[linux-2.6-block.git] / include / linux / vmstat.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_VMSTAT_H
#define _LINUX_VMSTAT_H

#include <linux/types.h>
#include <linux/percpu.h>
#include <linux/mmzone.h>
#include <linux/vm_event_item.h>
#include <linux/atomic.h>
#include <linux/static_key.h>

extern int sysctl_stat_interval;

#ifdef CONFIG_NUMA
#define ENABLE_NUMA_STAT   1
#define DISABLE_NUMA_STAT   0
extern int sysctl_vm_numa_stat;
DECLARE_STATIC_KEY_TRUE(vm_numa_stat_key);
extern int sysctl_vm_numa_stat_handler(struct ctl_table *table,
		int write, void __user *buffer, size_t *length, loff_t *ppos);
#endif

struct reclaim_stat {
	unsigned nr_dirty;
	unsigned nr_unqueued_dirty;
	unsigned nr_congested;
	unsigned nr_writeback;
	unsigned nr_immediate;
	unsigned nr_activate;
	unsigned nr_ref_keep;
	unsigned nr_unmap_fail;
};

#ifdef CONFIG_VM_EVENT_COUNTERS
/*
 * Light weight per cpu counter implementation.
 *
 * Counters should only be incremented and no critical kernel component
 * should rely on the counter values.
 *
 * Counters are handled completely inline. On many platforms the code
 * generated will simply be the increment of a global address.
 */

struct vm_event_state {
	unsigned long event[NR_VM_EVENT_ITEMS];
};

DECLARE_PER_CPU(struct vm_event_state, vm_event_states);

/*
 * vm counters are allowed to be racy. Use raw_cpu_ops to avoid the
 * local_irq_disable overhead.
 */
static inline void __count_vm_event(enum vm_event_item item)
{
	raw_cpu_inc(vm_event_states.event[item]);
}

static inline void count_vm_event(enum vm_event_item item)
{
	this_cpu_inc(vm_event_states.event[item]);
}

static inline void __count_vm_events(enum vm_event_item item, long delta)
{
	raw_cpu_add(vm_event_states.event[item], delta);
}

static inline void count_vm_events(enum vm_event_item item, long delta)
{
	this_cpu_add(vm_event_states.event[item], delta);
}

extern void all_vm_events(unsigned long *);

extern void vm_events_fold_cpu(int cpu);

#else

/* Disable counters */
static inline void count_vm_event(enum vm_event_item item)
{
}
static inline void count_vm_events(enum vm_event_item item, long delta)
{
}
static inline void __count_vm_event(enum vm_event_item item)
{
}
static inline void __count_vm_events(enum vm_event_item item, long delta)
{
}
static inline void all_vm_events(unsigned long *ret)
{
}
static inline void vm_events_fold_cpu(int cpu)
{
}

#endif /* CONFIG_VM_EVENT_COUNTERS */

#ifdef CONFIG_NUMA_BALANCING
#define count_vm_numa_event(x)     count_vm_event(x)
#define count_vm_numa_events(x, y) count_vm_events(x, y)
#else
#define count_vm_numa_event(x) do {} while (0)
#define count_vm_numa_events(x, y) do { (void)(y); } while (0)
#endif /* CONFIG_NUMA_BALANCING */

#ifdef CONFIG_DEBUG_TLBFLUSH
#define count_vm_tlb_event(x)	   count_vm_event(x)
#define count_vm_tlb_events(x, y)  count_vm_events(x, y)
#else
#define count_vm_tlb_event(x)     do {} while (0)
#define count_vm_tlb_events(x, y) do { (void)(y); } while (0)
#endif

#ifdef CONFIG_DEBUG_VM_VMACACHE
#define count_vm_vmacache_event(x) count_vm_event(x)
#else
#define count_vm_vmacache_event(x) do {} while (0)
#endif

#define __count_zid_vm_events(item, zid, delta) \
	__count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)

/*
 * Zone and node-based page accounting with per cpu differentials.
 */
extern atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS];
extern atomic_long_t vm_numa_stat[NR_VM_NUMA_STAT_ITEMS];
extern atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS];

