linux-kernel - Re: [PATCH v5 1/3] man/man2/mremap.2: explicitly document the simple move operation

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Message-ID: <hxbuhtkuorfe5d5lr7wi5cny7vx6bt3kc2xaoknfz4h6vk6djv@kpgaur7636rl>
Date: Fri, 15 Aug 2025 12:05:54 +0200
From: Alejandro Colomar <alx@...nel.org>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: linux-man@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, 
	Peter Xu <peterx@...hat.com>, Alexander Viro <viro@...iv.linux.org.uk>, 
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>, 
	"Liam R . Howlett" <Liam.Howlett@...cle.com>, Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>, 
	Pedro Falcato <pfalcato@...e.de>, Rik van Riel <riel@...riel.com>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org
Subject: Re: [PATCH v5 1/3] man/man2/mremap.2: explicitly document the simple
 move operation

Hi Lorenzo,

On Mon, Aug 11, 2025 at 03:59:37PM +0100, Lorenzo Stoakes wrote:
> In preparation for discussing newly introduced mremap() behaviour to permit
> the move of multiple mappings at once, add a section to the mremap.2 man
> page to describe these operations in general.
> 
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>

Thanks!  I've applied this patch.
<https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=6ba37b9e14f6565d0cccecb634100d7fe11d22fb>


Have a lovely day!
Alex

> ---
>  man/man2/mremap.2 | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/man/man2/mremap.2 b/man/man2/mremap.2
> index 2168ca728..4e3c8e54e 100644
> --- a/man/man2/mremap.2
> +++ b/man/man2/mremap.2
> @@ -25,6 +25,20 @@ moving it at the same time (controlled by the
>  argument and
>  the available virtual address space).
>  .P
> +Mappings can also simply be moved
> +(without any resizing)
> +by specifying equal
> +.I old_size
> +and
> +.I new_size
> +and using the
> +.B MREMAP_FIXED
> +flag
> +(see below).
> +The
> +.B MREMAP_DONTUNMAP
> +flag may also be specified.
> +.P
>  .I old_address
>  is the old address of the virtual memory block that you
>  want to expand (or shrink).
> -- 
> 2.50.1
> 

-- 
<https://www.alejandro-colomar.es/>

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