237 lines
6.0 KiB
C
237 lines
6.0 KiB
C
#ifndef _LINUX_VMSTAT_H
|
|
#define _LINUX_VMSTAT_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/mmzone.h>
|
|
#include <asm/atomic.h>
|
|
|
|
#ifdef CONFIG_VM_EVENT_COUNTERS
|
|
/*
|
|
* Light weight per cpu counter implementation.
|
|
*
|
|
* Counters should only be incremented. You need to set EMBEDDED
|
|
* to disable VM_EVENT_COUNTERS. Things like procps (vmstat,
|
|
* top, etc) use /proc/vmstat and depend on these counters.
|
|
*
|
|
* Counters are handled completely inline. On many platforms the code
|
|
* generated will simply be the increment of a global address.
|
|
*/
|
|
|
|
#ifdef CONFIG_ZONE_DMA32
|
|
#define DMA32_ZONE(xx) xx##_DMA32,
|
|
#else
|
|
#define DMA32_ZONE(xx)
|
|
#endif
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
#define HIGHMEM_ZONE(xx) , xx##_HIGH
|
|
#else
|
|
#define HIGHMEM_ZONE(xx)
|
|
#endif
|
|
|
|
#define FOR_ALL_ZONES(xx) xx##_DMA, DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx)
|
|
|
|
enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
|
|
FOR_ALL_ZONES(PGALLOC),
|
|
PGFREE, PGACTIVATE, PGDEACTIVATE,
|
|
PGFAULT, PGMAJFAULT,
|
|
FOR_ALL_ZONES(PGREFILL),
|
|
FOR_ALL_ZONES(PGSTEAL),
|
|
FOR_ALL_ZONES(PGSCAN_KSWAPD),
|
|
FOR_ALL_ZONES(PGSCAN_DIRECT),
|
|
PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL,
|
|
PAGEOUTRUN, ALLOCSTALL, PGROTATED,
|
|
NR_VM_EVENT_ITEMS
|
|
};
|
|
|
|
struct vm_event_state {
|
|
unsigned long event[NR_VM_EVENT_ITEMS];
|
|
};
|
|
|
|
DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
|
|
|
|
static inline void __count_vm_event(enum vm_event_item item)
|
|
{
|
|
__get_cpu_var(vm_event_states).event[item]++;
|
|
}
|
|
|
|
static inline void count_vm_event(enum vm_event_item item)
|
|
{
|
|
get_cpu_var(vm_event_states).event[item]++;
|
|
put_cpu();
|
|
}
|
|
|
|
static inline void __count_vm_events(enum vm_event_item item, long delta)
|
|
{
|
|
__get_cpu_var(vm_event_states).event[item] += delta;
|
|
}
|
|
|
|
static inline void count_vm_events(enum vm_event_item item, long delta)
|
|
{
|
|
get_cpu_var(vm_event_states).event[item] += delta;
|
|
put_cpu();
|
|
}
|
|
|
|
extern void all_vm_events(unsigned long *);
|
|
#ifdef CONFIG_HOTPLUG
|
|
extern void vm_events_fold_cpu(int cpu);
|
|
#else
|
|
static inline void vm_events_fold_cpu(int cpu)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#else
|
|
|
|
/* Disable counters */
|
|
#define get_cpu_vm_events(e) 0L
|
|
#define count_vm_event(e) do { } while (0)
|
|
#define count_vm_events(e,d) do { } while (0)
|
|
#define __count_vm_event(e) do { } while (0)
|
|
#define __count_vm_events(e,d) do { } while (0)
|
|
#define vm_events_fold_cpu(x) do { } while (0)
|
|
|
|
#endif /* CONFIG_VM_EVENT_COUNTERS */
|
|
|
|
#define __count_zone_vm_events(item, zone, delta) \
|
|
__count_vm_events(item##_DMA + zone_idx(zone), delta)
|
|
|
|
/*
|
|
* Zone based page accounting with per cpu differentials.
|
|
*/
|
|
extern atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
|
|
|
|
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_stat[item]);
|
|
}
|
|
|
|
static inline unsigned long global_page_state(enum zone_stat_item item)
|
|
{
|
|
long x = atomic_long_read(&vm_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;
|
|
}
|
|
|
|
#ifdef CONFIG_NUMA
|
|
/*
|
|
* Determine the per node value of a stat item. This function
|
|
* is called frequently in a NUMA machine, so try to be as
|
|
* frugal as possible.
|
|
*/
|
|
static inline unsigned long node_page_state(int node,
|
|
enum zone_stat_item item)
|
|
{
|
|
struct zone *zones = NODE_DATA(node)->node_zones;
|
|
|
|
return
|
|
#ifdef CONFIG_ZONE_DMA32
|
|
zone_page_state(&zones[ZONE_DMA32], item) +
|
|
#endif
|
|
zone_page_state(&zones[ZONE_NORMAL], item) +
|
|
#ifdef CONFIG_HIGHMEM
|
|
zone_page_state(&zones[ZONE_HIGHMEM], item) +
|
|
#endif
|
|
zone_page_state(&zones[ZONE_DMA], item);
|
|
}
|
|
|
|
extern void zone_statistics(struct zonelist *, struct zone *);
|
|
|
|
#else
|
|
|
|
#define node_page_state(node, item) global_page_state(item)
|
|
#define zone_statistics(_zl,_z) do { } while (0)
|
|
|
|
#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_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))
|
|
|
|
static inline void zap_zone_vm_stats(struct zone *zone)
|
|
{
|
|
memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
|
|
}
|
|
|
|
extern void inc_zone_state(struct zone *, enum zone_stat_item);
|
|
|
|
#ifdef CONFIG_SMP
|
|
void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int);
|
|
void __inc_zone_page_state(struct page *, enum zone_stat_item);
|
|
void __dec_zone_page_state(struct page *, enum zone_stat_item);
|
|
|
|
void mod_zone_page_state(struct zone *, enum zone_stat_item, int);
|
|
void inc_zone_page_state(struct page *, enum zone_stat_item);
|
|
void dec_zone_page_state(struct page *, enum zone_stat_item);
|
|
|
|
extern void inc_zone_state(struct zone *, enum zone_stat_item);
|
|
|
|
void refresh_cpu_vm_stats(int);
|
|
void refresh_vm_stats(void);
|
|
|
|
#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, int delta)
|
|
{
|
|
zone_page_state_add(delta, zone, 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_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 __dec_zone_page_state(struct page *page,
|
|
enum zone_stat_item item)
|
|
{
|
|
atomic_long_dec(&page_zone(page)->vm_stat[item]);
|
|
atomic_long_dec(&vm_stat[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
|
|
|
|
static inline void refresh_cpu_vm_stats(int cpu) { }
|
|
static inline void refresh_vm_stats(void) { }
|
|
#endif
|
|
|
|
#endif /* _LINUX_VMSTAT_H */
|