#ifdef CONFIG_NUMA
static inline void zone_numa_state_add(long x, struct zone *zone,
				 enum numa_stat_item item)
{
	atomic_long_add(x, &zone->vm_numa_stat[item]);
	atomic_long_add(x, &vm_numa_stat[item]);
}

static inline unsigned long global_numa_state(enum numa_stat_item item)
{
	long x = atomic_long_read(&vm_numa_stat[item]);

	return x;
}

static inline unsigned long zone_numa_state_snapshot(struct zone *zone,
					enum numa_stat_item item)
{
	long x = atomic_long_read(&zone->vm_numa_stat[item]);
	int cpu;

	for_each_online_cpu(cpu)
		x += per_cpu_ptr(zone->pageset, cpu)->vm_numa_stat_diff[item];

	return x;
}
#endif /* CONFIG_NUMA */

static inline void zone_page_state_add(long x, struct zone *zone,
				 enum zone_stat_item item)
{
	atomic_long_add(x, &zone->vm_stat[item]);
	atomic_long_add(x, &vm_zone_stat[item]);
}

static inline void node_page_state_add(long x, struct pglist_data *pgdat,
				 enum node_stat_item item)
{
	atomic_long_add(x, &pgdat->vm_stat[item]);
	atomic_long_add(x, &vm_node_stat[item]);
}

static inline unsigned long global_zone_page_state(enum zone_stat_item item)
{
	long x = atomic_long_read(&vm_zone_stat[item]);
#ifdef CONFIG_SMP
	if (x < 0)
		x = 0;
#endif
	return x;
}

static inline unsigned long global_node_page_state(enum node_stat_item item)
{
	long x = atomic_long_read(&vm_node_stat[item]);
#ifdef CONFIG_SMP
	if (x < 0)
		x = 0;
#endif
	return x;
}

static inline unsigned long zone_page_state(struct zone *zone,
					enum zone_stat_item item)
{
	long x = atomic_long_read(&zone->vm_stat[item]);
#ifdef CONFIG_SMP
	if (x < 0)
		x = 0;
#endif
	return x;
}

/*
 * More accurate version that also considers the currently pending
 * deltas. For that we need to loop over all cpus to find the current
 * deltas. There is no synchronization so the result cannot be
 * exactly accurate either.
 */
static inline unsigned long zone_page_state_snapshot(struct zone *zone,
					enum zone_stat_item item)
{
	long x = atomic_long_read(&zone->vm_stat[item]);

#ifdef CONFIG_SMP
	int cpu;
	for_each_online_cpu(cpu)
		x += per_cpu_ptr(zone->pageset, cpu)->vm_stat_diff[item];

	if (x < 0)
		x = 0;
#endif
	return x;
}

#ifdef CONFIG_NUMA
extern void __inc_numa_state(struct zone *zone, enum numa_stat_item item);
extern unsigned long sum_zone_node_page_state(int node,
					      enum zone_stat_item item);
extern unsigned long sum_zone_numa_state(int node, enum numa_stat_item item);
extern unsigned long node_page_state(struct pglist_data *pgdat,
						enum node_stat_item item);
#else
#define sum_zone_node_page_state(node, item) global_zone_page_state(item)
#define node_page_state(node, item) global_node_page_state(item)
#endif /* CONFIG_NUMA */

#define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
#define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
#define add_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, __d)
#define sub_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, -(__d))

#ifdef CONFIG_SMP
void __mod_zone_page_state(struct zone *, enum zone_stat_item item, long);
void __inc_zone_page_state(struct page *, enum zone_stat_item);
void __dec_zone_page_state(struct page *, enum zone_stat_item);

void __mod_node_page_state(struct pglist_data *, enum node_stat_item item, long);
void __inc_node_page_state(struct page *, enum node_stat_item);
void __dec_node_page_state(struct page *, enum node_stat_item);

void mod_zone_page_state(struct zone *, enum zone_stat_item, long);
void inc_zone_page_state(struct page *, enum zone_stat_item);
void dec_zone_page_state(struct page *, enum zone_stat_item);

void mod_node_page_state(struct pglist_data *, enum node_stat_item, long);
void inc_node_page_state(struct page *, enum node_stat_item);
void dec_node_page_state(struct page *, enum node_stat_item);

