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mm/vmstat.c
41.3 KB
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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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#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_stat[NR_VM_ZONE_STAT_ITEMS] __cacheline_aligned_in_smp; |
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EXPORT_SYMBOL(vm_stat); #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 zone *zone; int cpu; int threshold; |
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for_each_populated_zone(zone) { |
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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) |
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per_cpu_ptr(zone->pageset, cpu)->stat_threshold = 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, int delta) { |
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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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* 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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|
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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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|
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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_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 __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_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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#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 */ static inline void mod_state(struct zone *zone, enum zone_stat_item item, int delta, int overstep_mode) { 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, int delta) { mod_state(zone, item, delta, 0); } EXPORT_SYMBOL(mod_zone_page_state); void inc_zone_state(struct zone *zone, enum zone_stat_item item) { mod_state(zone, item, 1, 1); } void inc_zone_page_state(struct page *page, enum zone_stat_item item) { mod_state(page_zone(page), item, 1, 1); } EXPORT_SYMBOL(inc_zone_page_state); void dec_zone_page_state(struct page *page, enum zone_stat_item item) { mod_state(page_zone(page), item, -1, -1); } EXPORT_SYMBOL(dec_zone_page_state); #else /* * Use interrupt disable to serialize counter updates */ void mod_zone_page_state(struct zone *zone, enum zone_stat_item item, int delta) { 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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void inc_zone_state(struct zone *zone, enum zone_stat_item item) { unsigned long flags; local_irq_save(flags); __inc_zone_state(zone, item); local_irq_restore(flags); } |
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void inc_zone_page_state(struct page *page, enum zone_stat_item item) { unsigned long flags; struct zone *zone; |
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zone = page_zone(page); local_irq_save(flags); |
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__inc_zone_state(zone, item); |
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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; |
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|
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local_irq_save(flags); |
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__dec_zone_page_state(page, item); |
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local_irq_restore(flags); } EXPORT_SYMBOL(dec_zone_page_state); |
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#endif |
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|
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/* * Fold a differential into the global counters. * Returns the number of counters updated. */ static int fold_diff(int *diff) |
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{ int i; |
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int changes = 0; |
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for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) |
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if (diff[i]) { |
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atomic_long_add(diff[i], &vm_stat[i]); |
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changes++; } return changes; |
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} |
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/* |
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* Update the zone counters for the current cpu. |
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* |
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* 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. |
