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Subject: Re: [RFC][PATCH 2/2 v2] tracing: Only trace sched_wakeup if it
 actually work something up
From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
        Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Theodore Tso <tytso@mit.edu>, Arjan van de Ven <arjan@infradead.org>,
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Date: Wed, 08 Dec 2010 13:12:10 +0100
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On Thu, 2010-12-02 at 23:04 -0500, Steven Rostedt wrote:
> Currently the tracepoint sched_wakeup traces the wakeup event even
> if the wakeup failed to wake anything up. This is quite stupid
> but it happens because we did not want to add a conditional
> to the core kernel code that would just slow down the wakeup events.
> 
Its actually quite useful at times, so no, I don't much like this.