Re: [PATCH] ring-buffer: make the const read-only 'type' static

Christophe JAILLET
2025-07-19T06:41:21Z

Le 14/07/2025 à 18:15, Steven Rostedt a écrit :
> On Mon, 14 Jul 2025 17:08:58 +0100
> Colin Ian King <colin.i.king@gmail.com> wrote:
>
>> Don't populate the read-only 'type' on the stack at run time,
>> instead make it static.
>
> Hmm, why not?
>
> -- Steve
>
>

This is more efficient because there is no need to copy things on the
stack at run-time.

It also makes binary slightly smaller.

On my x86_64, with allmodconfig:
Before:
======
229194 924492 35104 1188790 1223b6 kernel/trace/ring_buffer.o

After:
=====
228873 924268 35040 1188181 122155 kernel/trace/ring_buffer.o

CJ