[mirror_ubuntu-bionic-kernel.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>

extern int sysctl_stat_interval;

#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;
}

static inline unsigned long node_page_state_snapshot(pg_data_t *pgdat,
					enum node_stat_item item)
{
	long x = atomic_long_read(&pgdat->vm_stat[item]);

#ifdef CONFIG_SMP
	int cpu;
	for_each_online_cpu(cpu)
		x += per_cpu_ptr(pgdat->per_cpu_nodestats, cpu)->vm_node_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>
f6ac2354	10
c748e134 AB	11	extern int sysctl_stat_interval;
c748e134 AB	12
780a0656 AM	13	#ifdef CONFIG_VM_EVENT_COUNTERS
	14	/*
	15	* Light weight per cpu counter implementation.
	16	*
	17	* Counters should only be incremented and no critical kernel component
	18	* should rely on the counter values.
	19	*
	20	* Counters are handled completely inline. On many platforms the code
	21	* generated will simply be the increment of a global address.
	22	*/
	23
f8891e5e CL	24	struct vm_event_state {
f8891e5e CL	25	unsigned long event[NR_VM_EVENT_ITEMS];
f6ac2354 CL	26	};
f6ac2354 CL	27
f8891e5e CL	28	DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
f8891e5e CL	29
293b6a4c CL	30	/*
	31	* vm counters are allowed to be racy. Use raw_cpu_ops to avoid the
	32	* local_irq_disable overhead.
	33	*/
f8891e5e CL	34	static inline void __count_vm_event(enum vm_event_item item)
f8891e5e CL	35	{
293b6a4c	36	raw_cpu_inc(vm_event_states.event[item]);
f8891e5e CL	37	}
	38
	39	static inline void count_vm_event(enum vm_event_item item)
	40	{
dd17c8f7	41	this_cpu_inc(vm_event_states.event[item]);
f8891e5e CL	42	}
	43
	44	static inline void __count_vm_events(enum vm_event_item item, long delta)
	45	{
293b6a4c	46	raw_cpu_add(vm_event_states.event[item], delta);
f8891e5e CL	47	}
	48
	49	static inline void count_vm_events(enum vm_event_item item, long delta)
	50	{
dd17c8f7	51	this_cpu_add(vm_event_states.event[item], delta);
f8891e5e CL	52	}
	53
	54	extern void all_vm_events(unsigned long *);
f1cb0879	55
f8891e5e CL	56	extern void vm_events_fold_cpu(int cpu);
	57
	58	#else
	59
	60	/* Disable counters */
780a0656 AM	61	static inline void count_vm_event(enum vm_event_item item)
	62	{
	63	}
	64	static inline void count_vm_events(enum vm_event_item item, long delta)
	65	{
	66	}
	67	static inline void __count_vm_event(enum vm_event_item item)
	68	{
	69	}
	70	static inline void __count_vm_events(enum vm_event_item item, long delta)
	71	{
	72	}
	73	static inline void all_vm_events(unsigned long *ret)
	74	{
	75	}
	76	static inline void vm_events_fold_cpu(int cpu)
	77	{
	78	}
f8891e5e CL	79
	80	#endif /* CONFIG_VM_EVENT_COUNTERS */
	81
03c5a6e1 MG	82	#ifdef CONFIG_NUMA_BALANCING
	83	#define count_vm_numa_event(x) count_vm_event(x)
	84	#define count_vm_numa_events(x, y) count_vm_events(x, y)
	85	#else
	86	#define count_vm_numa_event(x) do {} while (0)
3c0ff468	87	#define count_vm_numa_events(x, y) do { (void)(y); } while (0)
03c5a6e1 MG	88	#endif /* CONFIG_NUMA_BALANCING */
03c5a6e1 MG	89
ec659934 MG	90	#ifdef CONFIG_DEBUG_TLBFLUSH
	91	#define count_vm_tlb_event(x) count_vm_event(x)
	92	#define count_vm_tlb_events(x, y) count_vm_events(x, y)
	93	#else
	94	#define count_vm_tlb_event(x) do {} while (0)
	95	#define count_vm_tlb_events(x, y) do { (void)(y); } while (0)
	96	#endif
	97
4f115147 DB	98	#ifdef CONFIG_DEBUG_VM_VMACACHE
	99	#define count_vm_vmacache_event(x) count_vm_event(x)
	100	#else
	101	#define count_vm_vmacache_event(x) do {} while (0)
	102	#endif
	103
16709d1d MG	104	#define __count_zid_vm_events(item, zid, delta) \
16709d1d MG	105	__count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
f6ac2354	106
2244b95a	107	/*
75ef7184	108	* Zone and node-based page accounting with per cpu differentials.
