linux-kernel - Re: [PATCH 2/3] Documentation: riscv: Add documentation that describes the VM layout

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Message-ID: <5279e97c-3841-717c-2a16-c249a61573f9@redhat.com>
Date:   Thu, 25 Feb 2021 11:34:13 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Alexandre Ghiti <alex@...ti.fr>, Jonathan Corbet <corbet@....net>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Arnd Bergmann <arnd@...db.de>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, linux-doc@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, linux-arch@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 2/3] Documentation: riscv: Add documentation that
 describes the VM layout

                  |            |                  |         |> + 
ffffffc000000000 | -256    GB | ffffffc7ffffffff |   32 GB | kasan
> +   ffffffcefee00000 | -196    GB | ffffffcefeffffff |    2 MB | fixmap
> +   ffffffceff000000 | -196    GB | ffffffceffffffff |   16 MB | PCI io
> +   ffffffcf00000000 | -196    GB | ffffffcfffffffff |    4 GB | vmemmap
> +   ffffffd000000000 | -192    GB | ffffffdfffffffff |   64 GB | vmalloc/ioremap space
> +   ffffffe000000000 | -128    GB | ffffffff7fffffff |  126 GB | direct mapping of all physical memory

^ So you could never ever have more than 126 GB, correct?

I assume that's nothing new.

-- 
Thanks,

David / dhildenb