Hi Tim,
On Thu, 10 Sep 2020 13:26:05 +0000 "Bird, Tim" Tim.Bird@sony.com wrote:
-----Original Message----- From: Masami Hiramatsu
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
- (you can enable it by the "traceon" event trigger action)
ftrace.[instance.INSTANCE.]trace_clock = CLOCK Set given CLOCK to ftrace's trace_clock.