[PATCH 2/3] NO_IDLE_HZ support patches - add_timer_on needs a check

[Srivatsa Vaddagiri <vatsa@in.ibm.com>]

add_timer_on needs to check if the target CPU was sleeping. If
so it should wakeup the CPU.

Patch below is against 2.6.14-rc1.


Signed-off-by : Srivatsa Vaddagiri <vatsa@in.ibm.com>

---

 linux-2.6.14-rc1-root/kernel/timer.c |    5 +++++
 1 files changed, 5 insertions(+)

diff -puN kernel/timer.c~add_timer_on kernel/timer.c
--- linux-2.6.14-rc1/kernel/timer.c~add_timer_on	2005-09-15 12:48:47.000000000 +0530
+++ linux-2.6.14-rc1-root/kernel/timer.c	2005-09-15 13:33:34.000000000 +0530
@@ -290,6 +290,11 @@ void add_timer_on(struct timer_list *tim
 	timer->base = &base->t_base;
 	internal_add_timer(base, timer);
 	spin_unlock_irqrestore(&base->t_base.lock, flags);
+#ifdef CONFIG_NO_IDLE_HZ
+	/* Wake up any sleeping CPU */
+	if (cpu_isset(cpu, nohz_cpu_mask))
+		smp_send_reschedule(cpu);
+#endif
 }
 
 

_
-- 


Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017
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