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Message-ID: <202410281709.DDFE98FA3@keescook>
Date: Mon, 28 Oct 2024 17:10:00 -0700
From: Kees Cook <kees@...nel.org>
To: Rong Xu <xur@...gle.com>
Cc: Alice Ryhl <aliceryhl@...gle.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Arnd Bergmann <arnd@...db.de>, Bill Wendling <morbo@...gle.com>,
Borislav Petkov <bp@...en8.de>, Breno Leitao <leitao@...ian.org>,
Brian Gerst <brgerst@...il.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
David Li <davidxl@...gle.com>, Han Shen <shenhan@...gle.com>,
Heiko Carstens <hca@...ux.ibm.com>,
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Juergen Gross <jgross@...e.com>,
Justin Stitt <justinstitt@...gle.com>,
Masahiro Yamada <masahiroy@...nel.org>,
"Mike Rapoport (IBM)" <rppt@...nel.org>,
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Subject: Re: [PATCH v6 5/7] AutoFDO: Enable -ffunction-sections for the
AutoFDO build
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@...gle.com>
> Signed-off-by: Han Shen <shenhan@...gle.com>
Reviewed-by: Kees Cook <kees@...nel.org>
--
Kees Cook
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