linux-kernel - Re: [PATCH tracing/kprobes v2 0/5] tracing/kprobes, perf: perf probe support take 2

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Message-ID: <y0mocolj3ht.fsf@fche.csb>
Date:	Mon, 05 Oct 2009 10:54:06 -0400
From:	fche@...hat.com (Frank Ch. Eigler)
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	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>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>
Subject: Re: [PATCH tracing/kprobes v2 0/5] tracing/kprobes, 	perf: perf probe support take 2

Masami Hiramatsu <mhiramat@...hat.com> writes:

> [...]
> These patches introduce 'perf probe' command and update kprobe-tracer. [...]
> Usage
> -----
>  perf probe [<options>] -P 'PROBEDEF' [-P 'PROBEDEF' ...]
> [...]
>     -k, --vmlinux <file>  vmlinux/module pathname
>     -r, --release <rel>   kernel release
> [...]

Can you outline a reason for the -r flag?  We use it in systemtap for
cross-compiling purposes, but I didn't think perf was interested in that.

- FChE
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