linux-kernel - Re: [PATCH] tracing: add trace console

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Message-ID: <1321454493.27735.2.camel@twins>
Date:	Wed, 16 Nov 2011 15:41:33 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] tracing: add trace console

On Wed, 2011-11-16 at 15:30 +0100, Johannes Berg wrote:
> > > > +config TRACE_CONSOLE
> > > > +     tristate "Support for a tracing console"
> > > > +     help
> > > > +       Say M (or Y if you must, but this is not recommended) 
> > 
> > Why not?
> 
> It'll always be registered and you have no way to turn it off then, so
> you can't trace without getting every printk. I didn't want to add extra
> API to toggle it, but building it in might be a bit odd that way. 

OK, so maybe expand that help text a little to avoid the obvious
question ;-)
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