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* * The function returns the number of global counters updated. |
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*/ |
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static int refresh_cpu_vm_stats(void) |
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{ struct zone *zone; int i; |
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int global_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, }; |
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int changes = 0; |
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for_each_populated_zone(zone) { |
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struct per_cpu_pageset __percpu *p = zone->pageset; |
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for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) { int v; |
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|
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v = this_cpu_xchg(p->vm_stat_diff[i], 0); if (v) { |
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atomic_long_add(v, &zone->vm_stat[i]); global_diff[i] += v; |
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#ifdef CONFIG_NUMA /* 3 seconds idle till flush */ |
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__this_cpu_write(p->expire, 3); |
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#endif |
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} |
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} |
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cond_resched(); |
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#ifdef CONFIG_NUMA /* * 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. */ |
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if (!__this_cpu_read(p->expire) || !__this_cpu_read(p->pcp.count)) |
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continue; /* * We never drain zones local to this processor. */ if (zone_to_nid(zone) == numa_node_id()) { |
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__this_cpu_write(p->expire, 0); |
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continue; } |
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if (__this_cpu_dec_return(p->expire)) |
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continue; |
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if (__this_cpu_read(p->pcp.count)) { |
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drain_zone_pages(zone, this_cpu_ptr(&p->pcp)); |
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changes++; } |
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#endif |
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} |
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changes += fold_diff(global_diff); return changes; |
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} |
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/* |
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* 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) { struct zone *zone; int i; int global_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, }; 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]); global_diff[i] += v; } } |
4edb0748b vmstat: create fo... |
526 |
fold_diff(global_diff); |
2bb921e52 vmstat: create se... |
527 528 529 |
} /* |
40f4b1ead mm/vmstat: add no... |
530 531 532 |
* this is only called if !populated_zone(zone), which implies no other users of * pset->vm_stat_diff[] exsist. */ |
5a8838138 memory-hotplug: f... |
533 534 535 536 537 538 539 540 541 542 543 544 |
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]); atomic_long_add(v, &vm_stat[i]); } } |
2244b95a7 [PATCH] zoned vm ... |
545 |
#endif |
ca889e6c4 [PATCH] Use Zoned... |
546 547 548 549 550 551 |
#ifdef CONFIG_NUMA /* * zonelist = the list of zones passed to the allocator * z = the zone from which the allocation occurred. * * Must be called with interrupts disabled. |
78afd5612 mm: add __GFP_OTH... |
552 553 554 555 |
* * When __GFP_OTHER_NODE is set assume the node of the preferred * zone is the local node. This is useful for daemons who allocate * memory on behalf of other processes. |
ca889e6c4 [PATCH] Use Zoned... |
556 |
*/ |
78afd5612 mm: add __GFP_OTH... |
557 |
void zone_statistics(struct zone *preferred_zone, struct zone *z, gfp_t flags) |
ca889e6c4 [PATCH] Use Zoned... |
558 |
{ |
18ea7e710 mm: remember what... |
559 |
if (z->zone_pgdat == preferred_zone->zone_pgdat) { |
ca889e6c4 [PATCH] Use Zoned... |
560 561 562 |
__inc_zone_state(z, NUMA_HIT); } else { __inc_zone_state(z, NUMA_MISS); |
18ea7e710 mm: remember what... |
563 |
