linux-kernel - Re: [PATCH 1/3] perf tools: Set debug_peo_args and redirect_to_stderr to correct values in perf_quiet

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Date:   Tue, 20 Dec 2022 15:17:30 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Yang Jihong <yangjihong1@...wei.com>, peterz@...radead.org,
        mingo@...hat.com, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, irogers@...gle.com, carsten.haitzler@....com,
        leo.yan@...aro.org, ravi.bangoria@....com, martin.lau@...nel.org,
        ak@...ux.intel.com, masami.hiramatsu.pt@...achi.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] perf tools: Set debug_peo_args and
 redirect_to_stderr to correct values in perf_quiet_option

Em Tue, Dec 20, 2022 at 09:35:36AM +0200, Adrian Hunter escreveu:
> On 20/12/22 05:57, Yang Jihong wrote:
> > When perf uses quiet mode, perf_quiet_option sets debug_peo_args to -1,
> > and display_attr incorrectly determines the value of debug_peo_args.
> > As a result, unexpected information is displayed.
> > 
> > Before:
> >   # perf record --quiet -- ls > /dev/null
> >   ------------------------------------------------------------
> >   perf_event_attr:
> >     size                             128
> >     { sample_period, sample_freq }   4000
> >     sample_type                      IP|TID|TIME|PERIOD
> >     read_format                      ID|LOST
> >     disabled                         1
> >     inherit                          1
> >     mmap                             1
> >     comm                             1
> >     freq                             1
> >     enable_on_exec                   1
> >     task                             1
> >     precise_ip                       3
> >     sample_id_all                    1
> >     exclude_guest                    1
> >     mmap2                            1
> >     comm_exec                        1
> >     ksymbol                          1
> >     bpf_event                        1
> >   ------------------------------------------------------------
> >   ...
> > 
> > After:
> >   # perf record --quiet -- ls > /dev/null
> >   #
> > 
> > redirect_to_stderr is a similar problem.
> > 
> > Fixes: f78eaef0e049 ("perf tools: Allow to force redirect pr_debug to stderr.")
> > Fixes: ccd26741f5e6 ("perf tool: Provide an option to print perf_event_open args and return value")
> > Suggested-by: Adrian Hunter <adrian.hunter@...el.com>
> > Signed-off-by: Yang Jihong <yangjihong1@...wei.com>
> 
> Reviewed-by: Adrian Hunter <adrian.hunter@...el.com>

Thanks, applied all patches in this series.

- Arnaldo