linux-kernel - RE: [PATCH v3 3/8] Documentation: tracing: Add tracing

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Date:   Thu, 10 Sep 2020 13:26:05 +0000
From:   "Bird, Tim" <Tim.Bird@...y.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Jonathan Corbet <corbet@....net>,
        Shuah Khan <skhan@...uxfoundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
Subject: RE: [PATCH v3 3/8] Documentation: tracing: Add tracing_on option to
 boot-time tracer



> -----Original Message-----
> From: Masami Hiramatsu
 > 
> Add tracing_on option description to the boot-time tracer.
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> ---
>  Documentation/trace/boottime-trace.rst |    4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/trace/boottime-trace.rst b/Documentation/trace/boottime-trace.rst
> index dcb390075ca1..1341b449acaa 100644
> --- a/Documentation/trace/boottime-trace.rst
> +++ b/Documentation/trace/boottime-trace.rst
> @@ -61,6 +61,10 @@ These options can be used for each instance including global ftrace node.
>  ftrace.[instance.INSTANCE.]options = OPT1[, OPT2[...]]
>     Enable given ftrace options.
> 
> +ftrace.[instance.INSTANCE.]tracing_on = 0|1
> +   Enable/Disable tracing on this instance when boot.

when boot. -> when booting.
(or when boot. -> on boot.)
 -- Tim

> +   (you can enable it by the "traceon" event trigger action)
> +
>  ftrace.[instance.INSTANCE.]trace_clock = CLOCK
>     Set given CLOCK to ftrace's trace_clock.
>