linux-kernel - Re: [PATCH] Documentation/ftrace: Correct wording on trace

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Date: Wed, 21 Feb 2024 01:59:53 +0000
From: Dmitry Safonov <dima@...sta.com>
To: Steven Rostedt <rostedt@...dmis.org>,
 Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Jonathan Corbet <corbet@....net>
Cc: linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 linux-doc@...r.kernel.org, Dmitry Safonov <0x7f454c46@...il.com>
Subject: Re: [PATCH] Documentation/ftrace: Correct wording on trace_options
 sharing

On 2/20/24 21:00, Dmitry Safonov wrote:
[..]
> diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst
> index 7e7b8ec17934..c79a6bcef3c9 100644
> --- a/Documentation/trace/ftrace.rst
> +++ b/Documentation/trace/ftrace.rst
> @@ -3603,9 +3603,9 @@ The files in the new directory work just like the files with the
>  same name in the tracing directory except the buffer that is used
>  is a separate and new buffer. The files affect that buffer but do not
>  affect the main buffer with the exception of trace_options. Currently,
> -the trace_options affect all instances and the top level buffer
> -the same, but this may change in future releases. That is, options
> -may become specific to the instance they reside in.
> +most of the options are specific to the instance they reside in, but
> +trace_printk, printk-msg-only and record-cmd are affecting all instances
> +and the top level buffer, but this may change in future releases.

Actually, it seems that at least on -next these 3 are not shared as
well? (if my tests aren't misbehaving)

So, just remove the part about trace_options exception?

Thanks,
             Dmitry