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mm/vmstat.c
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/* * linux/mm/vmstat.c * * Manages VM statistics * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds |
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* * zoned VM statistics * Copyright (C) 2006 Silicon Graphics, Inc., * Christoph Lameter <christoph@lameter.com> |
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* Copyright (C) 2008-2014 Christoph Lameter |
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*/ |
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#include <linux/fs.h> |
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#include <linux/mm.h> |
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#include <linux/err.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/cpu.h> |
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#include <linux/cpumask.h> |
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#include <linux/vmstat.h> |
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#include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/debugfs.h> |
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#include <linux/sched.h> |
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#include <linux/math64.h> |
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#include <linux/writeback.h> |
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#include <linux/compaction.h> |
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#include <linux/mm_inline.h> |
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#include <linux/page_ext.h> #include <linux/page_owner.h> |
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#include "internal.h" |
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#define NUMA_STATS_THRESHOLD (U16_MAX - 2) |
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#ifdef CONFIG_VM_EVENT_COUNTERS DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}}; EXPORT_PER_CPU_SYMBOL(vm_event_states); |
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static void sum_vm_events(unsigned long *ret) |
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{ |
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int cpu; |
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int i; memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long)); |
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for_each_online_cpu(cpu) { |
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struct vm_event_state *this = &per_cpu(vm_event_states, cpu); |
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for (i = 0; i < NR_VM_EVENT_ITEMS; i++) ret[i] += this->event[i]; } } /* * Accumulate the vm event counters across all CPUs. * The result is unavoidably approximate - it can change * during and after execution of this function. */ void all_vm_events(unsigned long *ret) { |
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get_online_cpus(); |
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sum_vm_events(ret); |
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put_online_cpus(); |
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} |
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EXPORT_SYMBOL_GPL(all_vm_events); |
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/* * Fold the foreign cpu events into our own. * * This is adding to the events on one processor * but keeps the global counts constant. */ void vm_events_fold_cpu(int cpu) { struct vm_event_state *fold_state = &per_cpu(vm_event_states, cpu); int i; for (i = 0; i < NR_VM_EVENT_ITEMS; i++) { count_vm_events(i, fold_state->event[i]); fold_state->event[i] = 0; } } |
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#endif /* CONFIG_VM_EVENT_COUNTERS */ |
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/* * Manage combined zone based / global counters * * vm_stat contains the global counters */ |
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atomic_long_t vm_zone_stat[NR_VM_ZONE_STAT_ITEMS] __cacheline_aligned_in_smp; |
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atomic_long_t vm_numa_stat[NR_VM_NUMA_STAT_ITEMS] __cacheline_aligned_in_smp; |
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atomic_long_t vm_node_stat[NR_VM_NODE_STAT_ITEMS] __cacheline_aligned_in_smp; EXPORT_SYMBOL(vm_zone_stat); |
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EXPORT_SYMBOL(vm_numa_stat); |
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EXPORT_SYMBOL(vm_node_stat); |
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#ifdef CONFIG_SMP |
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int calculate_pressure_threshold(struct zone *zone) |
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{ int threshold; int watermark_distance; /* * As vmstats are not up to date, there is drift between the estimated * and real values. For high thresholds and a high number of CPUs, it * is possible for the min watermark to be breached while the estimated * value looks fine. The pressure threshold is a reduced value such * that even the maximum amount of drift will not accidentally breach * the min watermark */ watermark_distance = low_wmark_pages(zone) - min_wmark_pages(zone); threshold = max(1, (int)(watermark_distance / num_online_cpus())); /* * Maximum threshold is 125 */ threshold = min(125, threshold); return threshold; } |
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int calculate_normal_threshold(struct zone *zone) |
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{ int threshold; int mem; /* memory in 128 MB units */ /* * The threshold scales with the number of processors and the amount * of memory per zone. More memory means that we can defer updates for * longer, more processors could lead to more contention. * fls() is used to have a cheap way of logarithmic scaling. * * Some sample thresholds: * * Threshold Processors (fls) Zonesize fls(mem+1) * ------------------------------------------------------------------ * 8 1 1 0.9-1 GB 4 * 16 2 2 0.9-1 GB 4 * 20 2 2 1-2 GB 5 * 24 2 2 2-4 GB 6 * 28 2 2 4-8 GB 7 * 32 2 2 8-16 GB 8 * 4 2 2 <128M 1 * 30 4 3 2-4 GB 5 * 48 4 3 8-16 GB 8 * 32 8 4 1-2 GB 4 * 32 8 4 0.9-1GB 4 * 10 16 5 <128M 1 * 40 16 5 900M 4 * 70 64 7 2-4 GB 5 * 84 64 7 4-8 GB 6 * 108 512 9 4-8 GB 6 * 125 1024 10 8-16 GB 8 * 125 1024 10 16-32 GB 9 */ |
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mem = zone->managed_pages >> (27 - PAGE_SHIFT); |
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threshold = 2 * fls(num_online_cpus()) * (1 + fls(mem)); /* * Maximum threshold is 125 */ threshold = min(125, threshold); return threshold; } |
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/* |
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* Refresh the thresholds for each zone. |
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*/ |
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void refresh_zone_stat_thresholds(void) |
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{ |
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struct pglist_data *pgdat; |
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struct zone *zone; int cpu; int threshold; |
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/* Zero current pgdat thresholds */ for_each_online_pgdat(pgdat) { for_each_online_cpu(cpu) { per_cpu_ptr(pgdat->per_cpu_nodestats, cpu)->stat_threshold = 0; } } |
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for_each_populated_zone(zone) { |
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struct pglist_data *pgdat = zone->zone_pgdat; |
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unsigned long max_drift, tolerate_drift; |
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threshold = calculate_normal_threshold(zone); |
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for_each_online_cpu(cpu) { int pgdat_threshold; |
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per_cpu_ptr(zone->pageset, cpu)->stat_threshold = threshold; |
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/* Base nodestat threshold on the largest populated zone. */ pgdat_threshold = per_cpu_ptr(pgdat->per_cpu_nodestats, cpu)->stat_threshold; per_cpu_ptr(pgdat->per_cpu_nodestats, cpu)->stat_threshold = max(threshold, pgdat_threshold); } |
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/* * Only set percpu_drift_mark if there is a danger that * NR_FREE_PAGES reports the low watermark is ok when in fact * the min watermark could be breached by an allocation */ tolerate_drift = low_wmark_pages(zone) - min_wmark_pages(zone); max_drift = num_online_cpus() * threshold; if (max_drift > tolerate_drift) zone->percpu_drift_mark = high_wmark_pages(zone) + max_drift; |
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} |
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} |
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void set_pgdat_percpu_threshold(pg_data_t *pgdat, int (*calculate_pressure)(struct zone *)) |
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{ struct zone *zone; int cpu; int threshold; int i; |
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for (i = 0; i < pgdat->nr_zones; i++) { zone = &pgdat->node_zones[i]; if (!zone->percpu_drift_mark) continue; |
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threshold = (*calculate_pressure)(zone); |
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for_each_online_cpu(cpu) |
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per_cpu_ptr(zone->pageset, cpu)->stat_threshold = threshold; } |
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} |
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/* |
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* For use when we know that interrupts are disabled, * or when we know that preemption is disabled and that * particular counter cannot be updated from interrupt context. |
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*/ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item, |
