linux-kernel - Re: [PATCH 3/16] LTTng 0.6.36 for 2.6.18 : Linux Kernel Markers

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Message-ID: <20061129010631.GD8910@redhat.com>
Date:	Tue, 28 Nov 2006 20:06:31 -0500
From:	"Frank Ch. Eigler" <fche@...hat.com>
To:	Christoph Hellwig <hch@...radead.org>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	"Frank Ch. Eigler" <fche@...hat.com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...l.org>, Ingo Molnar <mingo@...hat.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tom Zanussi <zanussi@...ibm.com>,
	Karim Yaghmour <karim@...rsys.com>,
	Paul Mundt <lethal@...ux-sh.org>, Jes Sorensen <jes@....com>,
	Richard J Moore <richardj_moore@...ibm.com>,
	"Martin J. Bligh" <mbligh@...igh.org>,
	Michel Dagenais <michel.dagenais@...ymtl.ca>,
	Douglas Niehaus <niehaus@...s.ku.edu>, ltt-dev@...fik.org,
	systemtap@...rces.redhat.com
Subject: Re: [PATCH 3/16] LTTng 0.6.36 for 2.6.18 : Linux Kernel Markers

Hi -

On Tue, Nov 28, 2006 at 05:40:36AM +0000, Christoph Hellwig wrote:
> [...]
> > > Are you sure the license_gplok check is necessary here?  We should
> > > consider encouraging non-gpl module writers to instrument their code,
> > > to give users a slightly better chance of debugging problems.

> > [... the authors of clearcase] have the funny habit of
> > distributing their kernel modules as ".ko" files instead of
> > sending a proper ".o" and later link it against a wrapper.  The
> > result is, I must say, quite bad [...]  the structure is
> > corrupted.

> Please don't add hacks like that for non-GPL modules.  

Indeed, offline Matheiu elaborated on his problem, and it turns out
that good old modversions would have solved it.

> But neither should we export any tracing functionality for them.
> They're not the kind of people we want to help at all,

Making that sort of political decision is beyond my pay grade.  
I merely suggested its consideration.

> and Frank just shows once again that he should rather stay away from
> kernel stuff and keep on writing C++.

Now now, if you don't like my C++, wait till you see my Smalltalk-80.
Or are you just jealous that my initials subsume yours?

- FChE (this space for rent)
-
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