linux-kernel - Re: [PATCH 38/79] libperf: Add perf_evlist_

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Date:   Tue, 23 Jul 2019 00:17:19 +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>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andi Kleen <ak@...ux.intel.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>
Subject: Re: [PATCH 38/79] libperf: Add perf_evlist__init function

On Mon, Jul 22, 2019 at 04:39:25PM -0300, Arnaldo Carvalho de Melo wrote:

SNIP

> 
> I'm applying it to fix this issue and avoid a bisection break. I'm now
> going to run 'perf test' after each cset too. And probably the next cset
> has this issue as well, i.e. reordering of initialization in the
> perf_evsel__init() case.
> 
> diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
> index aacddd9b2d64..f4aa6cf80559 100644
> --- a/tools/perf/util/evlist.c
> +++ b/tools/perf/util/evlist.c
> @@ -49,11 +49,11 @@ void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
>  
>  	for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
>  		INIT_HLIST_HEAD(&evlist->heads[i]);
> +	perf_evlist__init(&evlist->core);

right, needs to be before perf_evlist__set_maps call

thanks,
jirka

>  	perf_evlist__set_maps(evlist, cpus, threads);
>  	fdarray__init(&evlist->pollfd, 64);
>  	evlist->workload.pid = -1;
>  	evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
> -	perf_evlist__init(&evlist->core);
>  }
>  
>  struct evlist *evlist__new(void)