linux-kernel - Re: [RFC PATCH 1/4] kmemtrace: Core implementation.

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Message-ID: <20080723012611.GB28486@redhat.com>
Date:	Tue, 22 Jul 2008 21:26:11 -0400
From:	"Frank Ch. Eigler" <fche@...hat.com>
To:	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Cc:	penberg@...helsinki.fi, cl@...ux-foundation.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	rdunlap@...otime.net, mpm@...enic.com
Subject: Re: [RFC PATCH 1/4] kmemtrace: Core implementation.

Hi -


On Wed, Jul 23, 2008 at 03:50:02AM +0300, Eduard - Gabriel Munteanu wrote:

> [...]  Sounds like a good idea, but I'd like to get rid of markers
> and use Mathieu Desnoyers' tracepoints instead. I'm just waiting for
> tracepoints to get closer to inclusion in mainline/-mm.

OK.

> It would be great if tracepoints completely replaced markers, so
> SystemTap would use those instead.

Raw tracepoints are problematic as they require a per-tracepoint C
function signature to be synthesized by the tool (or hard-coded in the
tool or elsewhere).  We haven't worked out how best do to this.  OTOH,
markers don't require such hard-coding, so are simpler for a general
tool to interface to.


> However, if tracepoints are not ready when kmemtrace is to be merged,
> I'll take your advice and mention markers and SystemTap.

Thanks either way - I'm glad you found an existing tracing mechanism
usable and didn't choose/need to invent your own.


- FChE
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