linux-kernel - Re: [PATCH] docs: f2fs: specify extent cache for read explicitly

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Message-ID: <5961416c-e5d6-9321-3ae8-f63b70d17d63@infradead.org>
Date:   Sun, 16 Apr 2023 21:13:35 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Yangtao Li <frank.li@...o.com>, Jaegeuk Kim <jaegeuk@...nel.org>,
        Chao Yu <chao@...nel.org>, Jonathan Corbet <corbet@....net>
Cc:     linux-f2fs-devel@...ts.sourceforge.net, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] docs: f2fs: specify extent cache for read explicitly

Hi,

On 4/16/23 21:03, Yangtao Li wrote:
> Let's descrbie it's read extent cache.
> 
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
>  Documentation/filesystems/f2fs.rst | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst
> index c57745375edb..f68337086dec 100644
> --- a/Documentation/filesystems/f2fs.rst
> +++ b/Documentation/filesystems/f2fs.rst
> @@ -163,11 +163,11 @@ barrier			 If this option is set, cache_flush commands are allowed to be
>  fastboot		 This option is used when a system wants to reduce mount
>  			 time as much as possible, even though normal performance
>  			 can be sacrificed.
> -extent_cache		 Enable an extent cache based on rb-tree, it can cache
> +extent_cache		 Enable an read extent cache based on rb-tree, it can cache

			 Enable a read extent cache based on rb-tree. It can cache

>  			 as many as extent which map between contiguous logical

I don't know that that is trying to say. Maybe this?

			 many extents which map between contiguous logical

Does it cache many extents or all of them?  If all of them, then maybe this?

			 the extents which map between contiguous logical

>  			 address and physical address per inode, resulting in
>  			 increasing the cache hit ratio. Set by default.
> -noextent_cache		 Disable an extent cache based on rb-tree explicitly, see
> +noextent_cache		 Disable an read extent cache based on rb-tree explicitly, see

				 Disable a read extent cache based on rb-tree explicitly. See

>  			 the above extent_cache mount option.
>  noinline_data		 Disable the inline data feature, inline data feature is
>  			 enabled by default.

-- 
~Randy