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long delta) |
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{ |
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struct per_cpu_pageset __percpu *pcp = zone->pageset; s8 __percpu *p = pcp->vm_stat_diff + item; |
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long x; |
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long t; x = delta + __this_cpu_read(*p); |
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t = __this_cpu_read(pcp->stat_threshold); |
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if (unlikely(x > t || x < -t)) { |
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zone_page_state_add(x, zone, item); x = 0; } |
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__this_cpu_write(*p, x); |
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} EXPORT_SYMBOL(__mod_zone_page_state); |
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void __mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item, long delta) { struct per_cpu_nodestat __percpu *pcp = pgdat->per_cpu_nodestats; s8 __percpu *p = pcp->vm_node_stat_diff + item; long x; long t; x = delta + __this_cpu_read(*p); t = __this_cpu_read(pcp->stat_threshold); if (unlikely(x > t || x < -t)) { node_page_state_add(x, pgdat, item); x = 0; } __this_cpu_write(*p, x); } EXPORT_SYMBOL(__mod_node_page_state); |
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/* |
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* Optimized increment and decrement functions. * * These are only for a single page and therefore can take a struct page * * argument instead of struct zone *. This allows the inclusion of the code * generated for page_zone(page) into the optimized functions. * * No overflow check is necessary and therefore the differential can be * incremented or decremented in place which may allow the compilers to * generate better code. |
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* The increment or decrement is known and therefore one boundary check can * be omitted. * |
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* NOTE: These functions are very performance sensitive. Change only * with care. * |
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* Some processors have inc/dec instructions that are atomic vs an interrupt. * However, the code must first determine the differential location in a zone * based on the processor number and then inc/dec the counter. There is no * guarantee without disabling preemption that the processor will not change * in between and therefore the atomicity vs. interrupt cannot be exploited * in a useful way here. */ |
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void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
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{ |
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struct per_cpu_pageset __percpu *pcp = zone->pageset; s8 __percpu *p = pcp->vm_stat_diff + item; s8 v, t; |
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v = __this_cpu_inc_return(*p); |
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t = __this_cpu_read(pcp->stat_threshold); if (unlikely(v > t)) { s8 overstep = t >> 1; |
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zone_page_state_add(v + overstep, zone, item); __this_cpu_write(*p, -overstep); |
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} } |
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void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item) { struct per_cpu_nodestat __percpu *pcp = pgdat->per_cpu_nodestats; s8 __percpu *p = pcp->vm_node_stat_diff + item; s8 v, t; v = __this_cpu_inc_return(*p); t = __this_cpu_read(pcp->stat_threshold); if (unlikely(v > t)) { s8 overstep = t >> 1; node_page_state_add(v + overstep, pgdat, item); __this_cpu_write(*p, -overstep); } } |
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void __inc_zone_page_state(struct page *page, enum zone_stat_item item) { __inc_zone_state(page_zone(page), item); } |
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EXPORT_SYMBOL(__inc_zone_page_state); |
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void __inc_node_page_state(struct page *page, enum node_stat_item item) { __inc_node_state(page_pgdat(page), item); } EXPORT_SYMBOL(__inc_node_page_state); |
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void __dec_zone_state(struct zone *zone, enum zone_stat_item item) |
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{ |
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struct per_cpu_pageset __percpu *pcp = zone->pageset; s8 __percpu *p = pcp->vm_stat_diff + item; s8 v, t; |
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v = __this_cpu_dec_return(*p); |
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t = __this_cpu_read(pcp->stat_threshold); if (unlikely(v < - t)) { s8 overstep = t >> 1; |
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zone_page_state_add(v - overstep, zone, item); __this_cpu_write(*p, overstep); |
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} } |
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void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item) { struct per_cpu_nodestat __percpu *pcp = pgdat->per_cpu_nodestats; s8 __percpu *p = pcp->vm_node_stat_diff + item; s8 v, t; v = __this_cpu_dec_return(*p); t = __this_cpu_read(pcp->stat_threshold); if (unlikely(v < - t)) { s8 overstep = t >> 1; node_page_state_add(v - overstep, pgdat, item); __this_cpu_write(*p, overstep); } } |
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void __dec_zone_page_state(struct page *page, enum zone_stat_item item) { __dec_zone_state(page_zone(page), item); } |
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EXPORT_SYMBOL(__dec_zone_page_state); |
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void __dec_node_page_state(struct page *page, enum node_stat_item item) { __dec_node_state(page_pgdat(page), item); } EXPORT_SYMBOL(__dec_node_page_state); |
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#ifdef CONFIG_HAVE_CMPXCHG_LOCAL |
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/* * If we have cmpxchg_local support then we do not need to incur the overhead * that comes with local_irq_save/restore if we use this_cpu_cmpxchg. * * mod_state() modifies the zone counter state through atomic per cpu * operations. * * Overstep mode specifies how overstep should handled: * 0 No overstepping * 1 Overstepping half of threshold * -1 Overstepping minus half of threshold */ |
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static inline void mod_zone_state(struct zone *zone, enum zone_stat_item item, long delta, int overstep_mode) |
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{ struct per_cpu_pageset __percpu *pcp = zone->pageset; s8 __percpu *p = pcp->vm_stat_diff + item; long o, n, t, z; do { z = 0; /* overflow to zone counters */ /* * The fetching of the stat_threshold is racy. We may apply * a counter threshold to the wrong the cpu if we get |
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* rescheduled while executing here. However, the next * counter update will apply the threshold again and * therefore bring the counter under the threshold again. * * Most of the time the thresholds are the same anyways * for all cpus in a zone. |
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*/ t = this_cpu_read(pcp->stat_threshold); o = this_cpu_read(*p); n = delta + o; if (n > t || n < -t) { int os = overstep_mode * (t >> 1) ; /* Overflow must be added to zone counters */ z = n + os; n = -os; } } while (this_cpu_cmpxchg(*p, o, n) != o); if (z) zone_page_state_add(z, zone, item); } void mod_zone_page_state(struct zone *zone, enum zone_stat_item item, |
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long delta) |
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{ |
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mod_zone_state(zone, item, delta, 0); |
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} EXPORT_SYMBOL(mod_zone_page_state); |
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void inc_zone_page_state(struct page *page, enum zone_stat_item item) { |
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mod_zone_state(page_zone(page), item, 1, 1); |
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} EXPORT_SYMBOL(inc_zone_page_state); void dec_zone_page_state(struct page *page, enum zone_stat_item item) { |
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mod_zone_state(page_zone(page), item, -1, -1); |
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} EXPORT_SYMBOL(dec_zone_page_state); |
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static inline void mod_node_state(struct pglist_data *pgdat, enum node_stat_item item, int delta, int overstep_mode) { struct per_cpu_nodestat __percpu *pcp = pgdat->per_cpu_nodestats; s8 __percpu *p = pcp->vm_node_stat_diff + item; long o, n, t, z; do { z = 0; /* overflow to node counters */ /* * The fetching of the stat_threshold is racy. We may apply * a counter threshold to the wrong the cpu if we get * rescheduled while executing here. However, the next * counter update will apply the threshold again and * therefore bring the counter under the threshold again. * * Most of the time the thresholds are the same anyways * for all cpus in a node. */ t = this_cpu_read(pcp->stat_threshold); o = this_cpu_read(*p); n = delta + o; if (n > t || n < -t) { int os = overstep_mode * (t >> 1) ; /* Overflow must be added to node counters */ z = n + os; n = -os; } } while (this_cpu_cmpxchg(*p, o, n) != o); if (z) node_page_state_add(z, pgdat, item); } void mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item, long delta) { mod_node_state(pgdat, item, delta, 0); } EXPORT_SYMBOL(mod_node_page_state); void inc_node_state(struct pglist_data *pgdat, enum node_stat_item item) { mod_node_state(pgdat, item, 1, 1); } void inc_node_page_state(struct page *page, enum node_stat_item item) { mod_node_state(page_pgdat(page), item, 1, 1); } EXPORT_SYMBOL(inc_node_page_state); void dec_node_page_state(struct page *page, enum node_stat_item item) { mod_node_state(page_pgdat(page), item, -1, -1); } EXPORT_SYMBOL(dec_node_page_state); |
