linux-kernel - Re: [PATCH] x86/mm: Fix documentation of module mapping with 4-level paging

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Message-ID: <6feb8d6d-9856-1f0d-7bfa-41e05961a719@virtuozzo.com>
Date:   Mon, 2 Apr 2018 19:58:29 +0300
From:   Andrey Ryabinin <aryabinin@...tuozzo.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/mm: Fix documentation of module mapping with 4-level
 paging



On 04/02/2018 03:10 PM, Kirill A. Shutemov wrote:
> f5a40711fa58 ("x86/mm: Set MODULES_END to 0xffffffffff000000") changed
> MODULES_END back to fixed value, but didn't update documentation of
> memory layout for 4-level paging.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Fixes: f5a40711fa58 ("x86/mm: Set MODULES_END to 0xffffffffff000000")
> Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>
> ---

Acked-by: Andrey Ryabinin <aryabinin@...tuozzo.com>

>  Documentation/x86/x86_64/mm.txt | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt
> index ea91cb61a602..5432a96d31ff 100644
> --- a/Documentation/x86/x86_64/mm.txt
> +++ b/Documentation/x86/x86_64/mm.txt
> @@ -20,7 +20,7 @@ ffffff0000000000 - ffffff7fffffffff (=39 bits) %esp fixup stacks
>  ffffffef00000000 - fffffffeffffffff (=64 GB) EFI region mapping space
>  ... unused hole ...
>  ffffffff80000000 - ffffffff9fffffff (=512 MB)  kernel text mapping, from phys 0
> -ffffffffa0000000 - [fixmap start]   (~1526 MB) module mapping space (variable)
> +ffffffffa0000000 - fffffffffeffffff (1520 MB) module mapping space
>  [fixmap start]   - ffffffffff5fffff kernel-internal fixmap range
>  ffffffffff600000 - ffffffffff600fff (=4 kB) legacy vsyscall ABI
>  ffffffffffe00000 - ffffffffffffffff (=2 MB) unused hole
>