linux-kernel - Re: [RFC][PATCH v6 3/5] trace/README: Document objtrace trigger syntax

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Date:   Fri, 17 Dec 2021 00:02:34 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Jeff Xie <xiehuan09@...il.com>
Cc:     rostedt@...dmis.org, mhiramat@...nel.org, mingo@...hat.com,
        zanussi@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH v6 3/5] trace/README: Document objtrace trigger
 syntax

Hi Jeff,

On Tue, 30 Nov 2021 00:49:49 +0800
Jeff Xie <xiehuan09@...il.com> wrote:

> Add a short description of the use of objtrace trigger.

Please merge this into the [1/5] and [2/5], because the changes of
"a new feature" and "the existance of the feature which
kernel indicates" must be atomic.

My recommendation is

- add following line in the first patch

	"\t            objtrace:add:obj[:count][if <filter>]\n"

- and update it as following in the next patch according to the changes

	"\t            objtrace:add:obj[,offset][:type][:count][if <filter>]\n"


Thank you!


> 
> Signed-off-by: Jeff Xie <xiehuan09@...il.com>
> ---
>  kernel/trace/trace.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index 88de94da596b..a84b6813769e 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -5590,6 +5590,9 @@ static const char readme_msg[] =
>  	"\t            enable_hist:<system>:<event>\n"
>  	"\t            disable_hist:<system>:<event>\n"
>  #endif
> +#ifdef CONFIG_TRACE_OBJECT
> +	"\t            objtrace:add:obj[,offset][:type][:count][if <filter>]\n"
> +#endif
>  #ifdef CONFIG_STACKTRACE
>  	"\t\t    stacktrace\n"
>  #endif
> -- 
> 2.25.1
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>