linux-kernel - Re: [PATCH] docs: ftrace: fix the wrong path of tracefs

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Date:   Sat, 13 Nov 2021 09:11:45 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Zhaoyu Liu <zackary.liu.pro@...il.com>
Cc:     corbet@....net, mingo@...hat.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] docs: ftrace: fix the wrong path of tracefs

On Sat, 13 Nov 2021 21:37:34 +0800
Zhaoyu Liu <zackary.liu.pro@...il.com> wrote:

> Delete "tracing" due to it has been included in /proc/mounts.
> Delete "echo nop > $tracefs/tracing/current_tracer", maybe
> this command is redundant.
> 
> Signed-off-by: Zhaoyu Liu <zackary.liu.pro@...il.com>

Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>

Jon,

Can you take this through your tree?

Thanks,

-- Steve


> ---
>  Documentation/trace/ftrace.rst | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst
> index 4e5b26f03d5b..b3166c4a7867 100644
> --- a/Documentation/trace/ftrace.rst
> +++ b/Documentation/trace/ftrace.rst
> @@ -2442,11 +2442,10 @@ Or this simple script!
>    #!/bin/bash
>  
>    tracefs=`sed -ne 's/^tracefs \(.*\) tracefs.*/\1/p' /proc/mounts`
> -  echo nop > $tracefs/tracing/current_tracer
> -  echo 0 > $tracefs/tracing/tracing_on
> -  echo $$ > $tracefs/tracing/set_ftrace_pid
> -  echo function > $tracefs/tracing/current_tracer
> -  echo 1 > $tracefs/tracing/tracing_on
> +  echo 0 > $tracefs/tracing_on
> +  echo $$ > $tracefs/set_ftrace_pid
> +  echo function > $tracefs/current_tracer
> +  echo 1 > $tracefs/tracing_on
>    exec "$@"
>  
>