2244b95a	109	*/
75ef7184	110	extern atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS];
3a321d2a	111	extern atomic_long_t vm_numa_stat[NR_VM_NUMA_STAT_ITEMS];
75ef7184	112	extern atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS];
2244b95a	113
3a321d2a KW	114	#ifdef CONFIG_NUMA
	115	static inline void zone_numa_state_add(long x, struct zone *zone,
	116	enum numa_stat_item item)
	117	{
	118	atomic_long_add(x, &zone->vm_numa_stat[item]);
	119	atomic_long_add(x, &vm_numa_stat[item]);
	120	}
	121
	122	static inline unsigned long global_numa_state(enum numa_stat_item item)
	123	{
	124	long x = atomic_long_read(&vm_numa_stat[item]);
	125
	126	return x;
	127	}
	128
63803222	129	static inline unsigned long zone_numa_state_snapshot(struct zone *zone,
3a321d2a KW	130	enum numa_stat_item item)
	131	{
	132	long x = atomic_long_read(&zone->vm_numa_stat[item]);
63803222 KW	133	int cpu;
	134
	135	for_each_online_cpu(cpu)
	136	x += per_cpu_ptr(zone->pageset, cpu)->vm_numa_stat_diff[item];
3a321d2a KW	137
	138	return x;
	139	}
	140	#endif /* CONFIG_NUMA */
	141
2244b95a CL	142	static inline void zone_page_state_add(long x, struct zone *zone,
	143	enum zone_stat_item item)
	144	{
	145	atomic_long_add(x, &zone->vm_stat[item]);
75ef7184 MG	146	atomic_long_add(x, &vm_zone_stat[item]);
	147	}
	148
	149	static inline void node_page_state_add(long x, struct pglist_data *pgdat,
	150	enum node_stat_item item)
	151	{
	152	atomic_long_add(x, &pgdat->vm_stat[item]);
	153	atomic_long_add(x, &vm_node_stat[item]);
2244b95a CL	154	}
2244b95a CL	155
c41f012a	156	static inline unsigned long global_zone_page_state(enum zone_stat_item item)
2244b95a	157	{
75ef7184 MG	158	long x = atomic_long_read(&vm_zone_stat[item]);
	159	#ifdef CONFIG_SMP
	160	if (x < 0)
	161	x = 0;
	162	#endif
	163	return x;
	164	}
	165
	166	static inline unsigned long global_node_page_state(enum node_stat_item item)
	167	{
	168	long x = atomic_long_read(&vm_node_stat[item]);
2244b95a CL	169	#ifdef CONFIG_SMP
	170	if (x < 0)
	171	x = 0;
	172	#endif
	173	return x;
	174	}
	175
	176	static inline unsigned long zone_page_state(struct zone *zone,
	177	enum zone_stat_item item)
	178	{
	179	long x = atomic_long_read(&zone->vm_stat[item]);
	180	#ifdef CONFIG_SMP
	181	if (x < 0)
	182	x = 0;
	183	#endif
	184	return x;
	185	}
	186
aa454840 CL	187	/*
	188	* More accurate version that also considers the currently pending
	189	* deltas. For that we need to loop over all cpus to find the current
	190	* deltas. There is no synchronization so the result cannot be
	191	* exactly accurate either.
