linux-kernel - Re: [PATCH] Linux Kernel Markers

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Message-ID: <20060920180808.GI18646@redhat.com>
Date:	Wed, 20 Sep 2006 14:08:08 -0400
From:	"Frank Ch. Eigler" <fche@...hat.com>
To:	Karim Yaghmour <karim@...rsys.com>
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Martin Bligh <mbligh@...gle.com>, prasanna@...ibm.com,
	Andrew Morton <akpm@...l.org>,
	"Frank Ch. Eigler" <fche@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Paul Mundt <lethal@...ux-sh.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Jes Sorensen <jes@....com>, 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>, ltt-dev@...fik.org,
	systemtap@...rces.redhat.com, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] Linux Kernel Markers

Hi -

On Wed, Sep 20, 2006 at 01:21:52PM -0400, Karim Yaghmour wrote:

> [...]  IOW, we should be able to do what Martin suggests fairly
> easily (if we agree on a 5-byte "null" jump at the entry of
> functions of interest). Right? [...]

My interpretation of Martin's Monday proposal is that, if implemented,
we wouldn't need any of this nop/int3 stuff.  If function being
instrumented were recompiled on-the-fly, then it could sport plain &
direct C-level calls to the instrumentation handlers.

- FChE

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