__inc_zone_state(preferred_zone, NUMA_FOREIGN); |
ca889e6c4 [PATCH] Use Zoned... |
564 |
} |
78afd5612 mm: add __GFP_OTH... |
565 566 |
if (z->node == ((flags & __GFP_OTHER_NODE) ? preferred_zone->node : numa_node_id())) |
ca889e6c4 [PATCH] Use Zoned... |
567 568 569 570 |
__inc_zone_state(z, NUMA_LOCAL); else __inc_zone_state(z, NUMA_OTHER); } |
c2d42c16a mm/vmstat.c: unin... |
571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 |
/* * Determine the per node value of a stat item. */ unsigned long node_page_state(int node, enum zone_stat_item item) { struct zone *zones = NODE_DATA(node)->node_zones; return #ifdef CONFIG_ZONE_DMA zone_page_state(&zones[ZONE_DMA], item) + #endif #ifdef CONFIG_ZONE_DMA32 zone_page_state(&zones[ZONE_DMA32], item) + #endif #ifdef CONFIG_HIGHMEM zone_page_state(&zones[ZONE_HIGHMEM], item) + #endif zone_page_state(&zones[ZONE_NORMAL], item) + zone_page_state(&zones[ZONE_MOVABLE], item); } |
ca889e6c4 [PATCH] Use Zoned... |
592 |
#endif |
d7a5752c0 mm: export unusab... |
593 |
#ifdef CONFIG_COMPACTION |
36deb0be3 vmstat: include c... |
594 |
|
d7a5752c0 mm: export unusab... |
595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 |
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... |
635 636 637 638 639 640 641 642 |
/* * 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... |
643 |
static int __fragmentation_index(unsigned int order, struct contig_page_info *info) |
f1a5ab121 mm: export fragme... |
644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 |
{ unsigned long requested = 1UL << order; 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... |
662 663 664 665 666 667 668 669 670 |
/* 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... |
671 |
#endif |
0d6617c77 numa: fix NUMA co... |
672 |
#if defined(CONFIG_PROC_FS) || defined(CONFIG_SYSFS) || defined(CONFIG_NUMA) |
fa25c503d mm: per-node vmst... |
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 |
#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... |
695 |
/* enum zone_stat_item countes */ |
fa25c503d mm: per-node vmst... |
696 |
"nr_free_pages", |
81c0a2bb5 mm: page_alloc: f... |
697 |
"nr_alloc_batch", |
fa25c503d mm: per-node vmst... |
698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 |
"nr_inactive_anon", "nr_active_anon", "nr_inactive_file", "nr_active_file", "nr_unevictable", "nr_mlock", "nr_anon_pages", "nr_mapped", "nr_file_pages", "nr_dirty", "nr_writeback", "nr_slab_reclaimable", "nr_slab_unreclaimable", "nr_page_table_pages", "nr_kernel_stack", "nr_unstable", "nr_bounce", "nr_vmscan_write", |
49ea7eb65 mm: vmscan: immed... |
716 |
"nr_vmscan_immediate_reclaim", |
fa25c503d mm: per-node vmst... |
717 718 719 720 721 722 |
"nr_writeback_temp", "nr_isolated_anon", "nr_isolated_file", "nr_shmem", "nr_dirtied", "nr_written", |
0d5d823ab mm: move zone->pa... |
723 |
"nr_pages_scanned", |
fa25c503d mm: per-node vmst... |
724 725 726 727 728 729 730 731 732 |
#ifdef CONFIG_NUMA "numa_hit", "numa_miss", "numa_foreign", "numa_interleave", "numa_local", "numa_other", #endif |
a528910e1 mm: thrash detect... |
733 734 |
"workingset_refault", "workingset_activate", |
449dd6984 mm: keep page cac... |
735 |
"workingset_nodereclaim", |
fa25c503d mm: per-node vmst... |
736 |
"nr_anon_transparent_hugepages", |
d1ce749a0 cma: count free C... |
737 |
"nr_free_cma", |
09316c09d mm/balloon_compac... |
738 739 |
/* enum writeback_stat_item counters */ |
fa25c503d mm: per-node vmst... |
740 741 742 743 |
"nr_dirty_threshold", "nr_dirty_background_threshold", #ifdef CONFIG_VM_EVENT_COUNTERS |
09316c09d mm/balloon_compac... |
744 |
/* enum vm_event_item counters */ |
fa25c503d mm: per-node vmst... |
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 |
"pgpgin", "pgpgout", "pswpin", "pswpout", TEXTS_FOR_ZONES("pgalloc") "pgfree", "pgactivate", "pgdeactivate", "pgfault", "pgmajfault", TEXTS_FOR_ZONES("pgrefill") |
904249aa6 mm: fix up the vm... |
760 761 |
TEXTS_FOR_ZONES("pgsteal_kswapd") TEXTS_FOR_ZONES("pgsteal_direct") |
fa25c503d mm: per-node vmst... |
762 763 |
TEXTS_FOR_ZONES("pgscan_kswapd") TEXTS_FOR_ZONES("pgscan_direct") |
68243e76e mm: account for t... |
764 |
"pgscan_direct_throttle", |
fa25c503d mm: per-node vmst... |
765 766 767 768 769 770 |
#ifdef CONFIG_NUMA "zone_reclaim_failed", #endif "pginodesteal", "slabs_scanned", |
fa25c503d mm: per-node vmst... |
771 772 773 |
"kswapd_inodesteal", "kswapd_low_wmark_hit_quickly", "kswapd_high_wmark_hit_quickly", |
fa25c503d mm: per-node vmst... |
774 775 776 777 |
"pageoutrun", "allocstall", "pgrotated", |
5509a5d27 drop_caches: add ... |
778 779 |
"drop_pagecache", "drop_slab", |
03c5a6e16 mm: numa: Add pte... |
780 781 |
#ifdef CONFIG_NUMA_BALANCING "numa_pte_updates", |