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#else /* * Use interrupt disable to serialize counter updates */ void mod_zone_page_state(struct zone *zone, enum zone_stat_item item, |
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long delta) |
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{ unsigned long flags; local_irq_save(flags); __mod_zone_page_state(zone, item, delta); local_irq_restore(flags); } EXPORT_SYMBOL(mod_zone_page_state); |
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514 515 516 517 |
void inc_zone_page_state(struct page *page, enum zone_stat_item item) { unsigned long flags; struct zone *zone; |
2244b95a7 [PATCH] zoned vm ... |
518 519 520 |
zone = page_zone(page); local_irq_save(flags); |
ca889e6c4 [PATCH] Use Zoned... |
521 |
__inc_zone_state(zone, item); |
2244b95a7 [PATCH] zoned vm ... |
522 523 524 525 526 527 528 |
local_irq_restore(flags); } EXPORT_SYMBOL(inc_zone_page_state); void dec_zone_page_state(struct page *page, enum zone_stat_item item) { unsigned long flags; |
2244b95a7 [PATCH] zoned vm ... |
529 |
|
2244b95a7 [PATCH] zoned vm ... |
530 |
local_irq_save(flags); |
a302eb4e4 [PATCH] ZVC: Over... |
531 |
__dec_zone_page_state(page, item); |
2244b95a7 [PATCH] zoned vm ... |
532 533 534 |
local_irq_restore(flags); } EXPORT_SYMBOL(dec_zone_page_state); |
75ef71840 mm, vmstat: add i... |
535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 |
void inc_node_state(struct pglist_data *pgdat, enum node_stat_item item) { unsigned long flags; local_irq_save(flags); __inc_node_state(pgdat, item); local_irq_restore(flags); } EXPORT_SYMBOL(inc_node_state); void mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item, long delta) { unsigned long flags; local_irq_save(flags); __mod_node_page_state(pgdat, item, delta); local_irq_restore(flags); } EXPORT_SYMBOL(mod_node_page_state); void inc_node_page_state(struct page *page, enum node_stat_item item) { unsigned long flags; struct pglist_data *pgdat; pgdat = page_pgdat(page); local_irq_save(flags); __inc_node_state(pgdat, item); local_irq_restore(flags); } EXPORT_SYMBOL(inc_node_page_state); void dec_node_page_state(struct page *page, enum node_stat_item item) { unsigned long flags; local_irq_save(flags); __dec_node_page_state(page, item); local_irq_restore(flags); } EXPORT_SYMBOL(dec_node_page_state); #endif |
7cc36bbdd vmstat: on-demand... |
578 579 580 581 582 |
/* * Fold a differential into the global counters. * Returns the number of counters updated. */ |
3a321d2a3 mm: change the ca... |
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 |
#ifdef CONFIG_NUMA static int fold_diff(int *zone_diff, int *numa_diff, int *node_diff) { int i; int changes = 0; for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) if (zone_diff[i]) { atomic_long_add(zone_diff[i], &vm_zone_stat[i]); changes++; } for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) if (numa_diff[i]) { atomic_long_add(numa_diff[i], &vm_numa_stat[i]); changes++; } for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) if (node_diff[i]) { atomic_long_add(node_diff[i], &vm_node_stat[i]); changes++; } return changes; } #else |
75ef71840 mm, vmstat: add i... |
609 |
static int fold_diff(int *zone_diff, int *node_diff) |
4edb0748b vmstat: create fo... |
610 611 |
{ int i; |
7cc36bbdd vmstat: on-demand... |
612 |
int changes = 0; |
4edb0748b vmstat: create fo... |
613 614 |
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) |
75ef71840 mm, vmstat: add i... |
615 616 617 618 619 620 621 622 |
if (zone_diff[i]) { atomic_long_add(zone_diff[i], &vm_zone_stat[i]); changes++; } for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) if (node_diff[i]) { atomic_long_add(node_diff[i], &vm_node_stat[i]); |
7cc36bbdd vmstat: on-demand... |
623 624 625 |
changes++; } return changes; |
4edb0748b vmstat: create fo... |
626 |
} |
3a321d2a3 mm: change the ca... |
627 |
#endif /* CONFIG_NUMA */ |
4edb0748b vmstat: create fo... |
628 |
|
2244b95a7 [PATCH] zoned vm ... |
629 |
/* |
2bb921e52 vmstat: create se... |
630 |
* Update the zone counters for the current cpu. |
a7f75e258 vmstat: small rev... |
631 |
* |
4037d4522 Move remote node ... |
632 633 634 635 636 637 638 639 640 641 |
* Note that refresh_cpu_vm_stats strives to only access * node local memory. The per cpu pagesets on remote zones are placed * in the memory local to the processor using that pageset. So the * loop over all zones will access a series of cachelines local to * the processor. * * The call to zone_page_state_add updates the cachelines with the * statistics in the remote zone struct as well as the global cachelines * with the global counters. These could cause remote node cache line * bouncing and will have to be only done when necessary. |
7cc36bbdd vmstat: on-demand... |
642 643 |
* * The function returns the number of global counters updated. |
2244b95a7 [PATCH] zoned vm ... |
644 |
*/ |
0eb77e988 vmstat: make vmst... |
645 |
static int refresh_cpu_vm_stats(bool do_pagesets) |
2244b95a7 [PATCH] zoned vm ... |
646 |
{ |
75ef71840 mm, vmstat: add i... |
647 |
struct pglist_data *pgdat; |
2244b95a7 [PATCH] zoned vm ... |
648 649 |
struct zone *zone; int i; |
75ef71840 mm, vmstat: add i... |
650 |
int global_zone_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, }; |
3a321d2a3 mm: change the ca... |
651 652 653 |
#ifdef CONFIG_NUMA int global_numa_diff[NR_VM_NUMA_STAT_ITEMS] = { 0, }; #endif |
75ef71840 mm, vmstat: add i... |
654 |
int global_node_diff[NR_VM_NODE_STAT_ITEMS] = { 0, }; |
7cc36bbdd vmstat: on-demand... |
655 |
int changes = 0; |
2244b95a7 [PATCH] zoned vm ... |
656 |
|
ee99c71c5 mm: introduce for... |
657 |
for_each_populated_zone(zone) { |
fbc2edb05 vmstat: use this_... |
658 |
struct per_cpu_pageset __percpu *p = zone->pageset; |
2244b95a7 [PATCH] zoned vm ... |
659 |
|
fbc2edb05 vmstat: use this_... |
660 661 |
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) { int v; |
2244b95a7 [PATCH] zoned vm ... |
662 |
|
fbc2edb05 vmstat: use this_... |
663 664 |
v = this_cpu_xchg(p->vm_stat_diff[i], 0); if (v) { |
a7f75e258 vmstat: small rev... |
665 |
|
a7f75e258 vmstat: small rev... |
666 |
atomic_long_add(v, &zone->vm_stat[i]); |
75ef71840 mm, vmstat: add i... |
667 |
global_zone_diff[i] += v; |
4037d4522 Move remote node ... |
668 669 |
#ifdef CONFIG_NUMA /* 3 seconds idle till flush */ |
fbc2edb05 vmstat: use this_... |
670 |
__this_cpu_write(p->expire, 3); |
4037d4522 Move remote node ... |
671 |
#endif |
2244b95a7 [PATCH] zoned vm ... |
672 |
} |
fbc2edb05 vmstat: use this_... |
673 |
} |
4037d4522 Move remote node ... |
674 |
#ifdef CONFIG_NUMA |
3a321d2a3 mm: change the ca... |
675 676 677 678 679 680 681 682 683 684 685 |
for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) { int v; v = this_cpu_xchg(p->vm_numa_stat_diff[i], 0); if (v) { atomic_long_add(v, &zone->vm_numa_stat[i]); global_numa_diff[i] += v; __this_cpu_write(p->expire, 3); } } |
0eb77e988 vmstat: make vmst... |
686 687 688 689 690 691 692 693 694 695 |
if (do_pagesets) { cond_resched(); /* * Deal with draining the remote pageset of this * processor * * Check if there are pages remaining in this pageset * if not then there is nothing to expire. */ if (!__this_cpu_read(p->expire) || |
fbc2edb05 vmstat: use this_... |
696 |
!__this_cpu_read(p->pcp.count)) |
0eb77e988 vmstat: make vmst... |
697 |
continue; |
4037d4522 Move remote node ... |
698 |
|
0eb77e988 vmstat: make vmst... |
699 700 701 702 703 704 705 |
/* * We never drain zones local to this processor. */ if (zone_to_nid(zone) == numa_node_id()) { __this_cpu_write(p->expire, 0); continue; } |
4037d4522 Move remote node ... |
706 |
|
0eb77e988 vmstat: make vmst... |
707 708 |
if (__this_cpu_dec_return(p->expire)) continue; |
4037d4522 Move remote node ... |
709 |
|
0eb77e988 vmstat: make vmst... |
710 711 712 713 |
if (__this_cpu_read(p->pcp.count)) { drain_zone_pages(zone, this_cpu_ptr(&p->pcp)); changes++; } |
7cc36bbdd vmstat: on-demand... |
714 |
} |
4037d4522 Move remote node ... |
715 |
#endif |
2244b95a7 [PATCH] zoned vm ... |
716 |
} |
75ef71840 mm, vmstat: add i... |
717 718 719 720 721 722 723 724 725 726 727 728 729 730 |
for_each_online_pgdat(pgdat) { struct per_cpu_nodestat __percpu *p = pgdat->per_cpu_nodestats; for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) { int v; v = this_cpu_xchg(p->vm_node_stat_diff[i], 0); if (v) { atomic_long_add(v, &pgdat->vm_stat[i]); global_node_diff[i] += v; } } } |
3a321d2a3 mm: change the ca... |
731 732 733 734 |
#ifdef CONFIG_NUMA changes += fold_diff(global_zone_diff, global_numa_diff, global_node_diff); #else |
75ef71840 mm, vmstat: add i... |
735 |
changes += fold_diff(global_zone_diff, global_node_diff); |
3a321d2a3 mm: change the ca... |
736 |
#endif |
7cc36bbdd vmstat: on-demand... |
737 |
return changes; |
2244b95a7 [PATCH] zoned vm ... |
738 |
} |
40f4b1ead mm/vmstat: add no... |
739 |
/* |
2bb921e52 vmstat: create se... |
740 741 742 743 744 745 |
* Fold the data for an offline cpu into the global array. * There cannot be any access by the offline cpu and therefore * synchronization is simplified. */ void cpu_vm_stats_fold(int cpu) { |
75ef71840 mm, vmstat: add i... |
746 |
struct pglist_data *pgdat; |
2bb921e52 vmstat: create se... |
747 748 |
struct zone *zone; int i; |
75ef71840 mm, vmstat: add i... |
749 |
int global_zone_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, }; |
3a321d2a3 mm: change the ca... |
750 751 752 |
#ifdef CONFIG_NUMA int global_numa_diff[NR_VM_NUMA_STAT_ITEMS] = { 0, }; #endif |
75ef71840 mm, vmstat: add i... |
753 |
int global_node_diff[NR_VM_NODE_STAT_ITEMS] = { 0, }; |
