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Date: Mon, 29 Apr 2024 14:05:12 +0200 (CEST)
From: Michael Matz <matz@suse.de>
To: Borislav Petkov <bp@alien8.de>
cc: Jiri Slaby <jirislaby@kernel.org>, Ard Biesheuvel <ardb+git@google.com>, 
    linux-kernel@vger.kernel.org, x86@kernel.org, 
    Ard Biesheuvel <ardb@kernel.org>, Nathan Chancellor <nathan@kernel.org>, 
    Nick Desaulniers <ndesaulniers@google.com>, 
    Bill Wendling <morbo@google.com>, Justin Stitt <justinstitt@google.com>, 
    Song Liu <song@kernel.org>, Ricardo Ribalda <ribalda@kernel.org>, 
    Fangrui Song <maskray@google.com>, Arthur Eubanks <aeubanks@google.com>, 
    stable@vger.kernel.org
Subject: Re: [PATCH] x86/purgatory: Switch to the position-independent small
 code model
In-Reply-To: <20240420131717.GAZiPAXY9EAYnHajaw@fat_crate.local>
Message-ID: <836c267f-a028-acce-8b19-180162a5febc@suse.de>
References: <20240418201705.3673200-2-ardb+git@google.com> <3f23b551-4815-4a06-9217-ff5beeb80df2@kernel.org> <20240420131717.GAZiPAXY9EAYnHajaw@fat_crate.local>
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Hello,

On Sat, 20 Apr 2024, Borislav Petkov wrote:

> Interesting. I thought gcc doesn't have problems here yet and was
> talking to Matz on Thu about it and it seems he's forgotten about his
> statement too that "you should simply stop using -mcmodel=large.  Noone
> should use it." :-)

It may be so ingrained in my brain that I'm not _always_ saying it when 
talking about the large code model over a beer.  And indeed I know of no 
particular problems with it vis GCC, but that doesn't mean it's a good 
idea to use :-)

So once again: "everyone should simply stop using -mcmodel=large.  Noone 
should use it."

So the patch goes strictly into the direction of betterment of the 
universe. :)


Ciao,
Michael.