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

[Christophe JAILLET]

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@xxxxxxxxx> 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