extern void inc_node_state(struct pglist_data *, enum node_stat_item);
extern void __inc_zone_state(struct zone *, enum zone_stat_item);
extern void __inc_node_state(struct pglist_data *, enum node_stat_item);
extern void dec_zone_state(struct zone *, enum zone_stat_item);
extern void __dec_zone_state(struct zone *, enum zone_stat_item);
extern void __dec_node_state(struct pglist_data *, enum node_stat_item);

void quiet_vmstat(void);
void cpu_vm_stats_fold(int cpu);
void refresh_zone_stat_thresholds(void);

struct ctl_table;
int vmstat_refresh(struct ctl_table *, int write,
		   void __user *buffer, size_t *lenp, loff_t *ppos);

void drain_zonestat(struct zone *zone, struct per_cpu_pageset *);

int calculate_pressure_threshold(struct zone *zone);
int calculate_normal_threshold(struct zone *zone);
void set_pgdat_percpu_threshold(pg_data_t *pgdat,
				int (*calculate_pressure)(struct zone *));
#else /* CONFIG_SMP */

/*
 * We do not maintain differentials in a single processor configuration.
 * The functions directly modify the zone and global counters.
 */
static inline void __mod_zone_page_state(struct zone *zone,
			enum zone_stat_item item, long delta)
{
	zone_page_state_add(delta, zone, item);
}

static inline void __mod_node_page_state(struct pglist_data *pgdat,
			enum node_stat_item item, int delta)
{
	node_page_state_add(delta, pgdat, item);
}

static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
{
	atomic_long_inc(&zone->vm_stat[item]);
	atomic_long_inc(&vm_zone_stat[item]);
}

static inline void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
{
	atomic_long_inc(&pgdat->vm_stat[item]);
	atomic_long_inc(&vm_node_stat[item]);
}

static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
{
	atomic_long_dec(&zone->vm_stat[item]);
	atomic_long_dec(&vm_zone_stat[item]);
}

static inline void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
{
	atomic_long_dec(&pgdat->vm_stat[item]);
	atomic_long_dec(&vm_node_stat[item]);
}

static inline void __inc_zone_page_state(struct page *page,
			enum zone_stat_item item)
{
	__inc_zone_state(page_zone(page), item);
}

static inline void __inc_node_page_state(struct page *page,
			enum node_stat_item item)
{
	__inc_node_state(page_pgdat(page), item);
}


static inline void __dec_zone_page_state(struct page *page,
			enum zone_stat_item item)
{
	__dec_zone_state(page_zone(page), item);
}

static inline void __dec_node_page_state(struct page *page,
			enum node_stat_item item)
{
	__dec_node_state(page_pgdat(page), item);
}


/*
 * We only use atomic operations to update counters. So there is no need to
 * disable interrupts.
 */
#define inc_zone_page_state __inc_zone_page_state
#define dec_zone_page_state __dec_zone_page_state
#define mod_zone_page_state __mod_zone_page_state

#define inc_node_page_state __inc_node_page_state
#define dec_node_page_state __dec_node_page_state
#define mod_node_page_state __mod_node_page_state

#define inc_zone_state __inc_zone_state
#define inc_node_state __inc_node_state
#define dec_zone_state __dec_zone_state

#define set_pgdat_percpu_threshold(pgdat, callback) { }

static inline void refresh_zone_stat_thresholds(void) { }
static inline void cpu_vm_stats_fold(int cpu) { }
static inline void quiet_vmstat(void) { }

static inline void drain_zonestat(struct zone *zone,
			struct per_cpu_pageset *pset) { }
#endif		/* CONFIG_SMP */

static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages,
					     int migratetype)
{
	__mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages);
	if (is_migrate_cma(migratetype))
		__mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages);
}

extern const char * const vmstat_text[];