72403b4a0 mm: numa: return ... |
782 |
"numa_huge_pte_updates", |
03c5a6e16 mm: numa: Add pte... |
783 784 785 786 |
"numa_hint_faults", "numa_hint_faults_local", "numa_pages_migrated", #endif |
5647bc293 mm: compaction: M... |
787 788 789 790 |
#ifdef CONFIG_MIGRATION "pgmigrate_success", "pgmigrate_fail", #endif |
fa25c503d mm: per-node vmst... |
791 |
#ifdef CONFIG_COMPACTION |
397487db6 mm: compaction: A... |
792 793 794 |
"compact_migrate_scanned", "compact_free_scanned", "compact_isolated", |
fa25c503d mm: per-node vmst... |
795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 |
"compact_stall", "compact_fail", "compact_success", #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... |
811 812 813 814 815 816 817 |
#ifdef CONFIG_TRANSPARENT_HUGEPAGE "thp_fault_alloc", "thp_fault_fallback", "thp_collapse_alloc", "thp_collapse_alloc_failed", "thp_split", |
d8a8e1f0d thp, vmstat: impl... |
818 819 |
"thp_zero_page_alloc", "thp_zero_page_alloc_failed", |
fa25c503d mm: per-node vmst... |
820 |
#endif |
09316c09d mm/balloon_compac... |
821 822 823 824 825 826 827 |
#ifdef CONFIG_MEMORY_BALLOON "balloon_inflate", "balloon_deflate", #ifdef CONFIG_BALLOON_COMPACTION "balloon_migrate", #endif #endif /* CONFIG_MEMORY_BALLOON */ |
ec6599344 mm, x86: Account ... |
828 |
#ifdef CONFIG_DEBUG_TLBFLUSH |
6df46865f mm: vmstats: trac... |
829 |
#ifdef CONFIG_SMP |
9824cf975 mm: vmstats: tlb ... |
830 831 |
"nr_tlb_remote_flush", "nr_tlb_remote_flush_received", |
ec6599344 mm, x86: Account ... |
832 |
#endif /* CONFIG_SMP */ |
9824cf975 mm: vmstats: tlb ... |
833 834 |
"nr_tlb_local_flush_all", "nr_tlb_local_flush_one", |
ec6599344 mm, x86: Account ... |
835 |
#endif /* CONFIG_DEBUG_TLBFLUSH */ |
fa25c503d mm: per-node vmst... |
836 |
|
4f115147f mm,vmacache: add ... |
837 838 839 |
#ifdef CONFIG_DEBUG_VM_VMACACHE "vmacache_find_calls", "vmacache_find_hits", |
f5f302e21 mm,vmacache: coun... |
840 |
"vmacache_full_flushes", |
4f115147f mm,vmacache: add ... |
841 |
#endif |
fa25c503d mm: per-node vmst... |
842 843 |
#endif /* CONFIG_VM_EVENTS_COUNTERS */ }; |
0d6617c77 numa: fix NUMA co... |
844 |
#endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA */ |
fa25c503d mm: per-node vmst... |
845 |
|
3c4868710 mm/vmstat.c: fix/... |
846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 |
#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) { } /* Walk all the zones in a node and print using a callback */ static void walk_zones_in_node(struct seq_file *m, pg_data_t *pgdat, 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) { if (!populated_zone(zone)) continue; spin_lock_irqsave(&zone->lock, flags); print(m, pgdat, zone); spin_unlock_irqrestore(&zone->lock, flags); } } #endif |
d7a5752c0 mm: export unusab... |
891 |
#ifdef CONFIG_PROC_FS |
3c4868710 mm/vmstat.c: fix/... |
892 893 |
static char * const migratetype_names[MIGRATE_TYPES] = { "Unmovable", |
3c4868710 mm/vmstat.c: fix/... |
894 |
"Movable", |
475a2f905 mm: fix swapped M... |
895 |
"Reclaimable", |
0aaa29a56 mm, page_alloc: r... |
896 |
"HighAtomic", |
3c4868710 mm/vmstat.c: fix/... |
897 898 899 900 901 902 903 |
#ifdef CONFIG_CMA "CMA", #endif #ifdef CONFIG_MEMORY_ISOLATION "Isolate", #endif }; |
467c996c1 Print out statist... |
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 |
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; walk_zones_in_node(m, pgdat, frag_show_print); 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 ... |
947 948 949 |
seq_putc(m, ' '); } |
467c996c1 Print out statist... |
950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 |
} /* 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, ' '); walk_zones_in_node(m, pgdat, pagetypeinfo_showfree_print); 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... |
976 |
unsigned long end_pfn = zone_end_pfn(zone); |
467c996c1 Print out statist... |
977 978 979 980 981 982 983 984 985 |
unsigned long count[MIGRATE_TYPES] = { 0, }; for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) { struct page *page; if (!pfn_valid(pfn)) continue; page = pfn_to_page(pfn); |
eb33575cf [ARM] Double chec... |
986 987 988 |
/* Watch for unexpected holes punched in the memmap */ if (!memmap_valid_within(pfn, page, zone)) |
e80d6a248 [ARM] Skip memory... |
989 |
continue; |
eb33575cf [ARM] Double chec... |
990 |
|
467c996c1 Print out statist... |
991 |
mtype = get_pageblock_migratetype(page); |
e80d6a248 [ARM] Skip memory... |
992 993 |
if (mtype < MIGRATE_TYPES) count[mtype]++; |
467c996c1 Print out statist... |
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 |
