Re: [PATCH v2 0/4] Introduce %rip-relative addressing to PER_CPU_VAR macro

Dave Hansen
2023-10-12T20:53:58Z

On 10/12/23 13:12, Uros Bizjak wrote:
> The last patch introduces (%rip) suffix and uses it for x86_64 target,
> resulting in a small code size decrease: text data bss dec hex filename
> 25510677 4386685 808388 30705750 1d48856 vmlinux-new.o 25510629 4386685
> 808388 30705702 1d48826 vmlinux-old.o

I feel like I'm missing some of the motivation here.

50 bytes is great and all, but it isn't without the cost of changing
some rules and introducing potential PER_CPU_ARG() vs. PER_CPU_VAR()
confusion.

Are there some other side benefits? What else does this enable?