linux-kernel - Re: [RFC][PATCH 2/2 v2] tracing: Only trace sched

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Message-ID: <1291810330.28378.6.camel@laptop>
Date:	Wed, 08 Dec 2010 13:12:10 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Theodore Tso <tytso@....edu>,
	Arjan van de Ven <arjan@...radead.org>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>
Subject: Re: [RFC][PATCH 2/2 v2] tracing: Only trace sched_wakeup if it
 actually work something up

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.


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