linux-kernel - Re: [ANNOUNCE] New utility: 'trace'

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Date:	Wed, 17 Nov 2010 14:53:49 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Darren Hart <dvhart@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Jason Baron <jbaron@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Christoph Hellwig <hch@....de>,
	Pekka Enberg <penberg@...nel.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [ANNOUNCE] New utility: 'trace'

On Wed, 2010-11-17 at 14:43 +0100, Frederic Weisbecker wrote:
> 
> > Yes, trace_printk() is a pure debug interface, solely meant for the edit
> > + reboot cycle.
> 
> So why prevent from making it even more handy?
> 
> 
> > If you want anything more than that we've got tracepoints. The rule up
> > until now has been to never merge a trace_printk() user.
> 
> Sure, that doesn't change the core idea of trace_prink(): none of them must
> be merged. That new event interface would just make private uses of trace_printk()
> more convenient. 

I don't get it, if you don't want it, why put it there in the first
place?

I've never found myself thinking, oh damn, I didn't want to see that
one!, only damn, I should have added more :-)
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