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Date: Sun, 22 Feb 2009 12:38:22 +0900 (JST)
From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Jason Baron <jbaron@redhat.com>
Subject: Re: [PATCH] new irq tracer
Cc: kosaki.motohiro@jp.fujitsu.com, Peter Zijlstra <peterz@infradead.org>,
       "Frank Ch. Eigler" <fche@redhat.com>, mingo@elte.hu,
       rostedt@goodmis.org, linux-kernel@vger.kernel.org,
       acme@ghostprotocols.net, fweisbec@gmail.com, compudj@krystal.dyndns.org,
       Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
In-Reply-To: <20090220195236.GB3104@redhat.com>
References: <1234995035.4799.14.camel@laptop> <20090220195236.GB3104@redhat.com>
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>  /**
>   * handle_IRQ_event - irq action chain handler
>   * @irq:	the interrupt number
> @@ -354,7 +358,9 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
>  		local_irq_enable_in_hardirq();
>  
>  	do {
> +		trace_irq_entry(irq);
>  		ret = action->handler(irq, action->dev_id);
> +		trace_irq_exit(irq, ret);
>  		if (ret == IRQ_HANDLED)
>  			status |= action->flags;
>  		retval |= ret;

Nobdy want unnecessary redundant tracepoint.
Please discuss with mathieu, and merge his tracepoint.