linux-kernel - Re: [PATCH 22/27] perf tools: Enable --children option by default

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Message-ID: <20140728192326.GS17793@alap3.anarazel.de>
Date:	Mon, 28 Jul 2014 21:23:26 +0200
From:	Andres Freund <andres@...razel.de>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Jiri Olsa <jolsa@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andi Kleen <andi@...stfloor.org>, Arun Sharma <asharma@...com>,
	Rodrigo Campos <rodrigo@...g.com.ar>,
	Don Zickus <dzickus@...hat.com>
Subject: Re: [PATCH 22/27] perf tools: Enable --children option by default

Hi,

On 2014-05-29 12:58:25 +0900, Namhyung Kim wrote:
> Now perf top and perf report will show children column by default if
> it has callchain information.
> 
> Requested-by: Ingo Molnar <mingo@...nel.org>
> Tested-by: Rodrigo Campos <rodrigo@...g.com.ar>
> Tested-by: Arun Sharma <asharma@...com>
> Acked-by: Jiri Olsa <jolsa@...hat.com>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>

Stupid question: Why? This breaks user's usage pattern in a rather
significant way because the new output is pretty much entirely useless
in many cases, especially for userland programs. I think the new option
is great, but why is it suddenly the default?

Greetings,

Andres Freund
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