linux-kernel - Re: [PATCH V3 21/21] famfs

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Message-ID: <20260108152713.00001b42@huawei.com>
Date: Thu, 8 Jan 2026 15:27:13 +0000
From: Jonathan Cameron <jonathan.cameron@...wei.com>
To: John Groves <John@...ves.net>
CC: Miklos Szeredi <miklos@...redi.hu>, Dan Williams
	<dan.j.williams@...el.com>, Bernd Schubert <bschubert@....com>, "Alison
 Schofield" <alison.schofield@...el.com>, John Groves <jgroves@...ron.com>,
	Jonathan Corbet <corbet@....net>, Vishal Verma <vishal.l.verma@...el.com>,
	Dave Jiang <dave.jiang@...el.com>, Matthew Wilcox <willy@...radead.org>, Jan
 Kara <jack@...e.cz>, Alexander Viro <viro@...iv.linux.org.uk>, "David
 Hildenbrand" <david@...nel.org>, Christian Brauner <brauner@...nel.org>,
	"Darrick J . Wong" <djwong@...nel.org>, Randy Dunlap <rdunlap@...radead.org>,
	Jeff Layton <jlayton@...nel.org>, Amir Goldstein <amir73il@...il.com>, Stefan
 Hajnoczi <shajnocz@...hat.com>, Joanne Koong <joannelkoong@...il.com>, Josef
 Bacik <josef@...icpanda.com>, Bagas Sanjaya <bagasdotme@...il.com>, Chen
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	Gregory Price <gourry@...rry.net>, Aravind Ramesh <arramesh@...ron.com>, Ajay
 Joshi <ajayjoshi@...ron.com>, <venkataravis@...ron.com>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<nvdimm@...ts.linux.dev>, <linux-cxl@...r.kernel.org>,
	<linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH V3 21/21] famfs_fuse: Add documentation

On Wed,  7 Jan 2026 09:33:30 -0600
John Groves <John@...ves.net> wrote:

> Add Documentation/filesystems/famfs.rst and update MAINTAINERS
> 
> Reviewed-by: Randy Dunlap <rdunlap@...radead.org>
> Tested-by: Randy Dunlap <rdunlap@...radead.org>
> Signed-off-by: John Groves <john@...ves.net>
> ---
>  Documentation/filesystems/famfs.rst | 142 ++++++++++++++++++++++++++++
>  Documentation/filesystems/index.rst |   1 +
>  MAINTAINERS                         |   1 +
>  3 files changed, 144 insertions(+)
>  create mode 100644 Documentation/filesystems/famfs.rst
> 
> diff --git a/Documentation/filesystems/famfs.rst b/Documentation/filesystems/famfs.rst
> new file mode 100644
> index 000000000000..0d3c9ba9b7a8
> --- /dev/null
> +++ b/Documentation/filesystems/famfs.rst

> +Principles of Operation
> +=======================
....
> +When an app accesses a data object in a famfs file, there is no page cache
> +involvement. The CPU cache is loaded directly from the shared memory. In
> +some use cases, this is an enormous reduction read amplification compared
> +to loading an entire page into the page cache.
> +
Trivial but this double blank line seems inconsistent.
I don't mind if it's one or two, but do the same everywhere.

> +
> +Famfs is Not a Conventional File System
> +---------------------------------------

Nice doc.

Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>