2bb921e52 vmstat: create se... |
754 755 756 757 758 759 760 761 762 763 764 765 766 |
for_each_populated_zone(zone) { struct per_cpu_pageset *p; p = per_cpu_ptr(zone->pageset, cpu); for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) if (p->vm_stat_diff[i]) { int v; v = p->vm_stat_diff[i]; p->vm_stat_diff[i] = 0; atomic_long_add(v, &zone->vm_stat[i]); |
75ef71840 mm, vmstat: add i... |
767 |
global_zone_diff[i] += v; |
2bb921e52 vmstat: create se... |
768 |
} |
3a321d2a3 mm: change the ca... |
769 770 771 772 773 774 775 776 777 778 779 780 |
#ifdef CONFIG_NUMA for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) if (p->vm_numa_stat_diff[i]) { int v; v = p->vm_numa_stat_diff[i]; p->vm_numa_stat_diff[i] = 0; atomic_long_add(v, &zone->vm_numa_stat[i]); global_numa_diff[i] += v; } #endif |
2bb921e52 vmstat: create se... |
781 |
} |
75ef71840 mm, vmstat: add i... |
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 |
for_each_online_pgdat(pgdat) { struct per_cpu_nodestat *p; p = per_cpu_ptr(pgdat->per_cpu_nodestats, cpu); for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) if (p->vm_node_stat_diff[i]) { int v; v = p->vm_node_stat_diff[i]; p->vm_node_stat_diff[i] = 0; atomic_long_add(v, &pgdat->vm_stat[i]); global_node_diff[i] += v; } } |
3a321d2a3 mm: change the ca... |
797 798 799 |
#ifdef CONFIG_NUMA fold_diff(global_zone_diff, global_numa_diff, global_node_diff); #else |
75ef71840 mm, vmstat: add i... |
800 |
fold_diff(global_zone_diff, global_node_diff); |
3a321d2a3 mm: change the ca... |
801 |
#endif |
2bb921e52 vmstat: create se... |
802 803 804 |
} /* |
40f4b1ead mm/vmstat: add no... |
805 806 807 |
* this is only called if !populated_zone(zone), which implies no other users of * pset->vm_stat_diff[] exsist. */ |
5a8838138 memory-hotplug: f... |
808 809 810 811 812 813 814 815 816 |
void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset) { int i; for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) if (pset->vm_stat_diff[i]) { int v = pset->vm_stat_diff[i]; pset->vm_stat_diff[i] = 0; atomic_long_add(v, &zone->vm_stat[i]); |
75ef71840 mm, vmstat: add i... |
817 |
atomic_long_add(v, &vm_zone_stat[i]); |
5a8838138 memory-hotplug: f... |
818 |
} |
3a321d2a3 mm: change the ca... |
819 820 821 822 823 824 825 826 827 828 829 |
#ifdef CONFIG_NUMA for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) if (pset->vm_numa_stat_diff[i]) { int v = pset->vm_numa_stat_diff[i]; pset->vm_numa_stat_diff[i] = 0; atomic_long_add(v, &zone->vm_numa_stat[i]); atomic_long_add(v, &vm_numa_stat[i]); } #endif |
5a8838138 memory-hotplug: f... |
830 |
} |
2244b95a7 [PATCH] zoned vm ... |
831 |
#endif |
ca889e6c4 [PATCH] Use Zoned... |
832 |
#ifdef CONFIG_NUMA |
3a321d2a3 mm: change the ca... |
833 834 835 836 |
void __inc_numa_state(struct zone *zone, enum numa_stat_item item) { struct per_cpu_pageset __percpu *pcp = zone->pageset; |
1d90ca897 mm: update NUMA c... |
837 838 |
u16 __percpu *p = pcp->vm_numa_stat_diff + item; u16 v; |
3a321d2a3 mm: change the ca... |
839 840 |
v = __this_cpu_inc_return(*p); |
3a321d2a3 mm: change the ca... |
841 |
|
1d90ca897 mm: update NUMA c... |
842 843 844 |
if (unlikely(v > NUMA_STATS_THRESHOLD)) { zone_numa_state_add(v, zone, item); __this_cpu_write(*p, 0); |
3a321d2a3 mm: change the ca... |
845 846 |
} } |
ca889e6c4 [PATCH] Use Zoned... |
847 |
/* |
75ef71840 mm, vmstat: add i... |
848 849 850 |
* 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. |
c2d42c16a mm/vmstat.c: unin... |
851 |
*/ |
75ef71840 mm, vmstat: add i... |
852 853 |
unsigned long sum_zone_node_page_state(int node, enum zone_stat_item item) |
c2d42c16a mm/vmstat.c: unin... |
854 855 |
{ struct zone *zones = NODE_DATA(node)->node_zones; |
e87d59f7a mm/vmstat: make n... |
856 857 |
int i; unsigned long count = 0; |
c2d42c16a mm/vmstat.c: unin... |
858 |
|
e87d59f7a mm/vmstat: make n... |
859 860 861 862 |
for (i = 0; i < MAX_NR_ZONES; i++) count += zone_page_state(zones + i, item); return count; |
c2d42c16a mm/vmstat.c: unin... |
863 |
} |
638032224 mm: consider the ... |
864 865 866 867 |
/* * Determine the per node value of a numa stat item. To avoid deviation, * the per cpu stat number in vm_numa_stat_diff[] is also included. */ |
3a321d2a3 mm: change the ca... |
868 869 870 871 872 873 874 875 |
unsigned long sum_zone_numa_state(int node, enum numa_stat_item item) { struct zone *zones = NODE_DATA(node)->node_zones; int i; unsigned long count = 0; for (i = 0; i < MAX_NR_ZONES; i++) |
638032224 mm: consider the ... |
876 |
count += zone_numa_state_snapshot(zones + i, item); |
3a321d2a3 mm: change the ca... |
877 878 879 |
return count; } |
75ef71840 mm, vmstat: add i... |
880 881 882 883 884 885 886 887 888 889 890 891 892 |
/* * Determine the per node value of a stat item. */ unsigned long node_page_state(struct pglist_data *pgdat, enum node_stat_item item) { long x = atomic_long_read(&pgdat->vm_stat[item]); #ifdef CONFIG_SMP if (x < 0) x = 0; #endif return x; } |
ca889e6c4 [PATCH] Use Zoned... |
893 |
#endif |
d7a5752c0 mm: export unusab... |
894 |
#ifdef CONFIG_COMPACTION |
36deb0be3 vmstat: include c... |
895 |
|
d7a5752c0 mm: export unusab... |
896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 |
struct contig_page_info { unsigned long free_pages; unsigned long free_blocks_total; unsigned long free_blocks_suitable; }; /* * Calculate the number of free pages in a zone, how many contiguous * pages are free and how many are large enough to satisfy an allocation of * the target size. Note that this function makes no attempt to estimate * how many suitable free blocks there *might* be if MOVABLE pages were * migrated. Calculating that is possible, but expensive and can be * figured out from userspace */ static void fill_contig_page_info(struct zone *zone, unsigned int suitable_order, struct contig_page_info *info) { unsigned int order; info->free_pages = 0; info->free_blocks_total = 0; info->free_blocks_suitable = 0; for (order = 0; order < MAX_ORDER; order++) { unsigned long blocks; /* Count number of free blocks */ blocks = zone->free_area[order].nr_free; info->free_blocks_total += blocks; /* Count free base pages */ info->free_pages += blocks << order; /* Count the suitable free blocks */ if (order >= suitable_order) info->free_blocks_suitable += blocks << (order - suitable_order); } } |
f1a5ab121 mm: export fragme... |
936 937 938 939 940 941 942 943 |
/* * A fragmentation index only makes sense if an allocation of a requested * size would fail. If that is true, the fragmentation index indicates * whether external fragmentation or a lack of memory was the problem. * The value can be used to determine if page reclaim or compaction * should be used */ |
56de7263f mm: compaction: d... |
944 |
static int __fragmentation_index(unsigned int order, struct contig_page_info *info) |
f1a5ab121 mm: export fragme... |
945 946 |
{ unsigned long requested = 1UL << order; |
88d6ac40c mm/vmstat: fix di... |
947 948 |
if (WARN_ON_ONCE(order >= MAX_ORDER)) return 0; |
f1a5ab121 mm: export fragme... |
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 |
if (!info->free_blocks_total) return 0; /* Fragmentation index only makes sense when a request would fail */ if (info->free_blocks_suitable) return -1000; /* * Index is between 0 and 1 so return within 3 decimal places * * 0 => allocation would fail due to lack of memory * 1 => allocation would fail due to fragmentation */ return 1000 - div_u64( (1000+(div_u64(info->free_pages * 1000ULL, requested))), info->free_blocks_total); } |
56de7263f mm: compaction: d... |
964 965 966 967 968 969 970 971 972 |
/* Same as __fragmentation index but allocs contig_page_info on stack */ int fragmentation_index(struct zone *zone, unsigned int order) { struct contig_page_info info; fill_contig_page_info(zone, order, &info); return __fragmentation_index(order, &info); } |
d7a5752c0 mm: export unusab... |
973 |
#endif |
0d6617c77 numa: fix NUMA co... |
974 |
#if defined(CONFIG_PROC_FS) || defined(CONFIG_SYSFS) || defined(CONFIG_NUMA) |
fa25c503d mm: per-node vmst... |
975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 |
#ifdef CONFIG_ZONE_DMA #define TEXT_FOR_DMA(xx) xx "_dma", #else #define TEXT_FOR_DMA(xx) #endif #ifdef CONFIG_ZONE_DMA32 #define TEXT_FOR_DMA32(xx) xx "_dma32", #else #define TEXT_FOR_DMA32(xx) #endif #ifdef CONFIG_HIGHMEM #define TEXT_FOR_HIGHMEM(xx) xx "_high", #else #define TEXT_FOR_HIGHMEM(xx) #endif #define TEXTS_FOR_ZONES(xx) TEXT_FOR_DMA(xx) TEXT_FOR_DMA32(xx) xx "_normal", \ TEXT_FOR_HIGHMEM(xx) xx "_movable", const char * const vmstat_text[] = { |
09316c09d mm/balloon_compac... |
997 |
/* enum zone_stat_item countes */ |
fa25c503d mm: per-node vmst... |
998 |
"nr_free_pages", |
71c799f49 mm: add per-zone ... |
999 1000 1001 1002 1003 |
"nr_zone_inactive_anon", "nr_zone_active_anon", "nr_zone_inactive_file", "nr_zone_active_file", "nr_zone_unevictable", |
5a1c84b40 mm: remove reclai... |
1004 |
"nr_zone_write_pending", |
fa25c503d mm: per-node vmst... |
1005 |
"nr_mlock", |
fa25c503d mm: per-node vmst... |
1006 1007 |
"nr_page_table_pages", "nr_kernel_stack", |
fa25c503d mm: per-node vmst... |
1008 |
"nr_bounce", |
91537fee0 mm: add NR_ZSMALL... |
1009 1010 1011 |
#if IS_ENABLED(CONFIG_ZSMALLOC) "nr_zspages", #endif |
3a321d2a3 mm: change the ca... |
1012 1013 1014 |
"nr_free_cma", /* enum numa_stat_item counters */ |
fa25c503d mm: per-node vmst... |
1015 1016 1017 1018 1019 1020 1021 1022 |
#ifdef CONFIG_NUMA "numa_hit", "numa_miss", "numa_foreign", "numa_interleave", "numa_local", "numa_other", #endif |
09316c09d mm/balloon_compac... |
1023 |
|
599d0c954 mm, vmscan: move ... |
1024 1025 1026 1027 1028 1029 |
/* Node-based counters */ "nr_inactive_anon", "nr_active_anon", "nr_inactive_file", "nr_active_file", "nr_unevictable", |
385386cff mm: vmstat: move ... |
1030 1031 |
"nr_slab_reclaimable", "nr_slab_unreclaimable", |
599d0c954 mm, vmscan: move ... |
1032 1033 |
"nr_isolated_anon", "nr_isolated_file", |
