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

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Message-ID: <20100802093606.GA13697@infradead.org>
Date:	Mon, 2 Aug 2010 05:36:06 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Christoph Hellwig <hch@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.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>,
	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,
	SystemTAP <systemtap@...rces.redhat.com>
Subject: Re: [PATCHv10 2.6.35-rc6-tip 9/14]  trace: uprobes trace_event
 interface

On Mon, Aug 02, 2010 at 06:29:27PM +0900, Masami Hiramatsu wrote:
> So, that could be a bug.
> 
> Anyway, at least kprobes has some sample modules under samples/kprobes/.
> Aren't they in-tree consumers of kprobes?

We have quite a few kprobes users in the kernel, just no really useful
modular ones.  We have a couple of useful users of jprobes, which are
the more useful kprobes variants in modules.  All of them might better
be converted to trace events, but those weren't around when they were
added.

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