linux-kernel - Re: [PATCH 06/24] perf daemon: Add config file support

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Date:   Fri, 5 Feb 2021 21:14:54 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>,
        Alexei Budankov <abudankov@...wei.com>
Subject: Re: [PATCH 06/24] perf daemon: Add config file support

On Sun, Jan 31, 2021 at 8:49 AM Jiri Olsa <jolsa@...nel.org> wrote:
[SNIP]
> @@ -263,9 +605,16 @@ static int __cmd_start(struct daemon *daemon, struct option parent_options[],
>         signal(SIGTERM, sig_handler);
>
>         while (!done && !err) {
> -               if (fdarray__poll(&fda, -1)) {
> +               err = daemon__reconfig(daemon);

I think it's confusing since you put the reconfig function here.
What not split normal and reconfig passes?

I mean something like below

 __cmd_start()
{
    setup_server_config();
    daemon__run();

    while (!done && !err) {
        ...
        if (reconfig) {
            daemon__kill();
            setup_server_config();
            daemon__reconfig();
        }
    }

Thanks,
Namhyung


> +
> +               if (!err && fdarray__poll(&fda, -1)) {
> +                       bool reconfig = false;
> +
>                         if (fda.entries[sock_pos].revents & POLLIN)
>                                 err = handle_server_socket(daemon, sock_fd);
> +
> +                       if (reconfig)
> +                               err = setup_server_config(daemon);
>                 }
>         }
>
> --
> 2.29.2
>