linux-kernel - Re: [PATCH 1/2] perf evsel: Make evsel_

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Date:   Tue, 22 Mar 2022 18:36:50 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     kajoljain <kjain@...ux.ibm.com>
Cc:     Kim Phillips <kim.phillips@....com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Ian Rogers <irogers@...gle.com>,
        Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
        Joao Martins <joao.m.martins@...cle.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Mark Rutland <mark.rutland@....com>,
        Michael Petlan <mpetlan@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Robert Richter <robert.richter@....com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 1/2] perf evsel: Make evsel__env always return a valid env

Em Tue, Nov 23, 2021 at 01:56:38PM +0530, kajoljain escreveu:
> 
> 
> On 10/5/21 3:11 AM, Kim Phillips wrote:
> > It's possible to have an evsel and evsel->evlist populated without
> > an evsel->evlist->env, when, e.g., cmd_record is in its error path.
> > 
> > Future patches will add support for evsel__open_strerror to be able
> > to customize error messaging based on perf_env__{arch,cpuid}, so
> > let's have evsel__env return &perf_env instead of NULL in that case.
> > 
> 
> Patch looks good to me.
> 
> Reviewed-by: Kajol Jain<kjain@...ux.ibm.com>

Collecting this one now, found it thru the cracks.

- Arnaldo
 
> Thanks,
> Kajol Jain
> 
> > Signed-off-by: Kim Phillips <kim.phillips@....com>
> > Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> > Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
> > Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> > Cc: Ian Rogers <irogers@...gle.com>
> > Cc: Ingo Molnar <mingo@...hat.com>
> > Cc: Jiri Olsa <jolsa@...hat.com>
> > Cc: Joao Martins <joao.m.martins@...cle.com>
> > Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> > Cc: Mark Rutland <mark.rutland@....com>
> > Cc: Michael Petlan <mpetlan@...hat.com>
> > Cc: Namhyung Kim <namhyung@...nel.org>
> > Cc: Peter Zijlstra <peterz@...radead.org>
> > Cc: Robert Richter <robert.richter@....com>
> > Cc: Stephane Eranian <eranian@...gle.com>
> > ---
> >  tools/perf/util/evsel.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> > index dbfeceb2546c..b915840690d4 100644
> > --- a/tools/perf/util/evsel.c
> > +++ b/tools/perf/util/evsel.c
> > @@ -2857,7 +2857,7 @@ int evsel__open_strerror(struct evsel *evsel, struct target *target,
> >  
> >  struct perf_env *evsel__env(struct evsel *evsel)
> >  {
> > -	if (evsel && evsel->evlist)
> > +	if (evsel && evsel->evlist && evsel->evlist->env)
> >  		return evsel->evlist->env;
> >  	return &perf_env;
> >  }
> > 

-- 

- Arnaldo