Make vm statistics update interval configurable

[deliverable/linux.git] / mm / vmstat.c

diff --git a/mm/vmstat.c b/mm/vmstat.c
index 9d824643a22f167800864a5f24b86645a25cfcdb..006eb7621869946141d7e159372d9661939f07a7 100644 (file)
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -641,11 +641,13 @@ const struct seq_operations vmstat_op = {
 
 #ifdef CONFIG_SMP
 static DEFINE_PER_CPU(struct delayed_work, vmstat_work);
+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), HZ);
+       schedule_delayed_work(&__get_cpu_var(vmstat_work),
+               sysctl_stat_interval);
 }
 
 static void __devinit start_cpu_timer(int cpu)