linux-kernel - Re: [PATCH 07/22] perf daemon: Add daemon command

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Date:   Thu, 21 Jan 2021 13:53:22 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        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 07/22] perf daemon: Add daemon command

On Wed, Jan 20, 2021 at 3:31 AM Jiri Olsa <jolsa@...hat.com> wrote:
>
> On Tue, Jan 19, 2021 at 01:08:17PM +0900, Namhyung Kim wrote:
> > > +               /* Reconfig session. */
> > > +               pr_debug2("reconfig: session '%s' start\n", session->name);
> > > +               if (session->pid > 0) {
> > > +                       session__kill(session);
> > > +                       pr_info("reconfig: session '%s' killed\n", session->name);
> > > +               }
> > > +               if (session__run(session, daemon))
> >
> > Does it call a config function?  Or is it called already?
>
> daemon__reconfig kills and starts sessions based
> on the config data read by setup_server_config
>
> >
> > > +                       return -1;
> > > +               pr_debug2("reconfig: session '%s' done\n", session->name);
> > > +               session->state = SESSION_STATE__OK;
> >
> > I think RUNNING is a better name.
>
> I'll check, I'll put the state graph in comment,
> so we can discuss the changes

Yeah, that would be helpful.

Thanks,
Namhyung