linux-kernel - Re: [PATCH V7 6/8] perf,tools: Dump per-sample freq/CPU%/CORE

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Message-ID: <20150831111940.GI22039@krava.brq.redhat.com>
Date:	Mon, 31 Aug 2015 13:19:40 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Kan Liang <kan.liang@...el.com>
Cc:	acme@...nel.org, jolsa@...nel.org, a.p.zijlstra@...llo.nl,
	luto@...nel.org, mingo@...hat.com, eranian@...gle.com,
	ak@...ux.intel.com, mark.rutland@....com, adrian.hunter@...el.com,
	namhyung@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V7 6/8] perf,tools: Dump per-sample freq/CPU%/CORE_BUSY%
 in report -D

On Fri, Aug 28, 2015 at 05:48:07AM -0400, Kan Liang wrote:

SNIP

>  
>  static struct machine *machines__find_for_cpumode(struct machines *machines,
> @@ -1079,11 +1101,12 @@ static int machines__deliver_event(struct machines *machines,
>  
>  	switch (event->header.type) {
>  	case PERF_RECORD_SAMPLE:
> -		dump_sample(evsel, event, sample);
>  		if (evsel == NULL) {
>  			++evlist->stats.nr_unknown_id;
>  			return 0;
>  		}
> +		dump_sample(evsel, event, sample);
> +

could you submit this hunk separately.. seems like we could
segfault in dump_sample if there's evsel == NULL, right?

jirka

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