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-rw-r--r--mm/vmstat.c220
1 files changed, 165 insertions, 55 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index f600557a765..b37bd49bfd5 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -19,6 +19,9 @@
#include <linux/math64.h>
#include <linux/writeback.h>
#include <linux/compaction.h>
+#include <linux/mm_inline.h>
+
+#include "internal.h"
#ifdef CONFIG_VM_EVENT_COUNTERS
DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}};
@@ -52,7 +55,6 @@ void all_vm_events(unsigned long *ret)
}
EXPORT_SYMBOL_GPL(all_vm_events);
-#ifdef CONFIG_HOTPLUG
/*
* Fold the foreign cpu events into our own.
*
@@ -69,7 +71,6 @@ void vm_events_fold_cpu(int cpu)
fold_state->event[i] = 0;
}
}
-#endif /* CONFIG_HOTPLUG */
#endif /* CONFIG_VM_EVENT_COUNTERS */
@@ -142,7 +143,7 @@ int calculate_normal_threshold(struct zone *zone)
* 125 1024 10 16-32 GB 9
*/
- mem = zone->present_pages >> (27 - PAGE_SHIFT);
+ mem = zone->managed_pages >> (27 - PAGE_SHIFT);
threshold = 2 * fls(num_online_cpus()) * (1 + fls(mem));
@@ -206,7 +207,9 @@ void set_pgdat_percpu_threshold(pg_data_t *pgdat,
}
/*
- * For use when we know that interrupts are disabled.
+ * 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.
*/
void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
@@ -416,12 +419,17 @@ void dec_zone_page_state(struct page *page, enum zone_stat_item item)
EXPORT_SYMBOL(dec_zone_page_state);
#endif
+static inline void fold_diff(int *diff)
+{
+ int i;
+
+ for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
+ if (diff[i])
+ atomic_long_add(diff[i], &vm_stat[i]);
+}
+
/*
- * Update the zone counters for one cpu.
- *
- * The cpu specified must be either the current cpu or a processor that
- * is not online. If it is the current cpu then the execution thread must
- * be pinned to the current cpu.
+ * Update the zone counters for the current cpu.
*
* Note that refresh_cpu_vm_stats strives to only access
* node local memory. The per cpu pagesets on remote zones are placed
@@ -434,33 +442,29 @@ EXPORT_SYMBOL(dec_zone_page_state);
* with the global counters. These could cause remote node cache line
* bouncing and will have to be only done when necessary.
*/
-void refresh_cpu_vm_stats(int cpu)
+static void refresh_cpu_vm_stats(void)
{
struct zone *zone;
int i;
int global_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, };
for_each_populated_zone(zone) {
- struct per_cpu_pageset *p;
+ struct per_cpu_pageset __percpu *p = zone->pageset;
- p = per_cpu_ptr(zone->pageset, cpu);
+ for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) {
+ int v;
- for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
- if (p->vm_stat_diff[i]) {
- unsigned long flags;
- int v;
+ v = this_cpu_xchg(p->vm_stat_diff[i], 0);
+ if (v) {
- local_irq_save(flags);
- v = p->vm_stat_diff[i];
- p->vm_stat_diff[i] = 0;
- local_irq_restore(flags);
atomic_long_add(v, &zone->vm_stat[i]);
global_diff[i] += v;
#ifdef CONFIG_NUMA
/* 3 seconds idle till flush */
- p->expire = 3;
+ __this_cpu_write(p->expire, 3);
#endif
}
+ }
cond_resched();
#ifdef CONFIG_NUMA
/*
@@ -470,31 +474,75 @@ void refresh_cpu_vm_stats(int cpu)
* Check if there are pages remaining in this pageset
* if not then there is nothing to expire.
*/
- if (!p->expire || !p->pcp.count)
+ if (!__this_cpu_read(p->expire) ||
+ !__this_cpu_read(p->pcp.count))
continue;
/*
* We never drain zones local to this processor.
*/
if (zone_to_nid(zone) == numa_node_id()) {
- p->expire = 0;
+ __this_cpu_write(p->expire, 0);
continue;
}
- p->expire--;
- if (p->expire)
+
+ if (__this_cpu_dec_return(p->expire))
continue;
- if (p->pcp.count)
- drain_zone_pages(zone, &p->pcp);
+ if (__this_cpu_read(p->pcp.count))
+ drain_zone_pages(zone, this_cpu_ptr(&p->pcp));
#endif
}
+ fold_diff(global_diff);
+}
- for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
- if (global_diff[i])
- atomic_long_add(global_diff[i], &vm_stat[i]);
+/*
+ * 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;
+ }
+ }
+
+ fold_diff(global_diff);
}
+/*
+ * this is only called if !populated_zone(zone), which implies no other users of
+ * pset->vm_stat_diff[] exsist.
