linux-kernel - Re: [PATCH v2 1/2] perf parse-event: Release cpu

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Date:   Thu, 17 Sep 2020 15:10:58 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH v2 1/2] perf parse-event: Release cpu_map if evsel alloc
 failed

On Thu, Sep 17, 2020 at 03:02:18PM +0900, Namhyung Kim wrote:
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/util/parse-events.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 667cbca1547a..176a51698a64 100644
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -360,8 +360,10 @@ __add_event(struct list_head *list, int *idx,
>  		event_attr_init(attr);
>  
>  	evsel = evsel__new_idx(attr, *idx);
> -	if (!evsel)
> +	if (!evsel) {
> +		perf_cpu_map__put(cpus);

if there's pmu defined, we don't we get on perf_cpu_map:

        struct perf_cpu_map *cpus = pmu ? pmu->cpus :
                               cpu_list ? perf_cpu_map__new(cpu_list) : NULL;

jirka

>  		return NULL;
> +	}
>  
>  	(*idx)++;
>  	evsel->core.cpus   = perf_cpu_map__get(cpus);
> -- 
> 2.28.0.618.gf4bc123cb7-goog
>