diff mbox series

[v3,3/8] Documentation: tracing: Add tracing_on option to boot-time tracer

Message ID 159972812521.428528.4047280962991773996.stgit@devnote2
State New
Headers show
Series tracing/boot: Add new options for tracing specific period | expand

Commit Message

Masami Hiramatsu Sept. 10, 2020, 8:55 a.m. UTC
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(+)

Comments

Bird, Tim Sept. 10, 2020, 1:26 p.m. UTC | #1
> -----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.)
 -- 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 Sept. 10, 2020, 10:41 p.m. UTC | #2
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.
> > 
>
diff mbox series

Patch

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.