Hi Tim,

On Thu, 10 Sep 2020 13:26:05 +0000
"Bird, Tim" [off-list ref] wrote:

quoted

-----Original Message-----
From: Masami Hiramatsu

 > 

quoted

Add tracing_on option description to the boot-time tracer.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.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.)

Thanks! "when booting" or maybe "when starting boot-time tracing"
will be more accurate, since if user sets the "ftrace=function"
in the kernel command line, it will start tracing function calls
until the boot-time tracing stops it by this option.

Thank you,

 -- Tim

quoted

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

-- 
Masami Hiramatsu [off-list ref]