Re: [RFC PATCH 2/2] tracing: Record and show boot ID in last_boot_info

[Steven Rostedt]

On Thu, 21 May 2026 23:57:16 +0900
"Masami Hiramatsu (Google)" <mhiramat@xxxxxxxxxx> wrote:

> @@ -4804,6 +4806,7 @@ struct trace_mod_entry {
>  struct trace_scratch {
>  	unsigned int		clock_id;
>  	unsigned long		text_addr;
> +	u8			boot_id[UUID_SIZE];
>  	unsigned long		nr_entries;
>  	struct trace_mod_entry	entries[];
>  };

I just don't like wasting scratch space if boot_id isn't defined. But I
can't figure out a way to optionally have it there without wasting space
anyway.

If the get_boot_id() is accepted by the random folks, then I'm fine with
this change.

-- Steve