linux-kernel - Re: [PATCH -tip FIXED] ftrace: add nop tracer

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Message-ID: <20080919110449.GB30624@elte.hu>
Date:	Fri, 19 Sep 2008 13:04:49 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Frédéric Weisbecker <fweisbec@...il.com>
Cc:	Steven Noonan <steven@...inklabs.net>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -tip FIXED] ftrace: add nop tracer


* Frédéric Weisbecker <fweisbec@...il.com> wrote:

> It seems we have two "none" tracers now. Why not seeing this nop 
> tracer as an improvment of the current "none tracer" ?
> 
> As a result the none tracer contained in trace.c could be replaced by 
> this new one as the default tracer. And that's said, that will enable 
> trace_printk by default even when no tracer is selected by the user.
> 
> What do you think about it?

hmm ... good idea. There are some special properties of the none tracer 
(it inhibits trace output for example), and those should be discontinued 
i guess.

	Ingo
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