linux-kernel - Re: [PATCH][RFC] vsprintf: unify the format decoding layer for its 3 users

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Message-ID: <20090227082035.GD3609@elte.hu>
Date:	Fri, 27 Feb 2009 09:20:35 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH][RFC] vsprintf: unify the format decoding layer for its
	3 users


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Fri, 27 Feb 2009 07:19:37 +0100 Frederic Weisbecker <fweisbec@...il.com> wrote:
> 
> > An new optimization is making its way to ftrace. Its purpose 
> > is to make ftrace_printk() consuming less memory and be 
> > faster.
> > 
> > Written by Lai Jiangshan, the approach is to delay the 
> > formatting job from tracing time to output time. Currently, 
> > a call to ftrace_printk will format the whole string and 
> > insert it into the ring buffer.
> 
> It does that?  eek.

hm, did you expect something else from a printf based interface?

	Ingo
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