| /* 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> |
| #include <linux/mmdebug.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); |
| int sysctl_vm_numa_stat_handler(struct ctl_table *table, int write, |
| void *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_pageout; |
| unsigned nr_activate[ANON_AND_FILE]; |
| unsigned nr_ref_keep; |
| unsigned nr_unmap_fail; |
| unsigned nr_lazyfree_fail; |
| }; |
| |
| enum writeback_stat_item { |
| NR_DIRTY_THRESHOLD, |
| NR_DIRTY_BG_THRESHOLD, |
| NR_VM_WRITEBACK_STAT_ITEMS, |
| }; |
| |
| #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_pages(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 global_node_page_state(enum node_stat_item item) |
| { |
| VM_WARN_ON_ONCE(vmstat_item_in_bytes(item)); |
| |
| return global_node_page_state_pages(item); |
| } |
| |
| 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); |
| extern unsigned long node_page_state_pages(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) |
| #define node_page_state_pages(node, item) global_node_page_state_pages(item) |
| #endif /* CONFIG_NUMA */ |
| |
| #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 *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) |
| { |
| if (vmstat_item_in_bytes(item)) { |
| /* |
| * Only cgroups use subpage accounting right now; at |
| * the global level, these items still change in |
| * multiples of whole pages. Store them as pages |
| * internally to keep the per-cpu counters compact. |
| */ |
| VM_WARN_ON_ONCE(delta & (PAGE_SIZE - 1)); |
| delta >>= PAGE_SHIFT; |
| } |
| |
| 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[]; |
| |
| static inline const char *zone_stat_name(enum zone_stat_item item) |
| { |
| return vmstat_text[item]; |
| } |
| |
| #ifdef CONFIG_NUMA |
| static inline const char *numa_stat_name(enum numa_stat_item item) |
| { |
| return vmstat_text[NR_VM_ZONE_STAT_ITEMS + |
| item]; |
| } |
| #endif /* CONFIG_NUMA */ |
| |
| static inline const char *node_stat_name(enum node_stat_item item) |
| { |
| return vmstat_text[NR_VM_ZONE_STAT_ITEMS + |
| NR_VM_NUMA_STAT_ITEMS + |
| item]; |
| } |
| |
| static inline const char *lru_list_name(enum lru_list lru) |
| { |
| return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" |
| } |
| |
| static inline const char *writeback_stat_name(enum writeback_stat_item item) |
| { |
| return vmstat_text[NR_VM_ZONE_STAT_ITEMS + |
| NR_VM_NUMA_STAT_ITEMS + |
| NR_VM_NODE_STAT_ITEMS + |
| item]; |
| } |
| |
| #if defined(CONFIG_VM_EVENT_COUNTERS) || defined(CONFIG_MEMCG) |
| static inline const char *vm_event_name(enum vm_event_item item) |
| { |
| return vmstat_text[NR_VM_ZONE_STAT_ITEMS + |
| NR_VM_NUMA_STAT_ITEMS + |
| NR_VM_NODE_STAT_ITEMS + |
| NR_VM_WRITEBACK_STAT_ITEMS + |
| item]; |
| } |
| #endif /* CONFIG_VM_EVENT_COUNTERS || CONFIG_MEMCG */ |
| |
| #ifdef CONFIG_MEMCG |
| |
| void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
| int val); |
| |
| static inline void mod_lruvec_state(struct lruvec *lruvec, |
| enum node_stat_item idx, int val) |
| { |
| unsigned long flags; |
| |
| local_irq_save(flags); |
| __mod_lruvec_state(lruvec, idx, val); |
| local_irq_restore(flags); |
| } |
| |
| void __mod_lruvec_page_state(struct page *page, |
| enum node_stat_item idx, int val); |
| |
| static inline void mod_lruvec_page_state(struct page *page, |
| enum node_stat_item idx, int val) |
| { |
| unsigned long flags; |
| |
| local_irq_save(flags); |
| __mod_lruvec_page_state(page, idx, val); |
| local_irq_restore(flags); |
| } |
| |
| #else |
| |
| static inline void __mod_lruvec_state(struct lruvec *lruvec, |
| enum node_stat_item idx, int val) |
| { |
| __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
| } |
| |
| static inline void mod_lruvec_state(struct lruvec *lruvec, |
| enum node_stat_item idx, int val) |
| { |
| mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
| } |
| |
| static inline void __mod_lruvec_page_state(struct page *page, |
| enum node_stat_item idx, int val) |
| { |
| __mod_node_page_state(page_pgdat(page), idx, val); |
| } |
| |
| static inline void mod_lruvec_page_state(struct page *page, |
| enum node_stat_item idx, int val) |
| { |
| mod_node_page_state(page_pgdat(page), idx, val); |
| } |
| |
| #endif /* CONFIG_MEMCG */ |
| |
| static inline void __inc_lruvec_state(struct lruvec *lruvec, |
| enum node_stat_item idx) |
| { |
| __mod_lruvec_state(lruvec, idx, 1); |
| } |
| |
| static inline void __dec_lruvec_state(struct lruvec *lruvec, |
| enum node_stat_item idx) |
| { |
| __mod_lruvec_state(lruvec, idx, -1); |
| } |
| |
| static inline void __inc_lruvec_page_state(struct page *page, |
| enum node_stat_item idx) |
| { |
| __mod_lruvec_page_state(page, idx, 1); |
| } |
| |
| static inline void __dec_lruvec_page_state(struct page *page, |
| enum node_stat_item idx) |
| { |
| __mod_lruvec_page_state(page, idx, -1); |
| } |
| |
| static inline void inc_lruvec_state(struct lruvec *lruvec, |
| enum node_stat_item idx) |
| { |
| mod_lruvec_state(lruvec, idx, 1); |
| } |
| |
| static inline void dec_lruvec_state(struct lruvec *lruvec, |
| enum node_stat_item idx) |
| { |
| mod_lruvec_state(lruvec, idx, -1); |
| } |
| |
| static inline void inc_lruvec_page_state(struct page *page, |
| enum node_stat_item idx) |
| { |
| mod_lruvec_page_state(page, idx, 1); |
| } |
| |
| static inline void dec_lruvec_page_state(struct page *page, |
| enum node_stat_item idx) |
| { |
| mod_lruvec_page_state(page, idx, -1); |
| } |
| |
| #endif /* _LINUX_VMSTAT_H */ |