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

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Message-Id: <159972812521.428528.4047280962991773996.stgit@devnote2>
Date:   Thu, 10 Sep 2020 17:55:25 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Jonathan Corbet <corbet@....net>,
        Shuah Khan <skhan@...uxfoundation.org>
Cc:     mhiramat@...nel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, linux-kselftest@...r.kernel.org
Subject: [PATCH v3 3/8] Documentation: tracing: Add tracing_on option to boot-time tracer

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