} /* 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, ' '); } /* Print out the free pages at each order for each migratetype */ 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, ' '); walk_zones_in_node(m, pgdat, pagetypeinfo_showblockcount_print); return 0; } |
48c96a368 mm/page_owner: ke... |
1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 |
#ifdef CONFIG_PAGE_OWNER static void pagetypeinfo_showmixedcount_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) { struct page *page; struct page_ext *page_ext; unsigned long pfn = zone->zone_start_pfn, block_end_pfn; unsigned long end_pfn = pfn + zone->spanned_pages; unsigned long count[MIGRATE_TYPES] = { 0, }; int pageblock_mt, page_mt; int i; /* Scan block by block. First and last block may be incomplete */ pfn = zone->zone_start_pfn; /* * Walk the zone in pageblock_nr_pages steps. If a page block spans * a zone boundary, it will be double counted between zones. This does * not matter as the mixed block count will still be correct */ for (; pfn < end_pfn; ) { if (!pfn_valid(pfn)) { pfn = ALIGN(pfn + 1, MAX_ORDER_NR_PAGES); continue; } block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages); block_end_pfn = min(block_end_pfn, end_pfn); page = pfn_to_page(pfn); pageblock_mt = get_pfnblock_migratetype(page, pfn); for (; pfn < block_end_pfn; pfn++) { if (!pfn_valid_within(pfn)) continue; page = pfn_to_page(pfn); if (PageBuddy(page)) { pfn += (1UL << page_order(page)) - 1; continue; } if (PageReserved(page)) continue; page_ext = lookup_page_ext(page); if (!test_bit(PAGE_EXT_OWNER, &page_ext->flags)) continue; page_mt = gfpflags_to_migratetype(page_ext->gfp_mask); if (pageblock_mt != page_mt) { if (is_migrate_cma(pageblock_mt)) count[MIGRATE_MOVABLE]++; else count[pageblock_mt]++; pfn = block_end_pfn; break; } pfn += (1UL << page_ext->order) - 1; } } /* Print counts */ seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); for (i = 0; i < MIGRATE_TYPES; i++) seq_printf(m, "%12lu ", count[i]); seq_putc(m, ' '); } #endif /* CONFIG_PAGE_OWNER */ /* * 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; if (!page_owner_inited) 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, ' '); walk_zones_in_node(m, pgdat, pagetypeinfo_showmixedcount_print); #endif /* CONFIG_PAGE_OWNER */ } |
467c996c1 Print out statist... |
1120 1121 1122 1123 1124 1125 1126 |
/* * 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... |
1127 |
/* check memoryless node */ |
a47b53c5f vmstat: use N_MEM... |
1128 |
if (!node_state(pgdat->node_id, N_MEMORY)) |
41b25a378 /proc/pagetypeinf... |
1129 |
return 0; |
467c996c1 Print out statist... |
1130 1131 1132 1133 1134 1135 1136 1137 |
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... |
1138 |
pagetypeinfo_showmixedcount(m, pgdat); |
467c996c1 Print out statist... |
1139 |
|
f6ac2354d [PATCH] zoned vm ... |
1140 1141 |
return 0; } |
8f32f7e5a proc: move /proc/... |
1142 |
static const struct seq_operations fragmentation_op = { |
f6ac2354d [PATCH] zoned vm ... |
1143 1144 1145 1146 1147 |
.start = frag_start, .next = frag_next, .stop = frag_stop, .show = frag_show, }; |
8f32f7e5a proc: move /proc/... |
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 |
static int fragmentation_open(struct inode *inode, struct file *file) { return seq_open(file, &fragmentation_op); } static const struct file_operations fragmentation_file_operations = { .open = fragmentation_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
74e2e8e8c proc: move /proc/... |
1159 |
static const struct seq_operations pagetypeinfo_op = { |
467c996c1 Print out statist... |
1160 1161 1162 1163 1164 |
.start = frag_start, .next = frag_next, .stop = frag_stop, .show = pagetypeinfo_show, }; |
74e2e8e8c proc: move /proc/... |
1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 |
static int pagetypeinfo_open(struct inode *inode, struct file *file) { return seq_open(file, &pagetypeinfo_op); } static const struct file_operations pagetypeinfo_file_ops = { .open = pagetypeinfo_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
467c996c1 Print out statist... |
1176 1177 |
static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) |
f6ac2354d [PATCH] zoned vm ... |
1178 |
{ |
467c996c1 Print out statist... |
1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 |
int i; seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name); seq_printf(m, " pages free %lu" " min %lu" " low %lu" " high %lu" |
08d9ae7cb vmscan: don't exp... |
1190 1191 |
" scanned %lu" |
467c996c1 Print out statist... |
1192 1193 |
" spanned %lu" |
9feedc9d8 mm: introduce new... |
1194 1195 1196 1197 |
" present %lu" " managed %lu", |
88f5acf88 mm: page allocato... |
1198 |
zone_page_state(zone, NR_FREE_PAGES), |
418589663 page allocator: u... |
1199 1200 1201 |
