Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[linux-2.6] / kernel / time / tick-sched.c

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index beef7ccdf842f3cea9994c19b879baa06f3e94f5..825b4c00fe4436a1921d4f57a6cb6d9e37510d3d 100644 (file)
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -140,8 +140,6 @@ void tick_nohz_update_jiffies(void)
        if (!ts->tick_stopped)
                return;
 
-       touch_softlockup_watchdog();
-
        cpu_clear(cpu, nohz_cpu_mask);
        now = ktime_get();
        ts->idle_waketime = now;
@@ -149,6 +147,8 @@ void tick_nohz_update_jiffies(void)
        local_irq_save(flags);
        tick_do_update_jiffies64(now);
        local_irq_restore(flags);
+
+       touch_softlockup_watchdog();
 }
 
 void tick_nohz_stop_idle(int cpu)
@@ -195,7 +195,7 @@ u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time)
  * Called either from the idle loop or from irq_exit() when an idle period was
  * just interrupted by an interrupt which did not cause a reschedule.
  */
-void tick_nohz_stop_sched_tick(void)
+void tick_nohz_stop_sched_tick(int inidle)
 {
        unsigned long seq, last_jiffies, next_jiffies, delta_jiffies, flags;
        struct tick_sched *ts;
@@ -224,6 +224,11 @@ void tick_nohz_stop_sched_tick(void)
        if (unlikely(ts->nohz_mode == NOHZ_MODE_INACTIVE))
                goto end;
 
+       if (!inidle && !ts->inidle)
+               goto end;
+
+       ts->inidle = 1;
+
        if (need_resched())
                goto end;
 
@@ -373,11 +378,14 @@ void tick_nohz_restart_sched_tick(void)
        local_irq_disable();
        tick_nohz_stop_idle(cpu);
 
-       if (!ts->tick_stopped) {
+       if (!ts->inidle || !ts->tick_stopped) {
+               ts->inidle = 0;
                local_irq_enable();
                return;
        }
 
+       ts->inidle = 0;
+
        rcu_exit_nohz();
 
        /* Update jiffies first */