linux-kernel - Re: [PATCH] [RFC, DO NOT APPLY] vmlinux.lds: revert link speed regression

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Message-Id: <c5855908-df1f-46be-a8cf-aba066b52585@app.fastmail.com>
Date: Tue, 21 Jan 2025 22:17:50 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Rong Xu" <xur@...gle.com>, "Arnd Bergmann" <arnd@...nel.org>
Cc: linux-kbuild@...r.kernel.org, "Masahiro Yamada" <masahiroy@...nel.org>,
 linux-kernel@...r.kernel.org, regressions@...ts.linux.dev,
 "Han Shen" <shenhan@...gle.com>, "Nathan Chancellor" <nathan@...nel.org>,
 "Kees Cook" <kees@...nel.org>, "Jann Horn" <jannh@...gle.com>,
 "Ard Biesheuvel" <ardb@...nel.org>, Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH] [RFC, DO NOT APPLY] vmlinux.lds: revert link speed regression

On Tue, Jan 21, 2025, at 18:45, Rong Xu wrote:
> On Mon, Jan 20, 2025 at 1:29 PM Arnd Bergmann <arnd@...nel.org> wrote:
>
> Yes. The order could be conditional. As a matter of fact, the first
> version was conditional.
> I changed it based on the reviewer comments to reduce conditions for
> more maintainable code.
> I would like to work from the ld.bfd side to see if we can fix the problem.

Makes sense. At least once we understand what makes the linker so slow
and fix future versions, it should also be possible to come up with
a more effective workaround for the existing linkers that suffer from it.

     Arnd