linux-kernel - Re: [PATCH 2/2] tracing/function-return-tracer: Call prepare_ftrace

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Message-ID: <20081112221623.GB6125@elte.hu>
Date:	Wed, 12 Nov 2008 23:16:23 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] tracing/function-return-tracer: Call
	prepare_ftrace_return by registers


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

> Impact: Optimize a bit the function return tracer
> 
> This patch changes the calling convention of prepare_ftrace_return
> to pass its arguments by register. This will optimize it a bit and
> prepare it to support dynamic tracing.
> 
> Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> ---
>  arch/x86/kernel/entry_32.S |    5 +----
>  arch/x86/kernel/ftrace.c   |    1 -
>  2 files changed, 1 insertions(+), 5 deletions(-)

applied	to tip/tracing/function-return-tracer, thanks Frederic!

btw., should we now rename it all to the function-cost tracer?

	Ingo
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