#endif /* _LINUX_VMSTAT_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
f6ac2354 CL	2	#ifndef _LINUX_VMSTAT_H
	3	#define _LINUX_VMSTAT_H
	4
	5	#include <linux/types.h>
	6	#include <linux/percpu.h>
2244b95a	7	#include <linux/mmzone.h>
f042e707	8	#include <linux/vm_event_item.h>
60063497	9	#include <linux/atomic.h>
4518085e	10	#include <linux/static_key.h>
f6ac2354	11
c748e134 AB	12	extern int sysctl_stat_interval;
c748e134 AB	13
4518085e KW	14	#ifdef CONFIG_NUMA
	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);
	21	#endif
	22
d51d1e64 SR	23	struct reclaim_stat {
	24	unsigned nr_dirty;
	25	unsigned nr_unqueued_dirty;
	26	unsigned nr_congested;
	27	unsigned nr_writeback;
	28	unsigned nr_immediate;
	29	unsigned nr_activate;
	30	unsigned nr_ref_keep;
	31	unsigned nr_unmap_fail;
	32	};
	33
780a0656 AM	34	#ifdef CONFIG_VM_EVENT_COUNTERS
	35	/*
	36	* Light weight per cpu counter implementation.
	37	*
	38	* Counters should only be incremented and no critical kernel component
	39	* should rely on the counter values.
	40	*
	41	* Counters are handled completely inline. On many platforms the code
	42	* generated will simply be the increment of a global address.
	43	*/
	44
f8891e5e CL	45	struct vm_event_state {
f8891e5e CL	46	unsigned long event[NR_VM_EVENT_ITEMS];
f6ac2354 CL	47	};
f6ac2354 CL	48
f8891e5e CL	49	DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
f8891e5e CL	50
293b6a4c CL	51	/*
	52	* vm counters are allowed to be racy. Use raw_cpu_ops to avoid the
	53	* local_irq_disable overhead.
	54	*/
f8891e5e CL	55	static inline void __count_vm_event(enum vm_event_item item)
f8891e5e CL	56	{
293b6a4c	57	raw_cpu_inc(vm_event_states.event[item]);
f8891e5e CL	58	}
	59
	60	static inline void count_vm_event(enum vm_event_item item)
	61	{
dd17c8f7	62	this_cpu_inc(vm_event_states.event[item]);
f8891e5e CL	63	}
	64
	65	static inline void __count_vm_events(enum vm_event_item item, long delta)
	66	{
293b6a4c	67	raw_cpu_add(vm_event_states.event[item], delta);
f8891e5e CL	68	}
	69
	70	static inline void count_vm_events(enum vm_event_item item, long delta)
	71	{
dd17c8f7	72	this_cpu_add(vm_event_states.event[item], delta);
f8891e5e CL	73	}
	74
	75	extern void all_vm_events(unsigned long *);
f1cb0879	76
f8891e5e CL	77	extern void vm_events_fold_cpu(int cpu);
	78
	79	#else
	80
	81	/* Disable counters */
780a0656 AM	82	static inline void count_vm_event(enum vm_event_item item)
	83	{
	84	}
	85	static inline void count_vm_events(enum vm_event_item item, long delta)
	86	{
	87	}
	88	static inline void __count_vm_event(enum vm_event_item item)
	89	{
	90	}
	91	static inline void __count_vm_events(enum vm_event_item item, long delta)
	92	{
	93	}
	94	static inline void all_vm_events(unsigned long *ret)
	95	{
	96	}
	97	static inline void vm_events_fold_cpu(int cpu)
	98	{
	99	}
f8891e5e CL	100
	101	#endif /* CONFIG_VM_EVENT_COUNTERS */
	102
03c5a6e1 MG	103	#ifdef CONFIG_NUMA_BALANCING
	104	#define count_vm_numa_event(x) count_vm_event(x)
	105	#define count_vm_numa_events(x, y) count_vm_events(x, y)
	106	#else
	107	#define count_vm_numa_event(x) do {} while (0)
3c0ff468	108	#define count_vm_numa_events(x, y) do { (void)(y); } while (0)
03c5a6e1 MG	109	#endif /* CONFIG_NUMA_BALANCING */
03c5a6e1 MG	110
ec659934 MG	111	#ifdef CONFIG_DEBUG_TLBFLUSH
	112	#define count_vm_tlb_event(x) count_vm_event(x)
	113	#define count_vm_tlb_events(x, y) count_vm_events(x, y)
	114	#else
