linux-kernel - Re: [PATCH 03/27] perf tools: Add reference counting for cpu

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Message-ID: <20150623215434.GA24969@krava.brq.redhat.com>
Date:	Tue, 23 Jun 2015 23:54:34 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Andi Kleen <ak@...ux.intel.com>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 03/27] perf tools: Add reference counting for cpu_map
 object

On Tue, Jun 23, 2015 at 06:06:45PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jun 23, 2015 at 12:36:04AM +0200, Jiri Olsa escreveu:
> > -void cpu_map__delete(struct cpu_map *map)
> > +static void cpu_map__delete(struct cpu_map *map)
> >  {
> > -	free(map);
> > +	if (map) {
> > +		WARN_ONCE(atomic_read(&map->refcnt) != 0,
> > +			  "cpu map refcnt disbalanced\n");
> 
> Have you used this to catch some bug or is this just some attempt at a
> proactive check? s/disbalanced/unbalanced/g

yep, proactive check

jirka
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