2.6.24.6

 kernel

diff --git a/kernel/timer.c b/kernel/timer.c
index 2a00c22..4ee4f89 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -453,10 +453,18 @@ void add_timer_on(struct timer_list *timer, int cpu)
    spin_lock_irqsave(&base->lock, flags);
    timer_set_base(timer, base);
    internal_add_timer(base, timer);
+   /*
+    * Check whether the other CPU is idle and needs to be
+    * triggered to reevaluate the timer wheel when nohz is
+    * active. We are protected against the other CPU fiddling
+    * with the timer by holding the timer base lock. This also
+    * makes sure that a CPU on the way to idle can not evaluate
+    * the timer wheel.
+    */
+   wake_up_idle_cpu(cpu);
    spin_unlock_irqrestore(&base->lock, flags);
 }
 
-
 /**
  * mod_timer - modify a timer's timeout
  * @timer: the timer to be modified