319 lines
8.1 KiB
C
319 lines
8.1 KiB
C
#ifndef _LINUX_VMSTAT_H
|
|
#define _LINUX_VMSTAT_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/mmzone.h>
|
|
#include <asm/atomic.h>
|
|
|
|
#ifdef CONFIG_ZONE_DMA
|
|
#define DMA_ZONE(xx) xx##_DMA,
|
|
#else
|
|
#define DMA_ZONE(xx)
|
|
#endif
|
|
|
|
#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) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE
|
|
|
|
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),
|
|
#ifdef CONFIG_NUMA
|
|
PGSCAN_ZONE_RECLAIM_FAILED,
|
|
#endif
|
|
PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL,
|
|
KSWAPD_LOW_WMARK_HIT_QUICKLY, KSWAPD_HIGH_WMARK_HIT_QUICKLY,
|
|
KSWAPD_SKIP_CONGESTION_WAIT,
|
|
PAGEOUTRUN, ALLOCSTALL, PGROTATED,
|
|
#ifdef CONFIG_COMPACTION
|
|
COMPACTBLOCKS, COMPACTPAGES, COMPACTPAGEFAILED,
|
|
COMPACTSTALL, COMPACTFAIL, COMPACTSUCCESS,
|
|
#endif
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL,
|
|
#endif
|
|
UNEVICTABLE_PGCULLED, /* culled to noreclaim list */
|
|
UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */
|
|
UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */
|
|
UNEVICTABLE_PGMLOCKED,
|
|
UNEVICTABLE_PGMUNLOCKED,
|
|
UNEVICTABLE_PGCLEARED, /* on COW, page truncate */
|
|
UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */
|
|
UNEVICTABLE_MLOCKFREED,
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
|
THP_FAULT_ALLOC,
|
|
THP_FAULT_FALLBACK,
|
|
THP_COLLAPSE_ALLOC,
|
|
THP_COLLAPSE_ALLOC_FAILED,
|
|
THP_SPLIT,
|
|
#endif
|
|
NR_VM_EVENT_ITEMS
|
|
};
|
|
|
|
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);
|
|
|
|
static inline void __count_vm_event(enum vm_event_item item)
|
|
{
|
|
__this_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)
|
|
{
|
|
__this_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 *);
|
|
#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 */
|
|
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 */
|
|
|
|
#define __count_zone_vm_events(item, zone, delta) \
|
|
__count_vm_events(item##_NORMAL - ZONE_NORMAL + \
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
extern unsigned long global_reclaimable_pages(void);
|
|
extern unsigned long zone_reclaimable_pages(struct zone *zone);
|
|
|
|
#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_DMA
|
|
zone_page_state(&zones[ZONE_DMA], item) +
|
|
#endif
|
|
#ifdef CONFIG_ZONE_DMA32
|
|
zone_page_state(&zones[ZONE_DMA32], item) +
|
|
#endif
|
|
#ifdef CONFIG_HIGHMEM
|
|
zone_page_state(&zones[ZONE_HIGHMEM], item) +
|
|
#endif
|
|
zone_page_state(&zones[ZONE_NORMAL], item) +
|
|
zone_page_state(&zones[ZONE_MOVABLE], item);
|
|
}
|
|
|
|
extern void zone_statistics(struct zone *, struct zone *, gfp_t gfp);
|
|
|
|
#else
|
|
|
|
#define node_page_state(node, item) global_page_state(item)
|
|
#define zone_statistics(_zl, _z, gfp) 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))
|
|
|
|
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);
|
|
extern void __inc_zone_state(struct zone *, enum zone_stat_item);
|
|
extern void dec_zone_state(struct zone *, enum zone_stat_item);
|
|
extern void __dec_zone_state(struct zone *, enum zone_stat_item);
|
|
|
|
void refresh_cpu_vm_stats(int);
|
|
|
|
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, 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_state(struct zone *zone, enum zone_stat_item item)
|
|
{
|
|
atomic_long_dec(&zone->vm_stat[item]);
|
|
atomic_long_dec(&vm_stat[item]);
|
|
}
|
|
|
|
static inline void __dec_zone_page_state(struct page *page,
|
|
enum zone_stat_item item)
|
|
{
|
|
__dec_zone_state(page_zone(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 set_pgdat_percpu_threshold(pgdat, callback) { }
|
|
|
|
static inline void refresh_cpu_vm_stats(int cpu) { }
|
|
#endif
|
|
|
|
#endif /* _LINUX_VMSTAT_H */
|