linux-kernel - Re: [PATCH v2 1/6] Add AutoFDO support for Clang build

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Message-ID: <CAKwvOdnS-vyTXHaGm4XiLMtg4rsTuUTJ6ao7Ji-fUobZjdBVLw@mail.gmail.com>
Date: Thu, 3 Oct 2024 08:51:51 -0700
From: Nick Desaulniers <ndesaulniers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Rong Xu <xur@...gle.com>, Han Shen <shenhan@...gle.com>, 
	Sriraman Tallam <tmsriram@...gle.com>, David Li <davidxl@...gle.com>, 
	Krzysztof Pszeniczny <kpszeniczny@...gle.com>, 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>, 
	Heiko Carstens <hca@...ux.ibm.com>, "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>, 
	Jann Horn <jannh@...gle.com>, Jonathan Corbet <corbet@....net>, Josh Poimboeuf <jpoimboe@...nel.org>, 
	Juergen Gross <jgross@...e.com>, Justin Stitt <justinstitt@...gle.com>, Kees Cook <kees@...nel.org>, 
	linux-arch@...r.kernel.org, linux-doc@...r.kernel.org, 
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, 
	llvm@...ts.linux.dev, Masahiro Yamada <masahiroy@...nel.org>, 
	"Mike Rapoport (IBM)" <rppt@...nel.org>, Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
	"Paul E. McKenney" <paulmck@...nel.org>, Samuel Holland <samuel.holland@...ive.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Wei Yang <richard.weiyang@...il.com>, 
	workflows@...r.kernel.org, x86@...nel.org, "Xin Li (Intel)" <xin@...or.com>, 
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v2 1/6] Add AutoFDO support for Clang build

On Thu, Oct 3, 2024 at 8:42 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Wed, Oct 02, 2024 at 04:34:00PM -0700, Rong Xu wrote:
> > +6) Rebuild the kernel using the AutoFDO profile file with the same config as step 1,
> > +    (Note CONFIG_AUTOFDO_CLANG needs to be enabled):
> > +
> > +      .. code-block:: sh
> > +
> > +         $ make LLVM=1 CLANG_AUTOFDO_PROFILE=<profile_file
> > +
>
>
> Can this be done without the endless ... code-block nonsense?

Dunno, I think it looks pretty nice once rendered. Makes it
straightforward for a user to copy+paste. I asked Rong explicitly to
make sure the documentation made it so that non-googler or folks not
working on autofdo or propellor could reproduce (since we'll probably
end up standing up CI for these newer configs, and BOLT).
-- 
Thanks,
~Nick Desaulniers