linux-kernel - Re: [PATCH 17/52] perf evlist: Add perf_evlist__set_tracking

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Message-ID: <53CF5559.8050908@intel.com>
Date:	Wed, 23 Jul 2014 09:25:29 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Jiri Olsa <jolsa@...hat.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 07/22/2014 10:22 PM, Jiri Olsa wrote:
> 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?

Yes, I will look at doing that instead.

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