proc: much faster /proc/vmstat

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

diff --git a/mm/vmstat.c b/mm/vmstat.c
index dc04e76..8857e0e 100644 (file)
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1513,7 +1513,10 @@ 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\n", vmstat_text[off], *l);
+
+       seq_puts(m, vmstat_text[off]);
+       seq_put_decimal_ull(m, ' ', *l);
+       seq_putc(m, '\n');
        return 0;
 }
 
@@ -1715,6 +1718,16 @@ static void __init start_shepherd_timer(void)
                round_jiffies_relative(sysctl_stat_interval));
 }
 
+static void __init init_cpu_node_state(void)
+{
+       int cpu;
+
+       get_online_cpus();
+       for_each_online_cpu(cpu)
+               node_set_state(cpu_to_node(cpu), N_CPU);
+       put_online_cpus();
+}
+
 static void vmstat_cpu_dead(int node)
 {
        int cpu;
@@ -1772,6 +1785,7 @@ static int __init setup_vmstat(void)
 #ifdef CONFIG_SMP
        cpu_notifier_register_begin();
        __register_cpu_notifier(&vmstat_notifier);
+       init_cpu_node_state();
 
        start_shepherd_timer();
        cpu_notifier_register_done();