From: Damien Le Moal <dlemoal@kernel.org>
To: Christoph Hellwig <hch@lst.de>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Carlos Maiolino <cem@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
willy@infradead.org, hans.holmberg@wdc.com, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org
Subject: Re: allow file systems to increase the minimum writeback chunk size
Date: Wed, 15 Oct 2025 16:11:35 +0900 [thread overview]
Message-ID: <f7c41a0a-94d0-4189-b05c-bea31429b1be@kernel.org> (raw)
In-Reply-To: <20251015062728.60104-1-hch@lst.de>
On 2025/10/15 15:27, Christoph Hellwig wrote:
> Hi all,
>
> The relatively low minimal writeback size of 4MiB leads means that
> written back inodes on rotational media are switched a lot. Besides
> introducing additional seeks, this also can lead to extreme file
> fragmentation on zoned devices when a lot of files are cached relative
> to the available writeback bandwidth.
>
> Add a superblock field that allows the file system to override the
> default size, and set it to the zone size for zoned XFS.
For the series:
Tested-by: Damien Le Moal <dlemoal@kernel.org>
--
Damien Le Moal
Western Digital Research
prev parent reply other threads:[~2025-10-15 7:11 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-15 6:27 allow file systems to increase the minimum writeback chunk size Christoph Hellwig
2025-10-15 6:27 ` [PATCH 1/3] writeback: cleanup writeback_chunk_size Christoph Hellwig
2025-10-15 7:05 ` Damien Le Moal
2025-10-15 15:48 ` Darrick J. Wong
2025-10-20 9:34 ` Jan Kara
2025-10-15 6:27 ` [PATCH 2/3] writeback: allow the file system to override MIN_WRITEBACK_PAGES Christoph Hellwig
2025-10-15 7:09 ` Damien Le Moal
2025-10-15 7:27 ` Christoph Hellwig
2025-10-15 15:13 ` Theodore Ts'o
2025-10-16 4:33 ` Christoph Hellwig
2025-10-15 15:57 ` Darrick J. Wong
2025-10-16 4:37 ` Christoph Hellwig
2025-10-15 20:49 ` Dave Chinner
2025-10-16 4:39 ` Christoph Hellwig
2025-10-16 8:23 ` Dave Chinner
2025-10-15 6:27 ` [PATCH 3/3] xfs: set s_min_writeback_pages for zoned file systems Christoph Hellwig
2025-10-15 7:10 ` Damien Le Moal
2025-10-15 16:01 ` Darrick J. Wong
2025-10-15 7:11 ` Damien Le Moal [this message]
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