linux-kernel - Re: Re: [PATCH -tip 2/3] perf-probe: Support dwarf on uprobe events

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Date:	Tue, 24 Dec 2013 10:03:27 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
	Oleg Nesterov <oleg@...hat.com>,
	"David A. Long" <dave.long@...aro.org>, systemtap@...rceware.org,
	yrl.pp-manager.tt@...achi.com, Namhyung Kim <namhyung@...nel.org>
Subject: Re: Re: [PATCH -tip  2/3] perf-probe: Support dwarf on uprobe
 events

(2013/12/23 23:34), Arnaldo Carvalho de Melo wrote:
> Em Mon, Dec 23, 2013 at 06:39:16AM +0900, Masami Hiramatsu escreveu:
>> (2013/12/21 3:01), Arnaldo Carvalho de Melo wrote:
>>> Em Fri, Dec 20, 2013 at 10:02:59AM +0000, Masami Hiramatsu escreveu:
>>>> Support dwarf(debuginfo) based operations for uprobe events.
>>>> With this change, perf probe can analyze debuginfo of user
>>>> application binary to set up new uprobe event.
>>>> This allows perf-probe --add/--line works with -x option.
>>>> (Actually, --vars has already accepted -x option)
>>>
>>> Can you provide an example?
>>>
>>
>> OK, here is the examples from 0/3. :)
> 
> Pleasn readnthis message:
> 
> http://lkml.kernel.org/r/20131218141125.GT21999@twins.programming.kicks-ass.net
> 
> It is unrelated to this code being discussed in this thread, but
> provides another request for having better patch descriptions and to
> have relevant discussion in the corresponding patch, not just on "0/N".

OK, I'll take care of it.

> 
>> Or, should I better put this into the patch description too?
> 
> Sure thing, please!

I see, I'll update it with the examples in the next version.

> 
>> For example)
>> - Shows the probe-able lines of the given function
> 
> The above line would be more clear as:
> 
> "The following command shows the probe-able lines of a given user space
>  function, something that so far was only available in the 'perf probe'
>  tool for kernel space functions:"

Thanks! :)


-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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