Re: [PATCH v6 5/7] AutoFDO: Enable -ffunction-sections for the AutoFDO build

Kees Cook
2024-10-29T00:10:03Z

On Fri, Oct 25, 2024 at 10:14:07PM -0700, Rong Xu wrote:
> Enable -ffunction-sections by default for the AutoFDO build.
>
> With -ffunction-sections, the compiler places each function in its own
> section named .text.function_name instead of placing all functions in
> the .text section. In the AutoFDO build, this allows the linker to
> utilize profile information to reorganize functions for improved
> utilization of iCache and iTLB.
>
> Co-developed-by: Han Shen <shenhan@google.com>
> Signed-off-by: Han Shen <shenhan@google.com>

Reviewed-by: Kees Cook <kees@kernel.org>

--
Kees Cook