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From:   Florian Weimer <fweimer@redhat.com>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Andrew Lutomirski <luto@kernel.org>,
        "the arch\/x86 maintainers" <x86@kernel.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        linux-api@vger.kernel.org, Peter Anvin <hpa@zytor.com>,
        Peter Zijlstra <peterz@infradead.org>, bp@alien8.de,
        vapier@gentoo.org, hjl.tools@gmail.com, dalias@libc.org,
        x32@buildd.debian.org, Arnd Bergmann <arnd@arndb.de>,
        Will Deacon <will.deacon@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: Can we drop upstream Linux x32 support?
References: <CALCETrXoRAibsbWa9nfbDrt0iEuebMnCMhSFg-d9W-J2g8mDjw@mail.gmail.com>
        <CAHk-=wi_Kp=3XmGDdzmadzFSPFvuL+aAJ6ZPAR=o4z=KwYT2vw@mail.gmail.com>
Date:   Tue, 11 Dec 2018 09:16:05 +0100
In-Reply-To: <CAHk-=wi_Kp=3XmGDdzmadzFSPFvuL+aAJ6ZPAR=o4z=KwYT2vw@mail.gmail.com>
        (Linus Torvalds's message of "Mon, 10 Dec 2018 17:40:33 -0800")
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* Linus Torvalds:

> Apparently the main real use case is for extreme benchmarking. It's
> the only use-case where the complexity of maintaining a whole
> development environment and distro is worth it, it seems. Apparently a
> number of Spec submissions have been done with the x32 model.

Are you sure GCC was used for that?

ICC has a 32-bit pointer mode which does not change the (64-bit) kernel
interface.

Thanks,
Florian