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Date:	Tue, 22 Jul 2014 21:22:06 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 17/52] perf evlist: Add perf_evlist__set_tracking_event()

On Tue, Jul 22, 2014 at 04:17:26PM +0300, Adrian Hunter wrote:

SNIP

>  }
> +
> +int perf_evlist__set_tracking_event(struct perf_evlist *evlist,
> +				    struct perf_evsel *tracking_evsel)
> +{
> +	struct perf_evsel *evsel;
> +
> +	if (tracking_evsel->idx == 0)
> +		return 0;
> +
> +	if (tracking_evsel->leader->nr_members > 1)
> +		return -EINVAL;
> +
> +	list_for_each_entry(evsel, &evlist->entries, node) {
> +		if (evsel->idx < tracking_evsel->idx)
> +			evsel->idx += 1;
> +	}
> +	tracking_evsel->idx = 0;
> +
> +	return 0;
> +}

wouldnt it be better to add evsel->is_tracking bool for this?

jirka
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