	115	#define count_vm_tlb_event(x) do {} while (0)
	116	#define count_vm_tlb_events(x, y) do { (void)(y); } while (0)
	117	#endif
	118
4f115147 DB	119	#ifdef CONFIG_DEBUG_VM_VMACACHE
	120	#define count_vm_vmacache_event(x) count_vm_event(x)
	121	#else
	122	#define count_vm_vmacache_event(x) do {} while (0)
	123	#endif
	124
16709d1d MG	125	#define __count_zid_vm_events(item, zid, delta) \
16709d1d MG	126	__count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
f6ac2354	127
2244b95a	128	/*
75ef7184	129	* Zone and node-based page accounting with per cpu differentials.
2244b95a	130	*/
75ef7184	131	extern atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS];
3a321d2a	132	extern atomic_long_t vm_numa_stat[NR_VM_NUMA_STAT_ITEMS];
75ef7184	133	extern atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS];
2244b95a	134
3a321d2a KW	135	#ifdef CONFIG_NUMA
	136	static inline void zone_numa_state_add(long x, struct zone *zone,
	137	enum numa_stat_item item)
	138	{
	139	atomic_long_add(x, &zone->vm_numa_stat[item]);
	140	atomic_long_add(x, &vm_numa_stat[item]);
	141	}
	142
	143	static inline unsigned long global_numa_state(enum numa_stat_item item)
	144	{
	145	long x = atomic_long_read(&vm_numa_stat[item]);
	146
	147	return x;
	148	}
	149
63803222	150	static inline unsigned long zone_numa_state_snapshot(struct zone *zone,
3a321d2a KW	151	enum numa_stat_item item)
	152	{
	153	long x = atomic_long_read(&zone->vm_numa_stat[item]);
63803222 KW	154	int cpu;
	155
	156	for_each_online_cpu(cpu)
	157	x += per_cpu_ptr(zone->pageset, cpu)->vm_numa_stat_diff[item];
3a321d2a KW	158
	159	return x;
	160	}
	161	#endif /* CONFIG_NUMA */
	162
2244b95a CL	163	static inline void zone_page_state_add(long x, struct zone *zone,
	164	enum zone_stat_item item)
	165	{
	166	atomic_long_add(x, &zone->vm_stat[item]);
75ef7184 MG	167	atomic_long_add(x, &vm_zone_stat[item]);
	168	}
	169
	170	static inline void node_page_state_add(long x, struct pglist_data *pgdat,
	171	enum node_stat_item item)
	172	{
	173	atomic_long_add(x, &pgdat->vm_stat[item]);
	174	atomic_long_add(x, &vm_node_stat[item]);
2244b95a CL	175	}
2244b95a CL	176
c41f012a	177	static inline unsigned long global_zone_page_state(enum zone_stat_item item)
2244b95a	178	{
75ef7184 MG	179	long x = atomic_long_read(&vm_zone_stat[item]);
	180	#ifdef CONFIG_SMP
	181	if (x < 0)
	182	x = 0;
	183	#endif
	184	return x;
	185	}
	186
	187	static inline unsigned long global_node_page_state(enum node_stat_item item)
	188	{
	189	long x = atomic_long_read(&vm_node_stat[item]);
2244b95a CL	190	#ifdef CONFIG_SMP
	191	if (x < 0)
	192	x = 0;
	193	#endif
	194	return x;
	195	}
	196
	197	static inline unsigned long zone_page_state(struct zone *zone,
	198	enum zone_stat_item item)
	199	{
	200	long x = atomic_long_read(&zone->vm_stat[item]);
	201	#ifdef CONFIG_SMP
	202	if (x < 0)
	203	x = 0;
	204	#endif
	205	return x;
	206	}
	207
aa454840 CL	208	/*
	209	* More accurate version that also considers the currently pending
	210	* deltas. For that we need to loop over all cpus to find the current
	211	* deltas. There is no synchronization so the result cannot be
	212	* exactly accurate either.
	213	*/
	214	static inline unsigned long zone_page_state_snapshot(struct zone *zone,
	215	enum zone_stat_item item)
	216	{
	217	long x = atomic_long_read(&zone->vm_stat[item]);
	218
	219	#ifdef CONFIG_SMP
	220	int cpu;
	221	for_each_online_cpu(cpu)
	222	x += per_cpu_ptr(zone->pageset, cpu)->vm_stat_diff[item];
