linux-kernel - Re: [PATCH 2/4] [PATCH 2/4] tracing: Create new TRACE_EVENT

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Date:	Fri, 20 Nov 2009 16:06:45 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	Christoph Hellwig <hch@....de>
Subject: Re: [PATCH 2/4] [PATCH 2/4] tracing: Create new TRACE_EVENT_TEMPLATE

Steven Rostedt wrote:
> From: Steven Rostedt <srostedt@...hat.com>
> 
> There are some places in the kernel that define several tracepoints and
> they are all identical besides the name. The code to enable, disable and
> record is created for every trace point even if most of the code is
> identical.
> 
> This patch adds TRACE_EVENT_TEMPLATE that lets the developer create
> a template TRACE_EVENT and create trace points with DEFINE_EVENT, which
> is based off of a given template. Each trace point used by this
> will share most of the code, and bring down the size of the kernel
> when there are several duplicate events.
> 

Great!

There are quite many places that this template can be used.

If you haven't planed to convert other TRACE_EVENTs, I'll take it.

More over, I'll cook another patch to annotate some functions as
__init, so shrink the kernel size further.

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