	192	*/
	193	static inline unsigned long zone_page_state_snapshot(struct zone *zone,
	194	enum zone_stat_item item)
	195	{
	196	long x = atomic_long_read(&zone->vm_stat[item]);
	197
	198	#ifdef CONFIG_SMP
	199	int cpu;
	200	for_each_online_cpu(cpu)
	201	x += per_cpu_ptr(zone->pageset, cpu)->vm_stat_diff[item];
	202
	203	if (x < 0)
	204	x = 0;
	205	#endif
	206	return x;
	207	}
	208
599d0c95 MG	209	static inline unsigned long node_page_state_snapshot(pg_data_t *pgdat,
	210	enum node_stat_item item)
	211	{
	212	long x = atomic_long_read(&pgdat->vm_stat[item]);
	213
	214	#ifdef CONFIG_SMP
	215	int cpu;
	216	for_each_online_cpu(cpu)
	217	x += per_cpu_ptr(pgdat->per_cpu_nodestats, cpu)->vm_node_stat_diff[item];
	218
	219	if (x < 0)
	220	x = 0;
	221	#endif
	222	return x;
	223	}
	224
	225
2244b95a	226	#ifdef CONFIG_NUMA
3a321d2a	227	extern void __inc_numa_state(struct zone *zone, enum numa_stat_item item);
75ef7184	228	extern unsigned long sum_zone_node_page_state(int node,
3a321d2a KW	229	enum zone_stat_item item);
3a321d2a KW	230	extern unsigned long sum_zone_numa_state(int node, enum numa_stat_item item);
75ef7184 MG	231	extern unsigned long node_page_state(struct pglist_data *pgdat,
75ef7184 MG	232	enum node_stat_item item);
2244b95a	233	#else
c41f012a	234	#define sum_zone_node_page_state(node, item) global_zone_page_state(item)
75ef7184	235	#define node_page_state(node, item) global_node_page_state(item)
ca889e6c	236	#endif /* CONFIG_NUMA */
2244b95a	237
2244b95a CL	238	#define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
2244b95a CL	239	#define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
75ef7184 MG	240	#define add_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, __d)
75ef7184 MG	241	#define sub_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, -(__d))
2244b95a	242
2244b95a	243	#ifdef CONFIG_SMP
6cdb18ad	244	void __mod_zone_page_state(struct zone *, enum zone_stat_item item, long);
2244b95a CL	245	void __inc_zone_page_state(struct page *, enum zone_stat_item);
2244b95a CL	246	void __dec_zone_page_state(struct page *, enum zone_stat_item);
f6ac2354	247
75ef7184 MG	248	void __mod_node_page_state(struct pglist_data *, enum node_stat_item item, long);
	249	void __inc_node_page_state(struct page *, enum node_stat_item);
	250	void __dec_node_page_state(struct page *, enum node_stat_item);
	251
6cdb18ad	252	void mod_zone_page_state(struct zone *, enum zone_stat_item, long);
2244b95a CL	253	void inc_zone_page_state(struct page *, enum zone_stat_item);
	254	void dec_zone_page_state(struct page *, enum zone_stat_item);
	255
75ef7184 MG	256	void mod_node_page_state(struct pglist_data *, enum node_stat_item, long);
	257	void inc_node_page_state(struct page *, enum node_stat_item);
	258	void dec_node_page_state(struct page *, enum node_stat_item);
	259
75ef7184	260	extern void inc_node_state(struct pglist_data *, enum node_stat_item);
c8785385	261	extern void __inc_zone_state(struct zone *, enum zone_stat_item);
75ef7184	262	extern void __inc_node_state(struct pglist_data *, enum node_stat_item);
c8785385 CL	263	extern void dec_zone_state(struct zone *, enum zone_stat_item);
c8785385 CL	264	extern void __dec_zone_state(struct zone *, enum zone_stat_item);
75ef7184	265	extern void __dec_node_state(struct pglist_data *, enum node_stat_item);
2244b95a	266
0eb77e98	267	void quiet_vmstat(void);
2bb921e5	268	void cpu_vm_stats_fold(int cpu);
a6cccdc3	269	void refresh_zone_stat_thresholds(void);
b44129b3	270
52b6f46b HD	271	struct ctl_table;
	272	int vmstat_refresh(struct ctl_table *, int write,
	273	void __user buffer, size_t lenp, loff_t *ppos);
	274
5a883813 MK	275	void drain_zonestat(struct zone zone, struct per_cpu_pageset );
5a883813 MK	276
b44129b3 MG	277	int calculate_pressure_threshold(struct zone *zone);
	278	int calculate_normal_threshold(struct zone *zone);
	279	void set_pgdat_percpu_threshold(pg_data_t *pgdat,
	280	int (calculate_pressure)(struct zone ));
2244b95a CL	281	#else /* CONFIG_SMP */
	282
	283	/*
	284	* We do not maintain differentials in a single processor configuration.
