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Documentation: tracing: Add tracing_on option to boot-time tracer 

Add tracing_on option description to the boot-time tracer.

Link: https://lkml.kernel.org/r/159978523520.485820.9250337223076929279.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2020-09-11 09:47:15 +09:00 committed by Steven Rostedt (VMware)
parent 8490db06f9
commit c51ba51798
1 changed files with 4 additions and 0 deletions
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Documentation/trace/boottime-trace.rst
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@ -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 starting boot-time tracing.
(you can enable it by the "traceon" event trigger action)
ftrace.[instance.INSTANCE.]trace_clock = CLOCK
Set given CLOCK to ftrace's trace_clock.