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Subject: Re: [PATCH v2 4/6] trace: Add tracepoints to reschedule interrupt
 handler
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Vaibhav Nagarnaik <vnagarnaik@google.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
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        linux-kernel@vger.kernel.org, x86@kernel.org
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Date: Thu, 28 Jul 2011 14:12:50 +0200
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On Wed, 2011-07-27 at 11:57 -0700, Vaibhav Nagarnaik wrote:
> @@ -2578,6 +2579,7 @@ static void sched_ttwu_pending(void)
>         struct rq *rq = this_rq();
>         struct task_struct *list = xchg(&rq->wake_list, NULL);
>  
> +       trace_reschedule_interrupt_entry(0);
>         if (!list)
>                 return;
>  
> @@ -2610,6 +2612,7 @@ void scheduler_ipi(void)
>         irq_enter();
>         sched_ttwu_do_pending(list);
>         irq_exit();
> +       trace_reschedule_interrupt_exit(0);
>  } 

That's just wrong..