From: Masami Hiramatsu <mhiramat@kernel.org>
To: "Bird, Tim" <Tim.Bird@sony.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
Randy Dunlap <rdunlap@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
"linux-kselftest@vger.kernel.org"
<linux-kselftest@vger.kernel.org>
Subject: Re: [PATCH v3 3/8] Documentation: tracing: Add tracing_on option to boot-time tracer
Date: Fri, 11 Sep 2020 07:41:10 +0900 [thread overview]
Message-ID: <20200911074110.fa9d19c152f3c35947199360@kernel.org> (raw)
In-Reply-To: <CY4PR13MB1175F981AB2931C228EBF42FFD270@CY4PR13MB1175.namprd13.prod.outlook.com>
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.
> >
>
--
Masami Hiramatsu <mhiramat@kernel.org>
next prev parent reply other threads:[~2020-09-10 22:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 8:54 [PATCH v3 0/8] tracing/boot: Add new options for tracing specific period Masami Hiramatsu
2020-09-10 8:55 ` [PATCH v3 1/8] kprobes: tracing/kprobes: Fix to kill kprobes on initmem after boot Masami Hiramatsu
2020-09-10 8:55 ` [PATCH v3 2/8] tracing/boot: Add per-instance tracing_on option support Masami Hiramatsu
2020-09-10 8:55 ` [PATCH v3 3/8] Documentation: tracing: Add tracing_on option to boot-time tracer Masami Hiramatsu
2020-09-10 13:26 ` Bird, Tim
2020-09-10 22:41 ` Masami Hiramatsu [this message]
2020-09-11 0:47 ` [PATCH v3.1 " Masami Hiramatsu
2020-09-10 8:55 ` [PATCH v3 4/8] tracing/kprobes: Support perf-style return probe Masami Hiramatsu
2020-09-10 8:55 ` [PATCH v3 5/8] tracing/uprobes: " Masami Hiramatsu
2020-09-10 8:55 ` [PATCH v3 6/8] Documentation: tracing: Add %return suffix description Masami Hiramatsu
2020-09-10 8:56 ` [PATCH v3 7/8] Documentation: tracing: boot: Add an example of tracing function-calls Masami Hiramatsu
2020-09-10 8:56 ` [PATCH v3 8/8] selftests/ftrace: Add %return suffix tests Masami Hiramatsu
2020-09-10 23:34 ` [PATCH v3 0/8] tracing/boot: Add new options for tracing specific period Steven Rostedt
2020-09-11 1:27 ` Masami Hiramatsu
2020-09-11 1:34 ` Shuah Khan
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