linux-kernel - Re: [PATCH] tracing: add tgid into common field

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Message-ID: <20201013090511.1f2f71f6@gandalf.local.home>
Date:   Tue, 13 Oct 2020 09:05:11 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Yafang Shao <laoar.shao@...il.com>
Cc:     mingo@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tracing: add tgid into common field

On Tue, 13 Oct 2020 13:54:54 +0800
Yafang Shao <laoar.shao@...il.com> wrote:

> --- a/include/linux/trace_events.h
> +++ b/include/linux/trace_events.h
> @@ -67,6 +67,7 @@ struct trace_entry {
>  	unsigned char		flags;
>  	unsigned char		preempt_count;
>  	int			pid;
> +	int			tgid;
>  };
>  

Sorry, this adds another 4 bytes to *every* event, if you want it to or
not. I'd rather have some ways to remove fields from this header, and not
add more to it.

I can't take this patch.

-- Steve