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Date:   Sat, 9 Apr 2022 12:44:56 -0300
From:   Arnaldo Carvalho de Melo <acme@kernel.org>
To:     Ian Rogers <irogers@google.com>
Cc:     John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
        Mathieu Poirier <mathieu.poirier@linaro.org>,
        Leo Yan <leo.yan@linaro.org>,
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Subject: Re: [PATCH 1/5] perf annotate: Drop objdump stderr
Message-ID: <YlGp+EVwne5QbjtY@kernel.org>
References: <20220407230503.1265036-1-irogers@google.com>
 <20220407230503.1265036-2-irogers@google.com>
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Em Thu, Apr 07, 2022 at 04:04:59PM -0700, Ian Rogers escreveu:
> If objdump writes to stderr it can block waiting for it to be read. As
> perf doesn't read stderr then progress stops with perf waiting for
> stdout output.

Thanks, applied.

- Arnaldo

 
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
>  tools/perf/util/annotate.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index e4c641b240df..82cc396ef516 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -2047,6 +2047,7 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
>  	objdump_process.argv = objdump_argv;
>  	objdump_process.out = -1;
>  	objdump_process.err = -1;
> +	objdump_process.no_stderr = 1;
>  	if (start_command(&objdump_process)) {
>  		pr_err("Failure starting to run %s\n", command);
>  		err = -1;
> -- 
> 2.35.1.1178.g4f1659d476-goog

-- 

- Arnaldo