+ */
+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]);
+ }
+}
#endif
#ifdef CONFIG_NUMA
@@ -613,7 +661,12 @@ static char * const migratetype_names[MIGRATE_TYPES] = {
"Reclaimable",
"Movable",
"Reserve",
+#ifdef CONFIG_CMA
+ "CMA",
+#endif
+#ifdef CONFIG_MEMORY_ISOLATION
"Isolate",
+#endif
};
static void *frag_start(struct seq_file *m, loff_t *pos)
@@ -684,6 +737,7 @@ static void walk_zones_in_node(struct seq_file *m, pg_data_t *pgdat,
const char * const vmstat_text[] = {
/* Zoned VM counters */
"nr_free_pages",
+ "nr_alloc_batch",
"nr_inactive_anon",
"nr_active_anon",
"nr_inactive_file",
@@ -718,7 +772,11 @@ const char * const vmstat_text[] = {
"numa_local",
"numa_other",
#endif
+ "workingset_refault",
+ "workingset_activate",
+ "workingset_nodereclaim",
"nr_anon_transparent_hugepages",
+ "nr_free_cma",
"nr_dirty_threshold",
"nr_dirty_background_threshold",
@@ -738,29 +796,43 @@ const char * const vmstat_text[] = {
"pgmajfault",
TEXTS_FOR_ZONES("pgrefill")
- TEXTS_FOR_ZONES("pgsteal")
+ TEXTS_FOR_ZONES("pgsteal_kswapd")
+ TEXTS_FOR_ZONES("pgsteal_direct")
TEXTS_FOR_ZONES("pgscan_kswapd")
TEXTS_FOR_ZONES("pgscan_direct")
+ "pgscan_direct_throttle",
#ifdef CONFIG_NUMA
"zone_reclaim_failed",
#endif
"pginodesteal",
"slabs_scanned",
- "kswapd_steal",
"kswapd_inodesteal",
"kswapd_low_wmark_hit_quickly",
"kswapd_high_wmark_hit_quickly",
- "kswapd_skip_congestion_wait",
"pageoutrun",
"allocstall",
"pgrotated",
+ "drop_pagecache",
+ "drop_slab",
+
+#ifdef CONFIG_NUMA_BALANCING
+ "numa_pte_updates",
+ "numa_huge_pte_updates",
+ "numa_hint_faults",
+ "numa_hint_faults_local",
+ "numa_pages_migrated",
+#endif
+#ifdef CONFIG_MIGRATION
+ "pgmigrate_success",
+ "pgmigrate_fail",
+#endif
#ifdef CONFIG_COMPACTION
- "compact_blocks_moved",
- "compact_pages_moved",
- "compact_pagemigrate_failed",
+ "compact_migrate_scanned",
+ "compact_free_scanned",
+ "compact_isolated",
"compact_stall",
"compact_fail",
"compact_success",
@@ -777,7 +849,6 @@ const char * const vmstat_text[] = {
"unevictable_pgs_munlocked",
"unevictable_pgs_cleared",
"unevictable_pgs_stranded",
- "unevictable_pgs_mlockfreed",
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
"thp_fault_alloc",
@@ -785,8 +856,22 @@ const char * const vmstat_text[] = {
"thp_collapse_alloc",
"thp_collapse_alloc_failed",
"thp_split",
+ "thp_zero_page_alloc",
+ "thp_zero_page_alloc_failed",
+#endif
+#ifdef CONFIG_DEBUG_TLBFLUSH
+#ifdef CONFIG_SMP
+ "nr_tlb_remote_flush",
+ "nr_tlb_remote_flush_received",
+#endif /* CONFIG_SMP */
+ "nr_tlb_local_flush_all",
+ "nr_tlb_local_flush_one",
+#endif /* CONFIG_DEBUG_TLBFLUSH */
+
+#ifdef CONFIG_DEBUG_VM_VMACACHE
+ "vmacache_find_calls",
+ "vmacache_find_hits",
#endif
-
#endif /* CONFIG_VM_EVENTS_COUNTERS */
};
#endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA */
@@ -862,7 +947,7 @@ static void pagetypeinfo_showblockcount_print(struct seq_file *m,
int mtype;
unsigned long pfn;
unsigned long start_pfn = zone->zone_start_pfn;
- unsigned long end_pfn = start_pfn + zone->spanned_pages;
+ unsigned long end_pfn = zone_end_pfn(zone);
unsigned long count[MIGRATE_TYPES] = { 0, };
for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) {
@@ -914,7 +999,7 @@ static int pagetypeinfo_show(struct seq_file *m, void *arg)
pg_data_t *pgdat = (pg_data_t *)arg;
/* check memoryless node */
- if (!node_state(pgdat->node_id, N_HIGH_MEMORY))
+ if (!node_state(pgdat->node_id, N_MEMORY))
return 0;
seq_printf(m, "Page block order: %d\n", pageblock_order);
@@ -976,14 +1061,16 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
"\n high %lu"
"\n scanned %lu"
"\n spanned %lu"
- "\n present %lu",