	285	* The functions directly modify the zone and global counters.
	286	*/
	287	static inline void __mod_zone_page_state(struct zone *zone,
6cdb18ad	288	enum zone_stat_item item, long delta)
2244b95a CL	289	{
	290	zone_page_state_add(delta, zone, item);
	291	}
	292
75ef7184 MG	293	static inline void __mod_node_page_state(struct pglist_data *pgdat,
	294	enum node_stat_item item, int delta)
	295	{
	296	node_page_state_add(delta, pgdat, item);
	297	}
	298
7f4599e9 CL	299	static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
	300	{
	301	atomic_long_inc(&zone->vm_stat[item]);
75ef7184 MG	302	atomic_long_inc(&vm_zone_stat[item]);
	303	}
	304
	305	static inline void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
	306	{
	307	atomic_long_inc(&pgdat->vm_stat[item]);
	308	atomic_long_inc(&vm_node_stat[item]);
7f4599e9 CL	309	}
7f4599e9 CL	310
c8785385 CL	311	static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
	312	{
	313	atomic_long_dec(&zone->vm_stat[item]);
75ef7184 MG	314	atomic_long_dec(&vm_zone_stat[item]);
	315	}
	316
	317	static inline void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
	318	{
	319	atomic_long_dec(&pgdat->vm_stat[item]);
	320	atomic_long_dec(&vm_node_stat[item]);
c8785385 CL	321	}
c8785385 CL	322
6a3ed212 JW	323	static inline void __inc_zone_page_state(struct page *page,
	324	enum zone_stat_item item)
	325	{
	326	__inc_zone_state(page_zone(page), item);
	327	}
	328
75ef7184 MG	329	static inline void __inc_node_page_state(struct page *page,
	330	enum node_stat_item item)
	331	{
	332	__inc_node_state(page_pgdat(page), item);
	333	}
	334
	335
2244b95a CL	336	static inline void __dec_zone_page_state(struct page *page,
	337	enum zone_stat_item item)
	338	{
57ce36fe	339	__dec_zone_state(page_zone(page), item);
2244b95a CL	340	}
2244b95a CL	341
75ef7184 MG	342	static inline void __dec_node_page_state(struct page *page,
	343	enum node_stat_item item)
	344	{
	345	__dec_node_state(page_pgdat(page), item);
	346	}
	347
	348
2244b95a CL	349	/*
	350	* We only use atomic operations to update counters. So there is no need to
	351	* disable interrupts.
	352	*/
	353	#define inc_zone_page_state __inc_zone_page_state
	354	#define dec_zone_page_state __dec_zone_page_state
	355	#define mod_zone_page_state __mod_zone_page_state
	356
75ef7184 MG	357	#define inc_node_page_state __inc_node_page_state
	358	#define dec_node_page_state __dec_node_page_state
	359	#define mod_node_page_state __mod_node_page_state
	360
6a3ed212	361	#define inc_zone_state __inc_zone_state
75ef7184	362	#define inc_node_state __inc_node_state
6a3ed212 JW	363	#define dec_zone_state __dec_zone_state
6a3ed212 JW	364
b44129b3	365	#define set_pgdat_percpu_threshold(pgdat, callback) { }
88f5acf8	366
a6cccdc3	367	static inline void refresh_zone_stat_thresholds(void) { }
2bb921e5	368	static inline void cpu_vm_stats_fold(int cpu) { }
0eb77e98	369	static inline void quiet_vmstat(void) { }
a6cccdc3	370
5a883813 MK	371	static inline void drain_zonestat(struct zone *zone,
5a883813 MK	372	struct per_cpu_pageset *pset) { }
fa25c503 KM	373	#endif /* CONFIG_SMP */
fa25c503 KM	374
d1ce749a BZ	375	static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages,
	376	int migratetype)
	377	{
	378	__mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages);
	379	if (is_migrate_cma(migratetype))
	380	__mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages);
	381	}
	382
fa25c503	383	extern const char * const vmstat_text[];
2244b95a CL	384
2244b95a CL	385	#endif /* _LINUX_VMSTAT_H */