linux-kernel - Re: [PATCH] perf tools: Fixup for removing -f option in perf record

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Date:	Fri, 28 Jun 2013 11:47:38 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf tools: Fixup for removing -f option in perf record

On Thu, Jun 27, 2013 at 12:47:50PM +0200, Peter Zijlstra wrote:
> On Thu, Jun 27, 2013 at 12:39:31PM +0200, Ingo Molnar wrote:
> > 
> > * Peter Zijlstra <peterz@...radead.org> wrote:
> > 
> > > On Thu, Jun 27, 2013 at 01:25:20PM +0900, Namhyung Kim wrote:
> > > > From: Namhyung Kim <namhyung.kim@....com>
> > > > 
> > > > The commit bf3da4014a0c ("perf record: Remove -f/--force option") got
> > > > rid of -f option from perf record.  But this option was used
> > > > internally by various sub-commands so they wouldn't work anymore.
> > > > Also update the example document not to use -f option.
> > > 
> > > Oh man.. we got rid of -f? Do we now default to over-write existing data
> > > file?
> > 
> > I thought -f was the implied default for ages?
> 
> OK.. I've been dutifully typing it all this while :-)

The '-f' option in record command had no affect.. myabe it got
depreceated when we started to backup perf.data to perf.data.old..?

The report command bails out on following condition:

        if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {

jirka
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