min_wmark_pages(zone), low_wmark_pages(zone), high_wmark_pages(zone), |
0d5d823ab mm: move zone->pa... |
1202 |
zone_page_state(zone, NR_PAGES_SCANNED), |
467c996c1 Print out statist... |
1203 |
zone->spanned_pages, |
9feedc9d8 mm: introduce new... |
1204 1205 |
zone->present_pages, zone->managed_pages); |
467c996c1 Print out statist... |
1206 1207 1208 1209 1210 1211 1212 |
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) seq_printf(m, " %-12s %lu", vmstat_text[i], zone_page_state(zone, i)); seq_printf(m, |
3484b2de9 mm: rearrange zon... |
1213 1214 |
" protection: (%ld", |
467c996c1 Print out statist... |
1215 1216 |
zone->lowmem_reserve[0]); for (i = 1; i < ARRAY_SIZE(zone->lowmem_reserve); i++) |
3484b2de9 mm: rearrange zon... |
1217 |
seq_printf(m, ", %ld", zone->lowmem_reserve[i]); |
467c996c1 Print out statist... |
1218 1219 1220 1221 1222 1223 |
seq_printf(m, ")" " pagesets"); for_each_online_cpu(i) { struct per_cpu_pageset *pageset; |
467c996c1 Print out statist... |
1224 |
|
99dcc3e5a this_cpu: Page al... |
1225 |
pageset = per_cpu_ptr(zone->pageset, i); |
3dfa5721f Page allocator: g... |
1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 |
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... |
1239 |
#ifdef CONFIG_SMP |
467c996c1 Print out statist... |
1240 1241 1242 |
seq_printf(m, " vm stats threshold: %d", pageset->stat_threshold); |
df9ecaba3 [PATCH] ZVC: Scal... |
1243 |
#endif |
f6ac2354d [PATCH] zoned vm ... |
1244 |
} |
467c996c1 Print out statist... |
1245 1246 1247 |
seq_printf(m, " all_unreclaimable: %u" |
556adecba vmscan: second ch... |
1248 1249 1250 1251 |
" start_pfn: %lu" " inactive_ratio: %u", |
6e543d578 mm: vmscan: fix d... |
1252 |
!zone_reclaimable(zone), |
556adecba vmscan: second ch... |
1253 1254 |
zone->zone_start_pfn, zone->inactive_ratio); |
467c996c1 Print out statist... |
1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 |
seq_putc(m, ' '); } /* * Output information about zones in @pgdat. */ static int zoneinfo_show(struct seq_file *m, void *arg) { pg_data_t *pgdat = (pg_data_t *)arg; walk_zones_in_node(m, pgdat, zoneinfo_show_print); |
f6ac2354d [PATCH] zoned vm ... |
1266 1267 |
return 0; } |
5c9fe6281 proc: move /proc/... |
1268 |
static const struct seq_operations zoneinfo_op = { |
f6ac2354d [PATCH] zoned vm ... |
1269 1270 1271 1272 1273 1274 |
.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/... |
1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 |
static int zoneinfo_open(struct inode *inode, struct file *file) { return seq_open(file, &zoneinfo_op); } static const struct file_operations proc_zoneinfo_file_operations = { .open = zoneinfo_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
79da826ae writeback: report... |
1286 1287 1288 1289 1290 |
enum writeback_stat_item { NR_DIRTY_THRESHOLD, NR_DIRTY_BG_THRESHOLD, NR_VM_WRITEBACK_STAT_ITEMS, }; |
f6ac2354d [PATCH] zoned vm ... |
1291 1292 |
static void *vmstat_start(struct seq_file *m, loff_t *pos) { |
2244b95a7 [PATCH] zoned vm ... |
1293 |
unsigned long *v; |
79da826ae writeback: report... |
1294 |
int i, stat_items_size; |
f6ac2354d [PATCH] zoned vm ... |
1295 1296 1297 |
if (*pos >= ARRAY_SIZE(vmstat_text)) return NULL; |
79da826ae writeback: report... |
1298 1299 |
stat_items_size = NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) + NR_VM_WRITEBACK_STAT_ITEMS * sizeof(unsigned long); |
f6ac2354d [PATCH] zoned vm ... |
1300 |
|
f8891e5e1 [PATCH] Light wei... |
1301 |
#ifdef CONFIG_VM_EVENT_COUNTERS |
79da826ae writeback: report... |
1302 |
stat_items_size += sizeof(struct vm_event_state); |
f8891e5e1 [PATCH] Light wei... |
1303 |
#endif |
79da826ae writeback: report... |
1304 1305 |
v = kmalloc(stat_items_size, GFP_KERNEL); |
2244b95a7 [PATCH] zoned vm ... |
1306 1307 |
m->private = v; if (!v) |
f6ac2354d [PATCH] zoned vm ... |
1308 |
return ERR_PTR(-ENOMEM); |
2244b95a7 [PATCH] zoned vm ... |
1309 1310 |
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) v[i] = global_page_state(i); |
79da826ae writeback: report... |
1311 1312 1313 1314 1315 |
v += NR_VM_ZONE_STAT_ITEMS; global_dirty_limits(v + NR_DIRTY_BG_THRESHOLD, v + NR_DIRTY_THRESHOLD); v += NR_VM_WRITEBACK_STAT_ITEMS; |
f8891e5e1 [PATCH] Light wei... |
1316 |
#ifdef CONFIG_VM_EVENT_COUNTERS |
79da826ae writeback: report... |
1317 1318 1319 |
all_vm_events(v); v[PGPGIN] /= 2; /* sectors -> kbytes */ v[PGPGOUT] /= 2; |
f8891e5e1 [PATCH] Light wei... |
1320 |
#endif |
ff8b16d7e vmstat: fix offse... |
1321 |
return (unsigned long *)m->private + *pos; |
f6ac2354d [PATCH] zoned vm ... |
1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 |