1e6b10857 mm, workingset: m... |
1034 1035 1036 |
"workingset_refault", "workingset_activate", "workingset_nodereclaim", |
50658e2e0 mm: move page map... |
1037 1038 |
"nr_anon_pages", "nr_mapped", |
11fb99898 mm: move most fil... |
1039 1040 1041 1042 1043 1044 1045 1046 1047 |
"nr_file_pages", "nr_dirty", "nr_writeback", "nr_writeback_temp", "nr_shmem", "nr_shmem_hugepages", "nr_shmem_pmdmapped", "nr_anon_transparent_hugepages", "nr_unstable", |
c4a25635b mm: move vmscan w... |
1048 1049 1050 1051 |
"nr_vmscan_write", "nr_vmscan_immediate_reclaim", "nr_dirtied", "nr_written", |
d62b8ac8c mm: don't show nr... |
1052 |
"", /* nr_indirectly_reclaimable */ |
599d0c954 mm, vmscan: move ... |
1053 |
|
09316c09d mm/balloon_compac... |
1054 |
/* enum writeback_stat_item counters */ |
fa25c503d mm: per-node vmst... |
1055 1056 1057 1058 |
"nr_dirty_threshold", "nr_dirty_background_threshold", #ifdef CONFIG_VM_EVENT_COUNTERS |
09316c09d mm/balloon_compac... |
1059 |
/* enum vm_event_item counters */ |
fa25c503d mm: per-node vmst... |
1060 1061 1062 1063 1064 1065 |
"pgpgin", "pgpgout", "pswpin", "pswpout", TEXTS_FOR_ZONES("pgalloc") |
7cc30fcfd mm: vmstat: accou... |
1066 1067 |
TEXTS_FOR_ZONES("allocstall") TEXTS_FOR_ZONES("pgskip") |
fa25c503d mm: per-node vmst... |
1068 1069 1070 1071 |
"pgfree", "pgactivate", "pgdeactivate", |
f7ad2a6cb mm: move MADV_FRE... |
1072 |
"pglazyfree", |
fa25c503d mm: per-node vmst... |
1073 1074 1075 |
"pgfault", "pgmajfault", |
854e9ed09 mm: support madvi... |
1076 |
"pglazyfreed", |
fa25c503d mm: per-node vmst... |
1077 |
|
599d0c954 mm, vmscan: move ... |
1078 1079 1080 1081 1082 |
"pgrefill", "pgsteal_kswapd", "pgsteal_direct", "pgscan_kswapd", "pgscan_direct", |
68243e76e mm: account for t... |
1083 |
"pgscan_direct_throttle", |
fa25c503d mm: per-node vmst... |
1084 1085 1086 1087 1088 1089 |
#ifdef CONFIG_NUMA "zone_reclaim_failed", #endif "pginodesteal", "slabs_scanned", |
fa25c503d mm: per-node vmst... |
1090 1091 1092 |
"kswapd_inodesteal", "kswapd_low_wmark_hit_quickly", "kswapd_high_wmark_hit_quickly", |
fa25c503d mm: per-node vmst... |
1093 |
"pageoutrun", |
fa25c503d mm: per-node vmst... |
1094 1095 |
"pgrotated", |
5509a5d27 drop_caches: add ... |
1096 1097 |
"drop_pagecache", "drop_slab", |
8e675f7af mm/oom_kill: coun... |
1098 |
"oom_kill", |
5509a5d27 drop_caches: add ... |
1099 |
|
03c5a6e16 mm: numa: Add pte... |
1100 1101 |
#ifdef CONFIG_NUMA_BALANCING "numa_pte_updates", |
72403b4a0 mm: numa: return ... |
1102 |
"numa_huge_pte_updates", |
03c5a6e16 mm: numa: Add pte... |
1103 1104 1105 1106 |
"numa_hint_faults", "numa_hint_faults_local", "numa_pages_migrated", #endif |
5647bc293 mm: compaction: M... |
1107 1108 1109 1110 |
#ifdef CONFIG_MIGRATION "pgmigrate_success", "pgmigrate_fail", #endif |
fa25c503d mm: per-node vmst... |
1111 |
#ifdef CONFIG_COMPACTION |
397487db6 mm: compaction: A... |
1112 1113 1114 |
"compact_migrate_scanned", "compact_free_scanned", "compact_isolated", |
fa25c503d mm: per-node vmst... |
1115 1116 1117 |
"compact_stall", "compact_fail", "compact_success", |
698b1b306 mm, compaction: i... |
1118 |
"compact_daemon_wake", |
7f354a548 mm, compaction: a... |
1119 1120 |
"compact_daemon_migrate_scanned", "compact_daemon_free_scanned", |
fa25c503d mm: per-node vmst... |
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 |
#endif #ifdef CONFIG_HUGETLB_PAGE "htlb_buddy_alloc_success", "htlb_buddy_alloc_fail", #endif "unevictable_pgs_culled", "unevictable_pgs_scanned", "unevictable_pgs_rescued", "unevictable_pgs_mlocked", "unevictable_pgs_munlocked", "unevictable_pgs_cleared", "unevictable_pgs_stranded", |
fa25c503d mm: per-node vmst... |
1134 1135 1136 1137 1138 1139 |
#ifdef CONFIG_TRANSPARENT_HUGEPAGE "thp_fault_alloc", "thp_fault_fallback", "thp_collapse_alloc", "thp_collapse_alloc_failed", |
95ecedcd6 thp, vmstats: add... |
1140 1141 |
"thp_file_alloc", "thp_file_mapped", |
122afea96 mm, vmstats: new ... |
1142 1143 |
"thp_split_page", "thp_split_page_failed", |
f9719a03d thp, vmstats: cou... |
1144 |
"thp_deferred_split_page", |
122afea96 mm, vmstats: new ... |
1145 |
"thp_split_pmd", |
ce9311cf9 mm/vmstats: add t... |
1146 1147 1148 |
#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD "thp_split_pud", #endif |
d8a8e1f0d thp, vmstat: impl... |
1149 1150 |
"thp_zero_page_alloc", "thp_zero_page_alloc_failed", |
225311a46 mm: test code to ... |
1151 |
"thp_swpout", |
fe490cc0f mm, THP, swap: ad... |
1152 |
"thp_swpout_fallback", |
fa25c503d mm: per-node vmst... |
1153 |
#endif |
09316c09d mm/balloon_compac... |
1154 1155 1156 1157 1158 1159 1160 |
#ifdef CONFIG_MEMORY_BALLOON "balloon_inflate", "balloon_deflate", #ifdef CONFIG_BALLOON_COMPACTION "balloon_migrate", #endif #endif /* CONFIG_MEMORY_BALLOON */ |
ec6599344 mm, x86: Account ... |
1161 |
#ifdef CONFIG_DEBUG_TLBFLUSH |
6df46865f mm: vmstats: trac... |
1162 |
#ifdef CONFIG_SMP |
9824cf975 mm: vmstats: tlb ... |
1163 1164 |
"nr_tlb_remote_flush", "nr_tlb_remote_flush_received", |
5178716b5 mm/vmstat.c: skip... |
1165 1166 1167 |
#else "", /* nr_tlb_remote_flush */ "", /* nr_tlb_remote_flush_received */ |
ec6599344 mm, x86: Account ... |
1168 |
#endif /* CONFIG_SMP */ |
9824cf975 mm: vmstats: tlb ... |
1169 1170 |
"nr_tlb_local_flush_all", "nr_tlb_local_flush_one", |
ec6599344 mm, x86: Account ... |
1171 |
#endif /* CONFIG_DEBUG_TLBFLUSH */ |
fa25c503d mm: per-node vmst... |
1172 |
|
4f115147f mm,vmacache: add ... |
1173 1174 1175 1176 |
#ifdef CONFIG_DEBUG_VM_VMACACHE "vmacache_find_calls", "vmacache_find_hits", #endif |
cbc65df24 mm, swap: add swa... |
1177 1178 1179 1180 |
#ifdef CONFIG_SWAP "swap_ra", "swap_ra_hit", #endif |
fa25c503d mm: per-node vmst... |
1181 1182 |
#endif /* CONFIG_VM_EVENTS_COUNTERS */ }; |
0d6617c77 numa: fix NUMA co... |
1183 |
#endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA */ |
fa25c503d mm: per-node vmst... |
1184 |
|
3c4868710 mm/vmstat.c: fix/... |
1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 |
#if (defined(CONFIG_DEBUG_FS) && defined(CONFIG_COMPACTION)) || \ defined(CONFIG_PROC_FS) static void *frag_start(struct seq_file *m, loff_t *pos) { pg_data_t *pgdat; loff_t node = *pos; for (pgdat = first_online_pgdat(); pgdat && node; pgdat = next_online_pgdat(pgdat)) --node; return pgdat; } static void *frag_next(struct seq_file *m, void *arg, loff_t *pos) { pg_data_t *pgdat = (pg_data_t *)arg; (*pos)++; return next_online_pgdat(pgdat); } static void frag_stop(struct seq_file *m, void *arg) { } |
b2bd85981 mm, vmstat: print... |
1211 1212 1213 1214 |
/* * Walk zones in a node and print using a callback. * If @assert_populated is true, only use callback for zones that are populated. */ |
3c4868710 mm/vmstat.c: fix/... |
1215 |
static void walk_zones_in_node(struct seq_file *m, pg_data_t *pgdat, |
727c080f0 mm: avoid taking ... |
1216 |
bool assert_populated, bool nolock, |
3c4868710 mm/vmstat.c: fix/... |
1217 1218 1219 1220 1221 1222 1223 |
void (*print)(struct seq_file *m, pg_data_t *, struct zone *)) { struct zone *zone; struct zone *node_zones = pgdat->node_zones; unsigned long flags; for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; ++zone) { |
b2bd85981 mm, vmstat: print... |
1224 |
if (assert_populated && !populated_zone(zone)) |
3c4868710 mm/vmstat.c: fix/... |
1225 |
continue; |
727c080f0 mm: avoid taking ... |
1226 1227 |
if (!nolock) spin_lock_irqsave(&zone->lock, flags); |
3c4868710 mm/vmstat.c: fix/... |
1228 |
print(m, pgdat, zone); |
727c080f0 mm: avoid taking ... |
1229 1230 |
if (!nolock) spin_unlock_irqrestore(&zone->lock, flags); |
3c4868710 mm/vmstat.c: fix/... |
1231 1232 1233 |
} } #endif |
d7a5752c0 mm: export unusab... |
1234 |
#ifdef CONFIG_PROC_FS |
467c996c1 Print out statist... |
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 |
static void frag_show_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) { int order; seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); for (order = 0; order < MAX_ORDER; ++order) seq_printf(m, "%6lu ", zone->free_area[order].nr_free); seq_putc(m, ' '); } /* * This walks the free areas for each zone. */ static int frag_show(struct seq_file *m, void *arg) { pg_data_t *pgdat = (pg_data_t *)arg; |
727c080f0 mm: avoid taking ... |
1253 |
walk_zones_in_node(m, pgdat, true, false, frag_show_print); |
467c996c1 Print out statist... |
1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 |
return 0; } static void pagetypeinfo_showfree_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) { int order, mtype; for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) { seq_printf(m, "Node %4d, zone %8s, type %12s ", pgdat->node_id, zone->name, migratetype_names[mtype]); for (order = 0; order < MAX_ORDER; ++order) { unsigned long freecount = 0; struct free_area *area; struct list_head *curr; area = &(zone->free_area[order]); list_for_each(curr, &area->free_list[mtype]) freecount++; seq_printf(m, "%6lu ", freecount); } |
f6ac2354d [PATCH] zoned vm ... |
1278 1279 1280 |
seq_putc(m, ' '); } |
467c996c1 Print out statist... |
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 |
} /* Print out the free pages at each order for each migatetype */ static int pagetypeinfo_showfree(struct seq_file *m, void *arg) { int order; pg_data_t *pgdat = (pg_data_t *)arg; /* Print header */ seq_printf(m, "%-43s ", "Free pages count per migrate type at order"); for (order = 0; order < MAX_ORDER; ++order) seq_printf(m, "%6d ", order); seq_putc(m, ' '); |
727c080f0 mm: avoid taking ... |
1295 |
walk_zones_in_node(m, pgdat, true, false, pagetypeinfo_showfree_print); |
467c996c1 Print out statist... |
1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 |
return 0; } static void pagetypeinfo_showblockcount_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) { int mtype; unsigned long pfn; unsigned long start_pfn = zone->zone_start_pfn; |
108bcc96e mm: add & use zon... |
1306 |
unsigned long end_pfn = zone_end_pfn(zone); |
467c996c1 Print out statist... |
