diff options
Diffstat (limited to 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index 9a66dc4aed43..9d824643a22f 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -640,6 +640,22 @@ const struct seq_operations vmstat_op = { #endif /* CONFIG_PROC_FS */ #ifdef CONFIG_SMP +static DEFINE_PER_CPU(struct delayed_work, vmstat_work); + +static void vmstat_update(struct work_struct *w) +{ + refresh_cpu_vm_stats(smp_processor_id()); + schedule_delayed_work(&__get_cpu_var(vmstat_work), HZ); +} + +static void __devinit start_cpu_timer(int cpu) +{ + struct delayed_work *vmstat_work = &per_cpu(vmstat_work, cpu); + + INIT_DELAYED_WORK(vmstat_work, vmstat_update); + schedule_delayed_work_on(cpu, vmstat_work, HZ + cpu); +} + /* * Use the cpu notifier to insure that the thresholds are recalculated * when necessary. @@ -648,11 +664,22 @@ static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) { + long cpu = (long)hcpu; + switch (action) { - case CPU_UP_PREPARE: - case CPU_UP_PREPARE_FROZEN: - case CPU_UP_CANCELED: - case CPU_UP_CANCELED_FROZEN: + case CPU_ONLINE: + case CPU_ONLINE_FROZEN: + start_cpu_timer(cpu); + break; + case CPU_DOWN_PREPARE: + case CPU_DOWN_PREPARE_FROZEN: + cancel_rearming_delayed_work(&per_cpu(vmstat_work, cpu)); + per_cpu(vmstat_work, cpu).work.func = NULL; + break; + case CPU_DOWN_FAILED: + case CPU_DOWN_FAILED_FROZEN: + start_cpu_timer(cpu); + break; case CPU_DEAD: case CPU_DEAD_FROZEN: refresh_zone_stat_thresholds(); @@ -668,8 +695,13 @@ static struct notifier_block __cpuinitdata vmstat_notifier = int __init setup_vmstat(void) { + int cpu; + refresh_zone_stat_thresholds(); register_cpu_notifier(&vmstat_notifier); + + for_each_online_cpu(cpu) + start_cpu_timer(cpu); return 0; } module_init(setup_vmstat) |