} 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; seq_printf(m, "%s %lu ", vmstat_text[off], *l); return 0; } static void vmstat_stop(struct seq_file *m, void *arg) { kfree(m->private); m->private = NULL; } |
b6aa44ab6 proc: move /proc/... |
1347 |
static const struct seq_operations vmstat_op = { |
f6ac2354d [PATCH] zoned vm ... |
1348 1349 1350 1351 1352 |
.start = vmstat_start, .next = vmstat_next, .stop = vmstat_stop, .show = vmstat_show, }; |
b6aa44ab6 proc: move /proc/... |
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 |
static int vmstat_open(struct inode *inode, struct file *file) { return seq_open(file, &vmstat_op); } static const struct file_operations proc_vmstat_file_operations = { .open = vmstat_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
f6ac2354d [PATCH] zoned vm ... |
1364 |
#endif /* CONFIG_PROC_FS */ |
df9ecaba3 [PATCH] ZVC: Scal... |
1365 |
#ifdef CONFIG_SMP |
373ccbe59 mm, vmstat: allow... |
1366 |
static struct workqueue_struct *vmstat_wq; |
d1187ed21 vmstat: use our o... |
1367 |
static DEFINE_PER_CPU(struct delayed_work, vmstat_work); |
77461ab33 Make vm statistic... |
1368 |
int sysctl_stat_interval __read_mostly = HZ; |
7cc36bbdd vmstat: on-demand... |
1369 |
static cpumask_var_t cpu_stat_off; |
d1187ed21 vmstat: use our o... |
1370 1371 1372 |
static void vmstat_update(struct work_struct *w) { |
176bed1de vmstat: explicitl... |
1373 |
if (refresh_cpu_vm_stats()) { |
7cc36bbdd vmstat: on-demand... |
1374 1375 1376 1377 1378 |
/* * Counters were updated so we expect more updates * to occur in the future. Keep on running the * update worker thread. */ |
373ccbe59 mm, vmstat: allow... |
1379 |
queue_delayed_work_on(smp_processor_id(), vmstat_wq, |
176bed1de vmstat: explicitl... |
1380 |
this_cpu_ptr(&vmstat_work), |
7cc36bbdd vmstat: on-demand... |
1381 |
round_jiffies_relative(sysctl_stat_interval)); |
176bed1de vmstat: explicitl... |
1382 |
} else { |
7cc36bbdd vmstat: on-demand... |
1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 |
/* * We did not update any counters so the app may be in * a mode where it does not cause counter updates. * We may be uselessly running vmstat_update. * Defer the checking for differentials to the * shepherd thread on a different processor. */ int r; /* * Shepherd work thread does not race since it never * changes the bit if its zero but the cpu * online / off line code may race if * worker threads are still allowed during * shutdown / startup. */ r = cpumask_test_and_set_cpu(smp_processor_id(), cpu_stat_off); VM_BUG_ON(r); } } /* * 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); /* * 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; } return false; } /* * 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); static DECLARE_DELAYED_WORK(shepherd, vmstat_shepherd); static void vmstat_shepherd(struct work_struct *w) { int cpu; get_online_cpus(); /* Check processors whose vmstat worker threads have been disabled */ for_each_cpu(cpu, cpu_stat_off) if (need_update(cpu) && cpumask_test_and_clear_cpu(cpu, cpu_stat_off)) |
373ccbe59 mm, vmstat: allow... |
1447 |
queue_delayed_work_on(cpu, vmstat_wq, |
57c2e36b6 vmstat: Reduce ti... |
1448 |
&per_cpu(vmstat_work, cpu), 0); |
7cc36bbdd vmstat: on-demand... |
1449 1450 1451 1452 |
put_online_cpus(); schedule_delayed_work(&shepherd, |
98f4ebb29 mm: align vmstat_... |
1453 |
round_jiffies_relative(sysctl_stat_interval)); |
7cc36bbdd vmstat: on-demand... |
1454 |
|
d1187ed21 vmstat: use our o... |
1455 |
} |
7cc36bbdd vmstat: on-demand... |
1456 |
static void __init start_shepherd_timer(void) |
d1187ed21 vmstat: use our o... |
1457 |
{ |
7cc36bbdd vmstat: on-demand... |
1458 1459 1460 |
int cpu; for_each_possible_cpu(cpu) |
ba4877b9c vmstat: do not us... |
1461 |
INIT_DELAYED_WORK(per_cpu_ptr(&vmstat_work, cpu), |
7cc36bbdd vmstat: on-demand... |
1462 1463 1464 1465 1466 |
vmstat_update); if (!alloc_cpumask_var(&cpu_stat_off, GFP_KERNEL)) BUG(); cpumask_copy(cpu_stat_off, cpu_online_mask); |
d1187ed21 vmstat: use our o... |
1467 |
|
7cc36bbdd vmstat: on-demand... |
1468 1469 |
schedule_delayed_work(&shepherd, round_jiffies_relative(sysctl_stat_interval)); |
d1187ed21 vmstat: use our o... |
1470 |
} |
807a1bd2b mm: clear N_CPU f... |
1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 |
static void vmstat_cpu_dead(int node) { int cpu; get_online_cpus(); for_each_online_cpu(cpu) if (cpu_to_node(cpu) == node) goto end; node_clear_state(node, N_CPU); end: put_online_cpus(); } |
df9ecaba3 [PATCH] ZVC: Scal... |
1484 1485 1486 1487 |
/* * Use the cpu notifier to insure that the thresholds are recalculated * when necessary. */ |
0db0628d9 kernel: delete __... |
1488 |
static int vmstat_cpuup_callback(struct notifier_block *nfb, |
df9ecaba3 [PATCH] ZVC: Scal... |