1307 1308 1309 1310 |
unsigned long count[MIGRATE_TYPES] = { 0, }; for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) { struct page *page; |
d336e94e4 mm, vmstat: skip ... |
1311 1312 |
page = pfn_to_online_page(pfn); if (!page) |
467c996c1 Print out statist... |
1313 |
continue; |
eb33575cf [ARM] Double chec... |
1314 1315 |
/* Watch for unexpected holes punched in the memmap */ if (!memmap_valid_within(pfn, page, zone)) |
e80d6a248 [ARM] Skip memory... |
1316 |
continue; |
eb33575cf [ARM] Double chec... |
1317 |
|
a91c43c73 mm/vmstat: add zo... |
1318 1319 |
if (page_zone(page) != zone) continue; |
467c996c1 Print out statist... |
1320 |
mtype = get_pageblock_migratetype(page); |
e80d6a248 [ARM] Skip memory... |
1321 1322 |
if (mtype < MIGRATE_TYPES) count[mtype]++; |
467c996c1 Print out statist... |
1323 1324 1325 1326 1327 1328 1329 1330 1331 |
} /* Print counts */ seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) seq_printf(m, "%12lu ", count[mtype]); seq_putc(m, ' '); } |
f113e6412 mm/vmstat.c: fix ... |
1332 |
/* Print out the number of pageblocks for each migratetype */ |
467c996c1 Print out statist... |
1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 |
static int pagetypeinfo_showblockcount(struct seq_file *m, void *arg) { int mtype; pg_data_t *pgdat = (pg_data_t *)arg; seq_printf(m, " %-23s", "Number of blocks type "); for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) seq_printf(m, "%12s ", migratetype_names[mtype]); seq_putc(m, ' '); |
727c080f0 mm: avoid taking ... |
1344 1345 |
walk_zones_in_node(m, pgdat, true, false, pagetypeinfo_showblockcount_print); |
467c996c1 Print out statist... |
1346 1347 1348 |
return 0; } |
48c96a368 mm/page_owner: ke... |
1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 |
/* * Print out the number of pageblocks for each migratetype that contain pages * of other types. This gives an indication of how well fallbacks are being * contained by rmqueue_fallback(). It requires information from PAGE_OWNER * to determine what is going on */ static void pagetypeinfo_showmixedcount(struct seq_file *m, pg_data_t *pgdat) { #ifdef CONFIG_PAGE_OWNER int mtype; |
7dd80b8af mm, page_owner: c... |
1359 |
if (!static_branch_unlikely(&page_owner_inited)) |
48c96a368 mm/page_owner: ke... |
1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 |
return; drain_all_pages(NULL); seq_printf(m, " %-23s", "Number of mixed blocks "); for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) seq_printf(m, "%12s ", migratetype_names[mtype]); seq_putc(m, ' '); |
727c080f0 mm: avoid taking ... |
1370 1371 |
walk_zones_in_node(m, pgdat, true, true, pagetypeinfo_showmixedcount_print); |
48c96a368 mm/page_owner: ke... |
1372 1373 |
#endif /* CONFIG_PAGE_OWNER */ } |
467c996c1 Print out statist... |
1374 1375 1376 1377 1378 1379 1380 |
/* * This prints out statistics in relation to grouping pages by mobility. * It is expensive to collect so do not constantly read the file. */ static int pagetypeinfo_show(struct seq_file *m, void *arg) { pg_data_t *pgdat = (pg_data_t *)arg; |
41b25a378 /proc/pagetypeinf... |
1381 |
/* check memoryless node */ |
a47b53c5f vmstat: use N_MEM... |
1382 |
if (!node_state(pgdat->node_id, N_MEMORY)) |
41b25a378 /proc/pagetypeinf... |
1383 |
return 0; |
467c996c1 Print out statist... |
1384 1385 1386 1387 1388 1389 1390 1391 |
seq_printf(m, "Page block order: %d ", pageblock_order); seq_printf(m, "Pages per block: %lu ", pageblock_nr_pages); seq_putc(m, ' '); pagetypeinfo_showfree(m, pgdat); pagetypeinfo_showblockcount(m, pgdat); |
48c96a368 mm/page_owner: ke... |
1392 |
pagetypeinfo_showmixedcount(m, pgdat); |
467c996c1 Print out statist... |
1393 |
|
f6ac2354d [PATCH] zoned vm ... |
1394 1395 |
return 0; } |
8f32f7e5a proc: move /proc/... |
1396 |
static const struct seq_operations fragmentation_op = { |
f6ac2354d [PATCH] zoned vm ... |
1397 1398 1399 1400 1401 |
.start = frag_start, .next = frag_next, .stop = frag_stop, .show = frag_show, }; |
8f32f7e5a proc: move /proc/... |
1402 1403 1404 1405 |
static int fragmentation_open(struct inode *inode, struct file *file) { return seq_open(file, &fragmentation_op); } |
9d85e15f1 mm/vmstat.c: stan... |
1406 |
static const struct file_operations buddyinfo_file_operations = { |
8f32f7e5a proc: move /proc/... |
1407 1408 1409 1410 1411 |
.open = fragmentation_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
74e2e8e8c proc: move /proc/... |
1412 |
static const struct seq_operations pagetypeinfo_op = { |
467c996c1 Print out statist... |
1413 1414 1415 1416 1417 |
.start = frag_start, .next = frag_next, .stop = frag_stop, .show = pagetypeinfo_show, }; |
74e2e8e8c proc: move /proc/... |
1418 1419 1420 1421 |
static int pagetypeinfo_open(struct inode *inode, struct file *file) { return seq_open(file, &pagetypeinfo_op); } |
9d85e15f1 mm/vmstat.c: stan... |
1422 |
static const struct file_operations pagetypeinfo_file_operations = { |
74e2e8e8c proc: move /proc/... |
1423 1424 1425 1426 1427 |
.open = pagetypeinfo_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
e2ecc8a79 mm, vmstat: print... |
1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 |
static bool is_zone_first_populated(pg_data_t *pgdat, struct zone *zone) { int zid; for (zid = 0; zid < MAX_NR_ZONES; zid++) { struct zone *compare = &pgdat->node_zones[zid]; if (populated_zone(compare)) return zone == compare; } |
e2ecc8a79 mm, vmstat: print... |
1438 1439 |
return false; } |
467c996c1 Print out statist... |
1440 1441 |
static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) |
f6ac2354d [PATCH] zoned vm ... |
1442 |
{ |
467c996c1 Print out statist... |
1443 1444 |
int i; seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name); |
e2ecc8a79 mm, vmstat: print... |
1445 1446 1447 1448 1449 1450 |
if (is_zone_first_populated(pgdat, zone)) { seq_printf(m, " per-node stats"); for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) { seq_printf(m, " %-12s %lu", |
3a321d2a3 mm: change the ca... |
1451 1452 |
vmstat_text[i + NR_VM_ZONE_STAT_ITEMS + NR_VM_NUMA_STAT_ITEMS], |
e2ecc8a79 mm, vmstat: print... |
1453 1454 1455 |
node_page_state(pgdat, i)); } } |
467c996c1 Print out statist... |
1456 1457 1458 1459 1460 1461 1462 1463 1464 |
seq_printf(m, " pages free %lu" " min %lu" " low %lu" " high %lu" |
467c996c1 Print out statist... |
1465 1466 |
" spanned %lu" |
9feedc9d8 mm: introduce new... |
1467 1468 1469 1470 |
" present %lu" " managed %lu", |
88f5acf88 mm: page allocato... |
1471 |
zone_page_state(zone, NR_FREE_PAGES), |
418589663 page allocator: u... |
1472 1473 1474 |
min_wmark_pages(zone), low_wmark_pages(zone), high_wmark_pages(zone), |
467c996c1 Print out statist... |
1475 |
zone->spanned_pages, |
9feedc9d8 mm: introduce new... |
1476 1477 |
zone->present_pages, zone->managed_pages); |
467c996c1 Print out statist... |
1478 |
|
467c996c1 Print out statist... |
1479 |
seq_printf(m, |
3484b2de9 mm: rearrange zon... |
1480 1481 |
" protection: (%ld", |
467c996c1 Print out statist... |
1482 1483 |
zone->lowmem_reserve[0]); for (i = 1; i < ARRAY_SIZE(zone->lowmem_reserve); i++) |
3484b2de9 mm: rearrange zon... |
1484 |
seq_printf(m, ", %ld", zone->lowmem_reserve[i]); |
7dfb8bf3b mm, vmstat: suppr... |
1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 |
seq_putc(m, ')'); /* If unpopulated, no other information is useful */ if (!populated_zone(zone)) { seq_putc(m, ' '); return; } for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) seq_printf(m, " %-12s %lu", vmstat_text[i], zone_page_state(zone, i)); |
3a321d2a3 mm: change the ca... |
1498 1499 1500 1501 1502 |
#ifdef CONFIG_NUMA for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) seq_printf(m, " %-12s %lu", vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], |
638032224 mm: consider the ... |
1503 |
zone_numa_state_snapshot(zone, i)); |
3a321d2a3 mm: change the ca... |
1504 |
#endif |
7dfb8bf3b mm, vmstat: suppr... |
1505 1506 |
seq_printf(m, " pagesets"); |
467c996c1 Print out statist... |
1507 1508 |
for_each_online_cpu(i) { struct per_cpu_pageset *pageset; |
467c996c1 Print out statist... |
1509 |
|
99dcc3e5a this_cpu: Page al... |
1510 |
pageset = per_cpu_ptr(zone->pageset, i); |
3dfa5721f Page allocator: g... |
1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 |
seq_printf(m, " cpu: %i" " count: %i" " high: %i" " batch: %i", i, pageset->pcp.count, pageset->pcp.high, pageset->pcp.batch); |
df9ecaba3 [PATCH] ZVC: Scal... |
1524 |
#ifdef CONFIG_SMP |
467c996c1 Print out statist... |
1525 1526 1527 |
seq_printf(m, " vm stats threshold: %d", pageset->stat_threshold); |
df9ecaba3 [PATCH] ZVC: Scal... |
1528 |
#endif |
f6ac2354d [PATCH] zoned vm ... |
1529 |
} |
467c996c1 Print out statist... |
1530 |
seq_printf(m, |
599d0c954 mm, vmscan: move ... |
1531 1532 1533 1534 1535 1536 |
" node_unreclaimable: %u" " start_pfn: %lu" " node_inactive_ratio: %u", |
c73322d09 mm: fix 100% CPU ... |
1537 |
pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES, |
556adecba vmscan: second ch... |
1538 |
zone->zone_start_pfn, |
599d0c954 mm, vmscan: move ... |
1539 |
zone->zone_pgdat->inactive_ratio); |
467c996c1 Print out statist... |
1540 1541 1542 1543 1544 |
seq_putc(m, ' '); } /* |
b2bd85981 mm, vmstat: print... |
1545 1546 1547 1548 |
* Output information about zones in @pgdat. All zones are printed regardless * of whether they are populated or not: lowmem_reserve_ratio operates on the * set of all zones and userspace would not be aware of such zones if they are * suppressed here (zoneinfo displays the effect of lowmem_reserve_ratio). |
467c996c1 Print out statist... |
1549 1550 1551 1552 |
*/ static int zoneinfo_show(struct seq_file *m, void *arg) { pg_data_t *pgdat = (pg_data_t *)arg; |
727c080f0 mm: avoid taking ... |
1553 |
walk_zones_in_node(m, pgdat, false, false, zoneinfo_show_print); |
f6ac2354d [PATCH] zoned vm ... |
1554 1555 |
return 0; } |
5c9fe6281 proc: move /proc/... |
1556 |
static const struct seq_operations zoneinfo_op = { |
