linux-kernel - Re: [PATCH -tip tracing/kprobes 0/9] tracing/kprobes, perf: perf probe and kprobe-tracer bugfixes

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Date:	Tue, 20 Oct 2009 08:54:26 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Christoph Hellwig <hch@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>
Subject: Re: [PATCH -tip tracing/kprobes 0/9] tracing/kprobes, perf: perf
	probe and kprobe-tracer bugfixes


* Masami Hiramatsu <mhiramat@...hat.com> wrote:

> How about the following syntax?
> <adding>
> perf probe schedule
> perf probe --add schedule
> 
> <deleting>
> perf probe --del schedule
> perf probe --del all	/* delete all probepoints */
> 
> So, this doesn't symmetric, but provides simple way to add a probe.

agreed. For deletion, eventually this:

  perf probe --del "*"

should also work - as should other regexp (or glob) matches on a range 
of existing probes.

plus there should be a perf probe call to output all current probes as 
perf probe commands - so that it can be saved (and restored).

	Ingo
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