+ "\n present %lu"
+ "\n managed %lu",
zone_page_state(zone, NR_FREE_PAGES),
min_wmark_pages(zone),
low_wmark_pages(zone),
high_wmark_pages(zone),
zone->pages_scanned,
zone->spanned_pages,
- zone->present_pages);
+ zone->present_pages,
+ zone->managed_pages);
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
seq_printf(m, "\n %-12s %lu", vmstat_text[i],
@@ -1019,7 +1106,7 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
"\n all_unreclaimable: %u"
"\n start_pfn: %lu"
"\n inactive_ratio: %u",
- zone->all_unreclaimable,
+ !zone_reclaimable(zone),
zone->zone_start_pfn,
zone->inactive_ratio);
seq_putc(m, '\n');
@@ -1144,24 +1231,38 @@ int sysctl_stat_interval __read_mostly = HZ;
static void vmstat_update(struct work_struct *w)
{
- refresh_cpu_vm_stats(smp_processor_id());
- schedule_delayed_work(&__get_cpu_var(vmstat_work),
+ refresh_cpu_vm_stats();
+ schedule_delayed_work(this_cpu_ptr(&vmstat_work),
round_jiffies_relative(sysctl_stat_interval));
}
-static void __cpuinit start_cpu_timer(int cpu)
+static void start_cpu_timer(int cpu)
{
struct delayed_work *work = &per_cpu(vmstat_work, cpu);
- INIT_DELAYED_WORK_DEFERRABLE(work, vmstat_update);
+ INIT_DEFERRABLE_WORK(work, vmstat_update);
schedule_delayed_work_on(cpu, work, __round_jiffies_relative(HZ, cpu));
}
+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();
+}
+
/*
* Use the cpu notifier to insure that the thresholds are recalculated
* when necessary.
*/
-static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb,
+static int vmstat_cpuup_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
@@ -1186,6 +1287,7 @@ static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb,
case CPU_DEAD:
case CPU_DEAD_FROZEN:
refresh_zone_stat_thresholds();
+ vmstat_cpu_dead(cpu_to_node(cpu));
break;
default:
break;
@@ -1193,7 +1295,7 @@ static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb,
return NOTIFY_OK;
}
-static struct notifier_block __cpuinitdata vmstat_notifier =
+static struct notifier_block vmstat_notifier =
{ &vmstat_cpuup_callback, NULL, 0 };
#endif
@@ -1202,10 +1304,14 @@ static int __init setup_vmstat(void)
#ifdef CONFIG_SMP
int cpu;
- register_cpu_notifier(&vmstat_notifier);
+ cpu_notifier_register_begin();
+ __register_cpu_notifier(&vmstat_notifier);
- for_each_online_cpu(cpu)
+ for_each_online_cpu(cpu) {
start_cpu_timer(cpu);
+ node_set_state(cpu_to_node(cpu), N_CPU);
+ }
+ cpu_notifier_register_done();
#endif
#ifdef CONFIG_PROC_FS
proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
@@ -1220,7 +1326,6 @@ module_init(setup_vmstat)
#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_COMPACTION)
#include <linux/debugfs.h>
-static struct dentry *extfrag_debug_root;
/*
* Return an index indicating how much of the available free memory is
@@ -1277,7 +1382,7 @@ static int unusable_show(struct seq_file *m, void *arg)
pg_data_t *pgdat = (pg_data_t *)arg;
/* check memoryless node */
- if (!node_state(pgdat->node_id, N_HIGH_MEMORY))
+ if (!node_state(pgdat->node_id, N_MEMORY))
return 0;
walk_zones_in_node(m, pgdat, unusable_show_print);
@@ -1358,19 +1463,24 @@ static const struct file_operations extfrag_file_ops = {
static int __init extfrag_debug_init(void)
{
+ struct dentry *extfrag_debug_root;
+
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))
- return -ENOMEM;
+ goto fail;
if (!debugfs_create_file("extfrag_index", 0444,
extfrag_debug_root, NULL, &extfrag_file_ops))
- return -ENOMEM;
+ goto fail;
return 0;
+fail:
+ debugfs_remove_recursive(extfrag_debug_root);
+ return -ENOMEM;
}
module_init(extfrag_debug_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 22:44:35 +0000