f6ac2354d [PATCH] zoned vm ... |
1557 1558 1559 1560 1561 1562 |
.start = frag_start, /* iterate over all zones. The same as in * fragmentation. */ .next = frag_next, .stop = frag_stop, .show = zoneinfo_show, }; |
5c9fe6281 proc: move /proc/... |
1563 1564 1565 1566 |
static int zoneinfo_open(struct inode *inode, struct file *file) { return seq_open(file, &zoneinfo_op); } |
9d85e15f1 mm/vmstat.c: stan... |
1567 |
static const struct file_operations zoneinfo_file_operations = { |
5c9fe6281 proc: move /proc/... |
1568 1569 1570 1571 1572 |
.open = zoneinfo_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
79da826ae writeback: report... |
1573 1574 1575 1576 1577 |
enum writeback_stat_item { NR_DIRTY_THRESHOLD, NR_DIRTY_BG_THRESHOLD, NR_VM_WRITEBACK_STAT_ITEMS, }; |
f6ac2354d [PATCH] zoned vm ... |
1578 1579 |
static void *vmstat_start(struct seq_file *m, loff_t *pos) { |
2244b95a7 [PATCH] zoned vm ... |
1580 |
unsigned long *v; |
79da826ae writeback: report... |
1581 |
int i, stat_items_size; |
f6ac2354d [PATCH] zoned vm ... |
1582 1583 1584 |
if (*pos >= ARRAY_SIZE(vmstat_text)) return NULL; |
79da826ae writeback: report... |
1585 |
stat_items_size = NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) + |
3a321d2a3 mm: change the ca... |
1586 |
NR_VM_NUMA_STAT_ITEMS * sizeof(unsigned long) + |
75ef71840 mm, vmstat: add i... |
1587 |
NR_VM_NODE_STAT_ITEMS * sizeof(unsigned long) + |
79da826ae writeback: report... |
1588 |
NR_VM_WRITEBACK_STAT_ITEMS * sizeof(unsigned long); |
f6ac2354d [PATCH] zoned vm ... |
1589 |
|
f8891e5e1 [PATCH] Light wei... |
1590 |
#ifdef CONFIG_VM_EVENT_COUNTERS |
79da826ae writeback: report... |
1591 |
stat_items_size += sizeof(struct vm_event_state); |
f8891e5e1 [PATCH] Light wei... |
1592 |
#endif |
79da826ae writeback: report... |
1593 1594 |
v = kmalloc(stat_items_size, GFP_KERNEL); |
2244b95a7 [PATCH] zoned vm ... |
1595 1596 |
m->private = v; if (!v) |
f6ac2354d [PATCH] zoned vm ... |
1597 |
return ERR_PTR(-ENOMEM); |
2244b95a7 [PATCH] zoned vm ... |
1598 |
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) |
c41f012ad mm: rename global... |
1599 |
v[i] = global_zone_page_state(i); |
79da826ae writeback: report... |
1600 |
v += NR_VM_ZONE_STAT_ITEMS; |
3a321d2a3 mm: change the ca... |
1601 1602 1603 1604 1605 |
#ifdef CONFIG_NUMA for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) v[i] = global_numa_state(i); v += NR_VM_NUMA_STAT_ITEMS; #endif |
75ef71840 mm, vmstat: add i... |
1606 1607 1608 |
for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) v[i] = global_node_page_state(i); v += NR_VM_NODE_STAT_ITEMS; |
79da826ae writeback: report... |
1609 1610 1611 |
global_dirty_limits(v + NR_DIRTY_BG_THRESHOLD, v + NR_DIRTY_THRESHOLD); v += NR_VM_WRITEBACK_STAT_ITEMS; |
f8891e5e1 [PATCH] Light wei... |
1612 |
#ifdef CONFIG_VM_EVENT_COUNTERS |
79da826ae writeback: report... |
1613 1614 1615 |
all_vm_events(v); v[PGPGIN] /= 2; /* sectors -> kbytes */ v[PGPGOUT] /= 2; |
f8891e5e1 [PATCH] Light wei... |
1616 |
#endif |
ff8b16d7e vmstat: fix offse... |
1617 |
return (unsigned long *)m->private + *pos; |
f6ac2354d [PATCH] zoned vm ... |
1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 |
} static void *vmstat_next(struct seq_file *m, void *arg, loff_t *pos) { (*pos)++; if (*pos >= ARRAY_SIZE(vmstat_text)) return NULL; return (unsigned long *)m->private + *pos; } static int vmstat_show(struct seq_file *m, void *arg) { unsigned long *l = arg; unsigned long off = l - (unsigned long *)m->private; |
68ba0326b proc: much faster... |
1632 |
|
d62b8ac8c mm: don't show nr... |
1633 1634 1635 |
/* Skip hidden vmstat items. */ if (*vmstat_text[off] == '\0') return 0; |
68ba0326b proc: much faster... |
1636 |
seq_puts(m, vmstat_text[off]); |
75ba1d07f seq/proc: modify ... |
1637 |
seq_put_decimal_ull(m, " ", *l); |
68ba0326b proc: much faster... |
1638 1639 |
seq_putc(m, ' '); |
f6ac2354d [PATCH] zoned vm ... |
1640 1641 1642 1643 1644 1645 1646 1647 |
return 0; } static void vmstat_stop(struct seq_file *m, void *arg) { kfree(m->private); m->private = NULL; } |
b6aa44ab6 proc: move /proc/... |
1648 |
static const struct seq_operations vmstat_op = { |
f6ac2354d [PATCH] zoned vm ... |
1649 1650 1651 1652 1653 |
.start = vmstat_start, .next = vmstat_next, .stop = vmstat_stop, .show = vmstat_show, }; |
b6aa44ab6 proc: move /proc/... |
1654 1655 1656 1657 |
static int vmstat_open(struct inode *inode, struct file *file) { return seq_open(file, &vmstat_op); } |
9d85e15f1 mm/vmstat.c: stan... |
1658 |
static const struct file_operations vmstat_file_operations = { |
b6aa44ab6 proc: move /proc/... |
1659 1660 1661 1662 1663 |
.open = vmstat_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
f6ac2354d [PATCH] zoned vm ... |
1664 |
#endif /* CONFIG_PROC_FS */ |
df9ecaba3 [PATCH] ZVC: Scal... |
1665 |
#ifdef CONFIG_SMP |
d1187ed21 vmstat: use our o... |
1666 |
static DEFINE_PER_CPU(struct delayed_work, vmstat_work); |
77461ab33 Make vm statistic... |
1667 |
int sysctl_stat_interval __read_mostly = HZ; |
d1187ed21 vmstat: use our o... |
1668 |
|
52b6f46bc mm: /proc/sys/vm/... |
1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 |
#ifdef CONFIG_PROC_FS static void refresh_vm_stats(struct work_struct *work) { refresh_cpu_vm_stats(true); } int vmstat_refresh(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { long val; int err; int i; /* * The regular update, every sysctl_stat_interval, may come later * than expected: leaving a significant amount in per_cpu buckets. * This is particularly misleading when checking a quantity of HUGE * pages, immediately after running a test. /proc/sys/vm/stat_refresh, * which can equally be echo'ed to or cat'ted from (by root), * can be used to update the stats just before reading them. * |
c41f012ad mm: rename global... |
1690 |
* Oh, and since global_zone_page_state() etc. are so careful to hide |
52b6f46bc mm: /proc/sys/vm/... |
1691 1692 1693 1694 1695 1696 1697 |
* transiently negative values, report an error here if any of * the stats is negative, so we know to go looking for imbalance. */ err = schedule_on_each_cpu(refresh_vm_stats); if (err) return err; for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) { |
75ef71840 mm, vmstat: add i... |
1698 |
val = atomic_long_read(&vm_zone_stat[i]); |
52b6f46bc mm: /proc/sys/vm/... |
1699 |
if (val < 0) { |
c822f6223 mm: delete NR_PAG... |
1700 1701 1702 1703 |
pr_warn("%s: %s %ld ", __func__, vmstat_text[i], val); err = -EINVAL; |
52b6f46bc mm: /proc/sys/vm/... |
1704 1705 |
} } |
3a321d2a3 mm: change the ca... |
1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 |
#ifdef CONFIG_NUMA for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) { val = atomic_long_read(&vm_numa_stat[i]); if (val < 0) { pr_warn("%s: %s %ld ", __func__, vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], val); err = -EINVAL; } } #endif |
52b6f46bc mm: /proc/sys/vm/... |
1717 1718 1719 1720 1721 1722 1723 1724 1725 |
if (err) return err; if (write) *ppos += *lenp; else *lenp = 0; return 0; } #endif /* CONFIG_PROC_FS */ |
d1187ed21 vmstat: use our o... |
1726 1727 |
static void vmstat_update(struct work_struct *w) { |
0eb77e988 vmstat: make vmst... |
1728 |
if (refresh_cpu_vm_stats(true)) { |
7cc36bbdd vmstat: on-demand... |
1729 1730 1731 1732 1733 |
/* * Counters were updated so we expect more updates * to occur in the future. Keep on running the * update worker thread. */ |
ce612879d mm: move pcp and ... |
1734 |
queue_delayed_work_on(smp_processor_id(), mm_percpu_wq, |
f01f17d37 mm, vmstat: make ... |
1735 1736 |
this_cpu_ptr(&vmstat_work), round_jiffies_relative(sysctl_stat_interval)); |
7cc36bbdd vmstat: on-demand... |
1737 1738 1739 1740 |
} } /* |
0eb77e988 vmstat: make vmst... |
1741 1742 1743 1744 |
* Switch off vmstat processing and then fold all the remaining differentials * until the diffs stay at zero. The function is used by NOHZ and can only be * invoked when tick processing is not active. */ |
0eb77e988 vmstat: make vmst... |
1745 |
/* |
7cc36bbdd vmstat: on-demand... |
1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 |
* Check if the diffs for a certain cpu indicate that * an update is needed. */ static bool need_update(int cpu) { struct zone *zone; for_each_populated_zone(zone) { struct per_cpu_pageset *p = per_cpu_ptr(zone->pageset, cpu); BUILD_BUG_ON(sizeof(p->vm_stat_diff[0]) != 1); |
3a321d2a3 mm: change the ca... |
1757 |
#ifdef CONFIG_NUMA |
1d90ca897 mm: update NUMA c... |
1758 |
BUILD_BUG_ON(sizeof(p->vm_numa_stat_diff[0]) != 2); |
3a321d2a3 mm: change the ca... |
1759 |
#endif |
638032224 mm: consider the ... |
1760 |
|
7cc36bbdd vmstat: on-demand... |
1761 1762 1763 1764 1765 1766 |
/* * The fast way of checking if there are any vmstat diffs. * This works because the diffs are byte sized items. */ if (memchr_inv(p->vm_stat_diff, 0, NR_VM_ZONE_STAT_ITEMS)) return true; |
3a321d2a3 mm: change the ca... |
1767 1768 1769 1770 |
#ifdef CONFIG_NUMA if (memchr_inv(p->vm_numa_stat_diff, 0, NR_VM_NUMA_STAT_ITEMS)) return true; #endif |
7cc36bbdd vmstat: on-demand... |
1771 1772 1773 |
} return false; } |
7b8da4c7f vmstat: get rid o... |
1774 1775 1776 1777 1778 |
/* * Switch off vmstat processing and then fold all the remaining differentials * until the diffs stay at zero. The function is used by NOHZ and can only be * invoked when tick processing is not active. */ |
f01f17d37 mm, vmstat: make ... |
1779 1780 1781 1782 |
void quiet_vmstat(void) { if (system_state != SYSTEM_RUNNING) return; |
7b8da4c7f vmstat: get rid o... |
1783 |
if (!delayed_work_pending(this_cpu_ptr(&vmstat_work))) |
f01f17d37 mm, vmstat: make ... |
1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 |
return; if (!need_update(smp_processor_id())) return; /* * Just refresh counters and do not care about the pending delayed * vmstat_update. It doesn't fire that often to matter and canceling * it would be too expensive from this path. * vmstat_shepherd will take care about that for us. */ refresh_cpu_vm_stats(false); } |
