linux-kernel - Re: tracepoint maintainance models

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Message-ID: <20060918154707.GJ3951@redhat.com>
Date:	Mon, 18 Sep 2006 11:47:07 -0400
From:	"Frank Ch. Eigler" <fche@...hat.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Ingo Molnar <mingo@...e.hu>, "Frank Ch. Eigler" <fche@...hat.com>,
	Paul Mundt <lethal@...ux-sh.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Jes Sorensen <jes@....com>, Andrew Morton <akpm@...l.org>,
	Tom Zanussi <zanussi@...ibm.com>,
	Richard J Moore <richardj_moore@...ibm.com>,
	Michel Dagenais <michel.dagenais@...ymtl.ca>,
	Christoph Hellwig <hch@...radead.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	William Cohen <wcohen@...hat.com>,
	"Martin J. Bligh" <mbligh@...igh.org>
Subject: Re: tracepoint maintainance models

Hi -

alan wrote:

> I think your implementation is questionable if it causes any kind of
> jumps and conditions, even marked unlikely. Just put the needed data in
> a seperate section which can be used by the debugging tools. [...]
> No need to actually mess with the code for the usual cases.

Trouble is that it is specifically the *unusual* cases that need
compiler assistance via static markers, otherwise we'd manage with
just k/djprobes & debuginfo type efforts.

- FChE

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