diff options
Diffstat (limited to 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 68 |
1 files changed, 48 insertions, 20 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index 7759941d4e77..cd2e42be7b68 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -17,19 +17,21 @@ #include <linux/vmstat.h> #include <linux/sched.h> #include <linux/math64.h> +#include <linux/writeback.h> +#include <linux/compaction.h> #ifdef CONFIG_VM_EVENT_COUNTERS DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}}; EXPORT_PER_CPU_SYMBOL(vm_event_states); -static void sum_vm_events(unsigned long *ret, const struct cpumask *cpumask) +static void sum_vm_events(unsigned long *ret) { int cpu; int i; memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long)); - for_each_cpu(cpu, cpumask) { + for_each_online_cpu(cpu) { struct vm_event_state *this = &per_cpu(vm_event_states, cpu); for (i = 0; i < NR_VM_EVENT_ITEMS; i++) @@ -45,7 +47,7 @@ static void sum_vm_events(unsigned long *ret, const struct cpumask *cpumask) void all_vm_events(unsigned long *ret) { get_online_cpus(); - sum_vm_events(ret, cpu_online_mask); + sum_vm_events(ret); put_online_cpus(); } EXPORT_SYMBOL_GPL(all_vm_events); @@ -138,11 +140,24 @@ static void refresh_zone_stat_thresholds(void) int threshold; for_each_populated_zone(zone) { + unsigned long max_drift, tolerate_drift; + threshold = calculate_threshold(zone); for_each_online_cpu(cpu) per_cpu_ptr(zone->pageset, cpu)->stat_threshold = threshold; + + /* + * 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; } } @@ -381,6 +396,7 @@ void zone_statistics(struct zone *preferred_zone, struct zone *z) #endif #ifdef CONFIG_COMPACTION + struct contig_page_info { unsigned long free_pages; unsigned long free_blocks_total; @@ -732,6 +748,11 @@ static const char * const vmstat_text[] = { "nr_isolated_anon", "nr_isolated_file", "nr_shmem", + "nr_dirtied", + "nr_written", + "nr_dirty_threshold", + "nr_dirty_background_threshold", + #ifdef CONFIG_NUMA "numa_hit", "numa_miss", @@ -813,7 +834,7 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, "\n scanned %lu" "\n spanned %lu" "\n present %lu", - zone_page_state(zone, NR_FREE_PAGES), + zone_nr_free_pages(zone), min_wmark_pages(zone), low_wmark_pages(zone), high_wmark_pages(zone), @@ -853,11 +874,9 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, } seq_printf(m, "\n all_unreclaimable: %u" - "\n prev_priority: %i" "\n start_pfn: %lu" "\n inactive_ratio: %u", zone->all_unreclaimable, - zone->prev_priority, zone->zone_start_pfn, zone->inactive_ratio); seq_putc(m, '\n'); @@ -893,36 +912,44 @@ static const struct file_operations proc_zoneinfo_file_operations = { .release = seq_release, }; +enum writeback_stat_item { + NR_DIRTY_THRESHOLD, + NR_DIRTY_BG_THRESHOLD, + NR_VM_WRITEBACK_STAT_ITEMS, +}; + static void *vmstat_start(struct seq_file *m, loff_t *pos) { unsigned long *v; -#ifdef CONFIG_VM_EVENT_COUNTERS - unsigned long *e; -#endif - int i; + int i, stat_items_size; if (*pos >= ARRAY_SIZE(vmstat_text)) return NULL; + stat_items_size = NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) + + NR_VM_WRITEBACK_STAT_ITEMS * sizeof(unsigned long); #ifdef CONFIG_VM_EVENT_COUNTERS - v = kmalloc(NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) - + sizeof(struct vm_event_state), GFP_KERNEL); -#else - v = kmalloc(NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long), - GFP_KERNEL); + stat_items_size += sizeof(struct vm_event_state); #endif + + v = kmalloc(stat_items_size, GFP_KERNEL); m->private = v; if (!v) return ERR_PTR(-ENOMEM); for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) v[i] = global_page_state(i); + v += NR_VM_ZONE_STAT_ITEMS; + + global_dirty_limits(v + NR_DIRTY_BG_THRESHOLD, + v + NR_DIRTY_THRESHOLD); + v += NR_VM_WRITEBACK_STAT_ITEMS; + #ifdef CONFIG_VM_EVENT_COUNTERS - e = v + NR_VM_ZONE_STAT_ITEMS; - all_vm_events(e); - e[PGPGIN] /= 2; /* sectors -> kbytes */ - e[PGPGOUT] /= 2; + all_vm_events(v); + v[PGPGIN] /= 2; /* sectors -> kbytes */ + v[PGPGOUT] /= 2; #endif - return v + *pos; + return m->private + *pos; } static void *vmstat_next(struct seq_file *m, void *arg, loff_t *pos) @@ -1000,6 +1027,7 @@ static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb, switch (action) { case CPU_ONLINE: case CPU_ONLINE_FROZEN: + refresh_zone_stat_thresholds(); start_cpu_timer(cpu); node_set_state(cpu_to_node(cpu), N_CPU); break; |