7cc36bbdd vmstat: on-demand... |
1797 1798 1799 1800 1801 1802 1803 |
/* * Shepherd worker thread that checks the * differentials of processors that have their worker * threads for vm statistics updates disabled because of * inactivity. */ static void vmstat_shepherd(struct work_struct *w); |
0eb77e988 vmstat: make vmst... |
1804 |
static DECLARE_DEFERRABLE_WORK(shepherd, vmstat_shepherd); |
7cc36bbdd vmstat: on-demand... |
1805 1806 1807 1808 1809 1810 1811 |
static void vmstat_shepherd(struct work_struct *w) { int cpu; get_online_cpus(); /* Check processors whose vmstat worker threads have been disabled */ |
7b8da4c7f vmstat: get rid o... |
1812 |
for_each_online_cpu(cpu) { |
f01f17d37 mm, vmstat: make ... |
1813 |
struct delayed_work *dw = &per_cpu(vmstat_work, cpu); |
7cc36bbdd vmstat: on-demand... |
1814 |
|
7b8da4c7f vmstat: get rid o... |
1815 |
if (!delayed_work_pending(dw) && need_update(cpu)) |
ce612879d mm: move pcp and ... |
1816 |
queue_delayed_work_on(cpu, mm_percpu_wq, dw, 0); |
f01f17d37 mm, vmstat: make ... |
1817 |
} |
7cc36bbdd vmstat: on-demand... |
1818 1819 1820 |
put_online_cpus(); schedule_delayed_work(&shepherd, |
98f4ebb29 mm: align vmstat_... |
1821 |
round_jiffies_relative(sysctl_stat_interval)); |
d1187ed21 vmstat: use our o... |
1822 |
} |
7cc36bbdd vmstat: on-demand... |
1823 |
static void __init start_shepherd_timer(void) |
d1187ed21 vmstat: use our o... |
1824 |
{ |
7cc36bbdd vmstat: on-demand... |
1825 1826 1827 |
int cpu; for_each_possible_cpu(cpu) |
ccde8bd40 vmstat: make vmst... |
1828 |
INIT_DEFERRABLE_WORK(per_cpu_ptr(&vmstat_work, cpu), |
7cc36bbdd vmstat: on-demand... |
1829 |
vmstat_update); |
7cc36bbdd vmstat: on-demand... |
1830 1831 |
schedule_delayed_work(&shepherd, round_jiffies_relative(sysctl_stat_interval)); |
d1187ed21 vmstat: use our o... |
1832 |
} |
03e86dba5 cpu: fix node sta... |
1833 1834 |
static void __init init_cpu_node_state(void) { |
4c501327b mm/vmstat: Avoid ... |
1835 |
int node; |
03e86dba5 cpu: fix node sta... |
1836 |
|
4c501327b mm/vmstat: Avoid ... |
1837 1838 1839 1840 |
for_each_online_node(node) { if (cpumask_weight(cpumask_of_node(node)) > 0) node_set_state(node, N_CPU); } |
03e86dba5 cpu: fix node sta... |
1841 |
} |
5438da977 mm/vmstat: Conver... |
1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 |
static int vmstat_cpu_online(unsigned int cpu) { refresh_zone_stat_thresholds(); node_set_state(cpu_to_node(cpu), N_CPU); return 0; } static int vmstat_cpu_down_prep(unsigned int cpu) { cancel_delayed_work_sync(&per_cpu(vmstat_work, cpu)); return 0; } static int vmstat_cpu_dead(unsigned int cpu) |
807a1bd2b mm: clear N_CPU f... |
1856 |
{ |
4c501327b mm/vmstat: Avoid ... |
1857 |
const struct cpumask *node_cpus; |
5438da977 mm/vmstat: Conver... |
1858 |
int node; |
807a1bd2b mm: clear N_CPU f... |
1859 |
|
5438da977 mm/vmstat: Conver... |
1860 1861 1862 |
node = cpu_to_node(cpu); refresh_zone_stat_thresholds(); |
4c501327b mm/vmstat: Avoid ... |
1863 1864 |
node_cpus = cpumask_of_node(node); if (cpumask_weight(node_cpus) > 0) |
5438da977 mm/vmstat: Conver... |
1865 |
return 0; |
807a1bd2b mm: clear N_CPU f... |
1866 1867 |
node_clear_state(node, N_CPU); |
5438da977 mm/vmstat: Conver... |
1868 |
return 0; |
807a1bd2b mm: clear N_CPU f... |
1869 |
} |
8f32f7e5a proc: move /proc/... |
1870 |
#endif |
df9ecaba3 [PATCH] ZVC: Scal... |
1871 |
|
ce612879d mm: move pcp and ... |
1872 |
struct workqueue_struct *mm_percpu_wq; |
597b7305d mm: move mm_percp... |
1873 |
void __init init_mm_internals(void) |
df9ecaba3 [PATCH] ZVC: Scal... |
1874 |
{ |
ce612879d mm: move pcp and ... |
1875 |
int ret __maybe_unused; |
5438da977 mm/vmstat: Conver... |
1876 |
|
80d136e13 mm: make mm_percp... |
1877 |
mm_percpu_wq = alloc_workqueue("mm_percpu_wq", WQ_MEM_RECLAIM, 0); |
ce612879d mm: move pcp and ... |
1878 1879 |
#ifdef CONFIG_SMP |
5438da977 mm/vmstat: Conver... |
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 |
ret = cpuhp_setup_state_nocalls(CPUHP_MM_VMSTAT_DEAD, "mm/vmstat:dead", NULL, vmstat_cpu_dead); if (ret < 0) pr_err("vmstat: failed to register 'dead' hotplug state "); ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "mm/vmstat:online", vmstat_cpu_online, vmstat_cpu_down_prep); if (ret < 0) pr_err("vmstat: failed to register 'online' hotplug state "); get_online_cpus(); |
03e86dba5 cpu: fix node sta... |
1894 |
init_cpu_node_state(); |
5438da977 mm/vmstat: Conver... |
1895 |
put_online_cpus(); |
d1187ed21 vmstat: use our o... |
1896 |
|
7cc36bbdd vmstat: on-demand... |
1897 |
start_shepherd_timer(); |
8f32f7e5a proc: move /proc/... |
1898 1899 |
#endif #ifdef CONFIG_PROC_FS |
9d85e15f1 mm/vmstat.c: stan... |
1900 1901 1902 1903 |
proc_create("buddyinfo", 0444, NULL, &buddyinfo_file_operations); proc_create("pagetypeinfo", 0444, NULL, &pagetypeinfo_file_operations); proc_create("vmstat", 0444, NULL, &vmstat_file_operations); proc_create("zoneinfo", 0444, NULL, &zoneinfo_file_operations); |
8f32f7e5a proc: move /proc/... |
1904 |
#endif |
df9ecaba3 [PATCH] ZVC: Scal... |
1905 |
} |
d7a5752c0 mm: export unusab... |
1906 1907 |
#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_COMPACTION) |
d7a5752c0 mm: export unusab... |
1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 |
/* * Return an index indicating how much of the available free memory is * unusable for an allocation of the requested size. */ static int unusable_free_index(unsigned int order, struct contig_page_info *info) { /* No free memory is interpreted as all free memory is unusable */ if (info->free_pages == 0) return 1000; /* * Index should be a value between 0 and 1. Return a value to 3 * decimal places. * * 0 => no fragmentation * 1 => high fragmentation */ return div_u64((info->free_pages - (info->free_blocks_suitable << order)) * 1000ULL, info->free_pages); } static void unusable_show_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) { unsigned int order; int index; struct contig_page_info info; seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); for (order = 0; order < MAX_ORDER; ++order) { fill_contig_page_info(zone, order, &info); index = unusable_free_index(order, &info); seq_printf(m, "%d.%03d ", index / 1000, index % 1000); } seq_putc(m, ' '); } /* * Display unusable free space index * * The unusable free space index measures how much of the available free * memory cannot be used to satisfy an allocation of a given size and is a * value between 0 and 1. The higher the value, the more of free memory is * unusable and by implication, the worse the external fragmentation is. This * can be expressed as a percentage by multiplying by 100. */ static int unusable_show(struct seq_file *m, void *arg) { pg_data_t *pgdat = (pg_data_t *)arg; /* check memoryless node */ |
a47b53c5f vmstat: use N_MEM... |
1965 |
if (!node_state(pgdat->node_id, N_MEMORY)) |
d7a5752c0 mm: export unusab... |
1966 |
return 0; |
727c080f0 mm: avoid taking ... |
1967 |
walk_zones_in_node(m, pgdat, true, false, unusable_show_print); |
d7a5752c0 mm: export unusab... |
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 |
return 0; } static const struct seq_operations unusable_op = { .start = frag_start, .next = frag_next, .stop = frag_stop, .show = unusable_show, }; static int unusable_open(struct inode *inode, struct file *file) { return seq_open(file, &unusable_op); } static const struct file_operations unusable_file_ops = { .open = unusable_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
f1a5ab121 mm: export fragme... |
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 |
static void extfrag_show_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) { unsigned int order; int index; /* Alloc on stack as interrupts are disabled for zone walk */ struct contig_page_info info; seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); for (order = 0; order < MAX_ORDER; ++order) { fill_contig_page_info(zone, order, &info); |
56de7263f mm: compaction: d... |
2004 |
index = __fragmentation_index(order, &info); |
f1a5ab121 mm: export fragme... |
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 |
seq_printf(m, "%d.%03d ", index / 1000, index % 1000); } seq_putc(m, ' '); } /* * Display fragmentation index for orders that allocations would fail for */ static int extfrag_show(struct seq_file *m, void *arg) { pg_data_t *pgdat = (pg_data_t *)arg; |
727c080f0 mm: avoid taking ... |
2018 |
walk_zones_in_node(m, pgdat, true, false, extfrag_show_print); |
f1a5ab121 mm: export fragme... |
2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 |
return 0; } static const struct seq_operations extfrag_op = { .start = frag_start, .next = frag_next, .stop = frag_stop, .show = extfrag_show, }; static int extfrag_open(struct inode *inode, struct file *file) { return seq_open(file, &extfrag_op); } static const struct file_operations extfrag_file_ops = { .open = extfrag_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
d7a5752c0 mm: export unusab... |
2041 2042 |
static int __init extfrag_debug_init(void) { |
bde8bd8a1 mm/vmstat.c: remo... |
2043 |
struct dentry *extfrag_debug_root; |
d7a5752c0 mm: export unusab... |
2044 2045 2046 2047 2048 2049 |
extfrag_debug_root = debugfs_create_dir("extfrag", NULL); if (!extfrag_debug_root) return -ENOMEM; if (!debugfs_create_file("unusable_index", 0444, extfrag_debug_root, NULL, &unusable_file_ops)) |
bde8bd8a1 mm/vmstat.c: remo... |
2050 |
goto fail; |
d7a5752c0 mm: export unusab... |
2051 |
|
f1a5ab121 mm: export fragme... |
2052 2053 |
if (!debugfs_create_file("extfrag_index", 0444, extfrag_debug_root, NULL, &extfrag_file_ops)) |
bde8bd8a1 mm/vmstat.c: remo... |
2054 |
goto fail; |
f1a5ab121 mm: export fragme... |
2055 |
|
d7a5752c0 mm: export unusab... |
2056 |
return 0; |
bde8bd8a1 mm/vmstat.c: remo... |
2057 2058 2059 |
fail: debugfs_remove_recursive(extfrag_debug_root); return -ENOMEM; |
d7a5752c0 mm: export unusab... |
2060 2061 2062 2063 |
} module_init(extfrag_debug_init); #endif |