linux-kernel - Re: [PATCHv10 2.6.35-rc6-tip 9/14] trace: uprobes trace

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Date:	Mon, 2 Aug 2010 04:00:32 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Randy Dunlap <rdunlap@...otime.net>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Mark Wielaard <mjw@...hat.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Naren A Devaiah <naren.devaiah@...ibm.com>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	2nddept-manager@....hitachi.co.jp
Subject: Re: [PATCHv10 2.6.35-rc6-tip 9/14]  trace: uprobes trace_event
 interface

On Mon, Aug 02, 2010 at 09:56:37AM +0200, Ingo Molnar wrote:
> > > Hmm, I disagree with it, because both Kprobes and Uprobes provides
> > > APIs for modules too.
> > 
> > I'm not sure there is a point in maintaining a leightweight version for out 
> > of tree code. These modules could just select kprobes/uprobes events as 
> > well.
> > 
> > As you prefer, that was just a suggestion to make it more simple.
> 
> The upstream policy always was that out of tree code does not exist as far as 
> the kernel is concerned. So it is wrong to make the kernel crappier while 
> helping out of tree code.

Indeed.  In addition to that the current version of uprobes does not
actually have any exported symbols.

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