linux-kernel - Re: [PATCH -tip 0/8] perf-probe updates

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Message-ID: <20091211212900.GA13473@ghostprotocols.net>
Date:	Fri, 11 Dec 2009 19:29:00 -0200
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jim Keniston <jkenisto@...ibm.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Jason Baron <jbaron@...hat.com>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>
Subject: Re: [PATCH -tip 0/8] perf-probe updates

Em Fri, Dec 11, 2009 at 04:15:30PM -0500, Masami Hiramatsu escreveu:
> Arnaldo Carvalho de Melo wrote:
> > Em Wed, Dec 09, 2009 at 04:41:39PM -0500, Masami Hiramatsu escreveu:
> >> Masami Hiramatsu wrote:
> >>>> Here the failure was because the symbol does not exist.
> >>>
> >>> Yeah, so that's what I'm expecting to be implemented with below item :-)
> >>>
> >>>    - Symbol search by libelf/kallsyms
> >>>
> >>> I guess it will be done by using symbol.c.
> >>> (Actually, current
> >>
> >> Oops, I might miss something, forgot it.
> >> actually, current perf probe doesn't decode kallsyms/elf, it just depends on
> >> kprobe-tracer. And kprobe-tracer will return -EINVAL not only if the symbol
> >> was not found, but also other reasons.
> >>
> >> So, if we want to show below message, we need to decode elf or kallsyms.
> > 
> > Should be easy now with my latest patch :-)
> 
> Thanks! that's looks very useful for me!

Please let me know of any shortcomings you may find!

- Arnaldo
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