	223
	224	if (x < 0)
	225	x = 0;
	226	#endif
	227	return x;
	228	}
	229
2244b95a	230	#ifdef CONFIG_NUMA
3a321d2a	231	extern void __inc_numa_state(struct zone *zone, enum numa_stat_item item);
75ef7184	232	extern unsigned long sum_zone_node_page_state(int node,
3a321d2a KW	233	enum zone_stat_item item);
3a321d2a KW	234	extern unsigned long sum_zone_numa_state(int node, enum numa_stat_item item);
75ef7184 MG	235	extern unsigned long node_page_state(struct pglist_data *pgdat,
75ef7184 MG	236	enum node_stat_item item);
2244b95a	237	#else
c41f012a	238	#define sum_zone_node_page_state(node, item) global_zone_page_state(item)
75ef7184	239	#define node_page_state(node, item) global_node_page_state(item)
ca889e6c	240	#endif /* CONFIG_NUMA */
2244b95a	241
2244b95a CL	242	#define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
2244b95a CL	243	#define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
75ef7184 MG	244	#define add_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, __d)
75ef7184 MG	245	#define sub_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, -(__d))
2244b95a	246
2244b95a	247	#ifdef CONFIG_SMP
6cdb18ad	248	void __mod_zone_page_state(struct zone *, enum zone_stat_item item, long);
2244b95a CL	249	void __inc_zone_page_state(struct page *, enum zone_stat_item);
2244b95a CL	250	void __dec_zone_page_state(struct page *, enum zone_stat_item);
f6ac2354	251
75ef7184 MG	252	void __mod_node_page_state(struct pglist_data *, enum node_stat_item item, long);
	253	void __inc_node_page_state(struct page *, enum node_stat_item);
	254	void __dec_node_page_state(struct page *, enum node_stat_item);
	255
6cdb18ad	256	void mod_zone_page_state(struct zone *, enum zone_stat_item, long);
2244b95a CL	257	void inc_zone_page_state(struct page *, enum zone_stat_item);
	258	void dec_zone_page_state(struct page *, enum zone_stat_item);
	259
75ef7184 MG	260	void mod_node_page_state(struct pglist_data *, enum node_stat_item, long);
	261	void inc_node_page_state(struct page *, enum node_stat_item);
	262	void dec_node_page_state(struct page *, enum node_stat_item);
	263
75ef7184	264	extern void inc_node_state(struct pglist_data *, enum node_stat_item);
c8785385	265	extern void __inc_zone_state(struct zone *, enum zone_stat_item);
75ef7184	266	extern void __inc_node_state(struct pglist_data *, enum node_stat_item);
c8785385 CL	267	extern void dec_zone_state(struct zone *, enum zone_stat_item);
c8785385 CL	268	extern void __dec_zone_state(struct zone *, enum zone_stat_item);
75ef7184	269	extern void __dec_node_state(struct pglist_data *, enum node_stat_item);
2244b95a	270
0eb77e98	271	void quiet_vmstat(void);
2bb921e5	272	void cpu_vm_stats_fold(int cpu);
a6cccdc3	273	void refresh_zone_stat_thresholds(void);
b44129b3	274
52b6f46b HD	275	struct ctl_table;
	276	int vmstat_refresh(struct ctl_table *, int write,
	277	void __user buffer, size_t lenp, loff_t *ppos);
	278
5a883813 MK	279	void drain_zonestat(struct zone zone, struct per_cpu_pageset );
5a883813 MK	280
b44129b3 MG	281	int calculate_pressure_threshold(struct zone *zone);
	282	int calculate_normal_threshold(struct zone *zone);
	283	void set_pgdat_percpu_threshold(pg_data_t *pgdat,
	284	int (calculate_pressure)(struct zone ));
2244b95a CL	285	#else /* CONFIG_SMP */
	286
	287	/*
	288	* We do not maintain differentials in a single processor configuration.
	289	* The functions directly modify the zone and global counters.
	290	*/
