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Date: Sat, 26 Oct 2013 14:35:36 +0200
From: Jiri Olsa <jolsa@redhat.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
        David Ahern <dsahern@gmail.com>, Namhyung Kim <namhyung@kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Paul Mackerras <paulus@samba.org>, Namhyung Kim <namhyung.kim@lge.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: RFP: Fixing "-ga -ag -g fp -g dwarf" was Re: [PATCHSET 0/8] perf
 tools: Fix scalability problem on callchain merging (v5)
Message-ID: <20131026123536.GA1069@krava.brq.redhat.com>
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On Sat, Oct 26, 2013 at 02:03:36PM +0200, Ingo Molnar wrote:
> 
> * Arnaldo Carvalho de Melo <acme@ghostprotocols.net> wrote:
> 
> > Em Fri, Oct 25, 2013 at 01:22:27PM -0600, David Ahern escreveu:
> > > On 10/25/13 1:09 PM, Arnaldo Carvalho de Melo wrote:
> > > >>>I think I did with the second follow up patch: -ga -ag -g fp -g
> > > >>>dwarf should all work properly with fp the default for -g.
> > 
> > > >>Acked-by: Ingo Molnar <mingo@kernel.org>
> > 
> > > >Can I have this one submitted?
> >  
> > > Upon further review, Jiri was correct: that patch handles some of
> > > the old cases fine, but did not handle others. ie., it just moved
> > > the bad syntax problem around.
> > 
> > perhaps we can do, at least for now, with what Ingo suggested?
> > 
> > Namely, having:
> > 
> > --call-graph   Require an argument, either "dwarf" or "fp"
> > -g             Doesn't require anything, uses whatever is configured,
> >                fp if no explicit config is done in places like
> >                ~/.perfconfig
> > 
> > Fits with what most people do usually, no?
> 
> Please do this! Usability sucks right now, going from '-g' to
> '-g <foo>' was an incompatible change, a regression I argue,
> which should be fixed in an urgent branch ASAP.

about to finish patches with that, will send it soon

jirka