linux-kernel - Re: [PATCH v2 06/12] docs: path-lookup: Add macro name to symlink limit description

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Date:   Mon, 19 Apr 2021 11:22:22 +1000
From:   NeilBrown <neilb@...e.de>
To:     Fox Chen <foxhlchen@...il.com>
Cc:     Fox Chen <foxhlchen@...il.com>, corbet@....net,
        vegard.nossum@...cle.com, viro@...iv.linux.org.uk,
        rdunlap@...radead.org, grandmaster@...klimov.de,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH v2 06/12] docs: path-lookup: Add macro name to symlink
 limit description

On Tue, Mar 16 2021, Fox Chen wrote:

> Add macro name MAXSYMLINKS to the symlink limit description, so
> that it is consistent with path name length description above.
>
> Signed-off-by: Fox Chen <foxhlchen@...il.com>

Reviewed-by: NeilBrown <neilb@...e.de>

Thanks,
NeilBrown

> ---
>  Documentation/filesystems/path-lookup.rst | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/filesystems/path-lookup.rst b/Documentation/filesystems/path-lookup.rst
> index 66697db74955..af5c20fecfef 100644
> --- a/Documentation/filesystems/path-lookup.rst
> +++ b/Documentation/filesystems/path-lookup.rst
> @@ -992,8 +992,8 @@ is 4096.  There are a number of reasons for this limit; not letting the
>  kernel spend too much time on just one path is one of them.  With
>  symbolic links you can effectively generate much longer paths so some
>  sort of limit is needed for the same reason.  Linux imposes a limit of
> -at most 40 symlinks in any one path lookup.  It previously imposed a
> -further limit of eight on the maximum depth of recursion, but that was
> +at most 40 (MAXSYMLINKS) symlinks in any one path lookup.  It previously imposed
> +a further limit of eight on the maximum depth of recursion, but that was
>  raised to 40 when a separate stack was implemented, so there is now
>  just the one limit.
>  
> -- 
> 2.30.2

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