	291	static inline void __mod_zone_page_state(struct zone *zone,
6cdb18ad	292	enum zone_stat_item item, long delta)
2244b95a CL	293	{
	294	zone_page_state_add(delta, zone, item);
	295	}
	296
75ef7184 MG	297	static inline void __mod_node_page_state(struct pglist_data *pgdat,
	298	enum node_stat_item item, int delta)
	299	{
	300	node_page_state_add(delta, pgdat, item);
	301	}
	302
7f4599e9 CL	303	static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
	304	{
	305	atomic_long_inc(&zone->vm_stat[item]);
75ef7184 MG	306	atomic_long_inc(&vm_zone_stat[item]);
	307	}
	308
	309	static inline void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
	310	{
	311	atomic_long_inc(&pgdat->vm_stat[item]);
	312	atomic_long_inc(&vm_node_stat[item]);
7f4599e9 CL	313	}
7f4599e9 CL	314
c8785385 CL	315	static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
	316	{
	317	atomic_long_dec(&zone->vm_stat[item]);
75ef7184 MG	318	atomic_long_dec(&vm_zone_stat[item]);
	319	}
	320
	321	static inline void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
	322	{
	323	atomic_long_dec(&pgdat->vm_stat[item]);
	324	atomic_long_dec(&vm_node_stat[item]);
c8785385 CL	325	}
c8785385 CL	326
6a3ed212 JW	327	static inline void __inc_zone_page_state(struct page *page,
	328	enum zone_stat_item item)
	329	{
	330	__inc_zone_state(page_zone(page), item);
	331	}
	332
75ef7184 MG	333	static inline void __inc_node_page_state(struct page *page,
	334	enum node_stat_item item)
	335	{
	336	__inc_node_state(page_pgdat(page), item);
	337	}
	338
	339
2244b95a CL	340	static inline void __dec_zone_page_state(struct page *page,
	341	enum zone_stat_item item)
	342	{
57ce36fe	343	__dec_zone_state(page_zone(page), item);
2244b95a CL	344	}
2244b95a CL	345
75ef7184 MG	346	static inline void __dec_node_page_state(struct page *page,
	347	enum node_stat_item item)
	348	{
	349	__dec_node_state(page_pgdat(page), item);
	350	}
	351
	352
2244b95a CL	353	/*
	354	* We only use atomic operations to update counters. So there is no need to
	355	* disable interrupts.
	356	*/
	357	#define inc_zone_page_state __inc_zone_page_state
	358	#define dec_zone_page_state __dec_zone_page_state
	359	#define mod_zone_page_state __mod_zone_page_state
	360
75ef7184 MG	361	#define inc_node_page_state __inc_node_page_state
	362	#define dec_node_page_state __dec_node_page_state
	363	#define mod_node_page_state __mod_node_page_state
	364
6a3ed212	365	#define inc_zone_state __inc_zone_state
75ef7184	366	#define inc_node_state __inc_node_state
6a3ed212 JW	367	#define dec_zone_state __dec_zone_state
6a3ed212 JW	368
b44129b3	369	#define set_pgdat_percpu_threshold(pgdat, callback) { }
88f5acf8	370
a6cccdc3	371	static inline void refresh_zone_stat_thresholds(void) { }
2bb921e5	372	static inline void cpu_vm_stats_fold(int cpu) { }
0eb77e98	373	static inline void quiet_vmstat(void) { }
a6cccdc3	374
5a883813 MK	375	static inline void drain_zonestat(struct zone *zone,
5a883813 MK	376	struct per_cpu_pageset *pset) { }
fa25c503 KM	377	#endif /* CONFIG_SMP */
fa25c503 KM	378
d1ce749a BZ	379	static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages,
	380	int migratetype)
	381	{
	382	__mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages);
	383	if (is_migrate_cma(migratetype))
	384	__mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages);
	385	}
	386
fa25c503	387	extern const char * const vmstat_text[];
2244b95a CL	388
2244b95a CL	389	#endif /* _LINUX_VMSTAT_H */