1489 1490 1491 |
unsigned long action, void *hcpu) { |
d1187ed21 vmstat: use our o... |
1492 |
long cpu = (long)hcpu; |
df9ecaba3 [PATCH] ZVC: Scal... |
1493 |
switch (action) { |
d1187ed21 vmstat: use our o... |
1494 1495 |
case CPU_ONLINE: case CPU_ONLINE_FROZEN: |
5ee28a447 vmstat: update zo... |
1496 |
refresh_zone_stat_thresholds(); |
ad596925e this_cpu: Remove ... |
1497 |
node_set_state(cpu_to_node(cpu), N_CPU); |
7cc36bbdd vmstat: on-demand... |
1498 |
cpumask_set_cpu(cpu, cpu_stat_off); |
d1187ed21 vmstat: use our o... |
1499 1500 1501 |
break; case CPU_DOWN_PREPARE: case CPU_DOWN_PREPARE_FROZEN: |
afe2c511f workqueue: conver... |
1502 |
cancel_delayed_work_sync(&per_cpu(vmstat_work, cpu)); |
7cc36bbdd vmstat: on-demand... |
1503 |
cpumask_clear_cpu(cpu, cpu_stat_off); |
d1187ed21 vmstat: use our o... |
1504 1505 1506 |
break; case CPU_DOWN_FAILED: case CPU_DOWN_FAILED_FROZEN: |
7cc36bbdd vmstat: on-demand... |
1507 |
cpumask_set_cpu(cpu, cpu_stat_off); |
d1187ed21 vmstat: use our o... |
1508 |
break; |
ce421c799 [PATCH] mm: clean... |
1509 |
case CPU_DEAD: |
8bb784428 Add suspend-relat... |
1510 |
case CPU_DEAD_FROZEN: |
ce421c799 [PATCH] mm: clean... |
1511 |
refresh_zone_stat_thresholds(); |
807a1bd2b mm: clear N_CPU f... |
1512 |
vmstat_cpu_dead(cpu_to_node(cpu)); |
ce421c799 [PATCH] mm: clean... |
1513 1514 1515 |
break; default: break; |
df9ecaba3 [PATCH] ZVC: Scal... |
1516 1517 1518 |
} return NOTIFY_OK; } |
0db0628d9 kernel: delete __... |
1519 |
static struct notifier_block vmstat_notifier = |
df9ecaba3 [PATCH] ZVC: Scal... |
1520 |
{ &vmstat_cpuup_callback, NULL, 0 }; |
8f32f7e5a proc: move /proc/... |
1521 |
#endif |
df9ecaba3 [PATCH] ZVC: Scal... |
1522 |
|
e2fc88d06 mm/vmstat.c: clea... |
1523 |
static int __init setup_vmstat(void) |
df9ecaba3 [PATCH] ZVC: Scal... |
1524 |
{ |
8f32f7e5a proc: move /proc/... |
1525 |
#ifdef CONFIG_SMP |
0be94bad0 mm, vmstat: Fix C... |
1526 1527 |
cpu_notifier_register_begin(); __register_cpu_notifier(&vmstat_notifier); |
d1187ed21 vmstat: use our o... |
1528 |
|
7cc36bbdd vmstat: on-demand... |
1529 |
start_shepherd_timer(); |
0be94bad0 mm, vmstat: Fix C... |
1530 |
cpu_notifier_register_done(); |
373ccbe59 mm, vmstat: allow... |
1531 |
vmstat_wq = alloc_workqueue("vmstat", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
8f32f7e5a proc: move /proc/... |
1532 1533 1534 |
#endif #ifdef CONFIG_PROC_FS proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations); |
74e2e8e8c proc: move /proc/... |
1535 |
proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops); |
b6aa44ab6 proc: move /proc/... |
1536 |
proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations); |
5c9fe6281 proc: move /proc/... |
1537 |
proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations); |
8f32f7e5a proc: move /proc/... |
1538 |
#endif |
df9ecaba3 [PATCH] ZVC: Scal... |
1539 1540 1541 |
return 0; } module_init(setup_vmstat) |
d7a5752c0 mm: export unusab... |
1542 1543 |
#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_COMPACTION) |
d7a5752c0 mm: export unusab... |
1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 |
/* * 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... |
1601 |
if (!node_state(pgdat->node_id, N_MEMORY)) |
d7a5752c0 mm: export unusab... |
1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 |
return 0; walk_zones_in_node(m, pgdat, unusable_show_print); 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... |
1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 |
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... |
1641 |
index = __fragmentation_index(order, &info); |
f1a5ab121 mm: export fragme... |
1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 |
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; walk_zones_in_node(m, pgdat, extfrag_show_print); 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... |
1679 1680 |
static int __init extfrag_debug_init(void) { |
bde8bd8a1 mm/vmstat.c: remo... |
1681 |
struct dentry *extfrag_debug_root; |
d7a5752c0 mm: export unusab... |
1682 1683 1684 1685 1686 1687 |
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... |
1688 |
goto fail; |
d7a5752c0 mm: export unusab... |
1689 |
|
f1a5ab121 mm: export fragme... |
1690 1691 |
if (!debugfs_create_file("extfrag_index", 0444, extfrag_debug_root, NULL, &extfrag_file_ops)) |
bde8bd8a1 mm/vmstat.c: remo... |
1692 |
goto fail; |
f1a5ab121 mm: export fragme... |
1693 |
|
d7a5752c0 mm: export unusab... |
1694 |
return 0; |
bde8bd8a1 mm/vmstat.c: remo... |
1695 1696 1697 |
fail: debugfs_remove_recursive(extfrag_debug_root); return -ENOMEM; |
d7a5752c0 mm: export unusab... |
1698 1699 1700 1701 |
} module_init(extfrag_debug_init); #endif |