linux-kernel - Re: [PATCH 5/5] perf tools: Enhance parsing events tracepoint error output

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Date:	Fri, 11 Sep 2015 13:50:02 -0400
From:	Raphaël Beamonte <raphael.beamonte@...il.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Matt Fleming <matt@...eblueprint.co.uk>
Subject: Re: [PATCH 5/5] perf tools: Enhance parsing events tracepoint error output

2015-09-11 12:16 GMT-04:00 Jiri Olsa <jolsa@...hat.com>:
> On Sat, Sep 12, 2015 at 01:09:31AM +0900, Namhyung Kim wrote:
<SNIP>
>> has a problem - if tracefs is mounted under debugfs, the access mode
>> of debugfs also affects, so in this case I had to change it both for
>> debugfs and tracefs..
>
>
> hum, I wonder the error message needs to be that smart..
>
> jirka

Hmm... If tracefs is mounted under debugfs, wouldn't remounting
debugfs do the trick, as it was done before?
If so, why couldn't we just check the paths with a basic strcmp to
verify if tracefs starts by debugfs, and in that case offer to remount
debugfs, else offer to remount tracefs?
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