonestat(struct zone
*zone
, struct per_cpu_pageset
*);
287 int calculate_pressure_threshold(struct zone
*zone
);
288 int calculate_normal_threshold(struct zone
*zone
);
289 void set_pgdat_percpu_threshold(pg_data_t
*pgdat
,
290 int (*calculate_pressure
)(struct zone
*));
291 #else /* CONFIG_SMP */
294 * We do not maintain differentials in a single processor configuration.
295 * The functions directly modify the zone and global counters.
297 static inline void __mod_zone_page_state(struct zone
*zone
,
298 enum zone_stat_item item
, long delta
)
300 zone_page_state_add(delta
, zone
, item
);
303 static inline void __mod_node_page_state(struct pglist_data
*pgdat
,
304 enum node_stat_item item
, int delta
)
306 node_page_state_add(delta
, pgdat
, item
);
309 static inline void __inc_zone_state(struct zone
*zone
, enum zone_stat_item item
)
311 atomic_long_inc(&zone
->vm_stat
[item
]);
312 atomic_long_inc(&vm_zone_stat
[item
]);
315 static inline void __inc_node_state(struct pglist_data
*pgdat
, enum node_stat_item item
)
317 atomic_long_inc(&pgdat
->vm_stat
[item
]);
318 atomic_long_inc(&vm_node_stat
[item
]);
321 static inline void __dec_zone_state(struct zone
*zone
, enum zone_stat_item item
)
323 atomic_long_dec(&zone
->vm_stat
[item
]);
324 atomic_long_dec(&vm_zone_stat
[item
]);
327 static inline void __dec_node_state(struct pglist_data
*pgdat
, enum node_stat_item item
)
329 atomic_long_dec(&pgdat
->vm_stat
[item
]);
330 atomic_long_dec(&vm_node_stat
[item
]);
333 static inline void __inc_zone_page_state(struct page
*page
,
334 enum zone_stat_item item
)
336 __inc_zone_state(page_zone(page
), item
);
339 static inline void __inc_node_page_state(struct page
*page
,
340 enum node_stat_item item
)
342 __inc_node_state(page_pgdat(page
), item
);
346 static inline void __dec_zone_page_state(struct page
*page
,
347 enum zone_stat_item item
)
349 __dec_zone_state(page_zone(page
), item
);
352 static inline void __dec_node_page_state(struct page
*page
,
353 enum node_stat_item item
)
355 __dec_node_state(page_pgdat(page
), item
);
360 * We only use atomic operations to update counters. So there is no need to
361 * disable interrupts.
363 #define inc_zone_page_state __inc_zone_page_state
364 #define dec_zone_page_state __dec_zone_page_state
365 #define mod_zone_page_state __mod_zone_page_state
367 #define inc_node_page_state __inc_node_page_state
368 #define dec_node_page_state __dec_node_page_state
369 #define mod_node_page_state __mod_node_page_state
371 #define inc_zone_state __inc_zone_state
372 #define inc_node_state __inc_node_state
373 #define dec_zone_state __dec_zone_state
375 #define set_pgdat_percpu_threshold(pgdat, callback) { }
377 static inline void refresh_zone_stat_thresholds(void) { }
378 static inline void cpu_vm_stats_fold(int cpu
) { }
379 static inline void quiet_vmstat(void) { }
381 static inline void drain_zonestat(struct zone
*zone
,
382 struct per_cpu_pageset
*pset
) { }
383 #endif /* CONFIG_SMP */
385 static inline void __mod_zone_freepage_state(struct zone
*zone
, int nr_pages
,
388 __mod_zone_page_state(zone
, NR_FREE_PAGES
, nr_pages
);
389 if (is_migrate_cma(migratetype
))
390 __mod_zone_page_state(zone
, NR_FREE_CMA_PAGES
, nr_pages
);
393 extern const char * const vmstat_text
[];
395 #endif /* _LINUX_VMSTAT_H */