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See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam05 X-Stat-Signature: ygjrodfsmtcz66uy8i51m1gt5c8gzunu X-Rspam-User: X-Rspamd-Queue-Id: 7AF81100005 X-HE-Tag: 1760672782-579119 X-HE-Meta: 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 ttWhg6Jy 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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. Changes since v1: - covert the field to a long to match other related writeback code - cap the zone XFS writeback size to the maximum extent size - write an extensive comment about the tradeoffs of setting the value - fix a commit message typo Diffstat: fs/fs-writeback.c | 26 +++++++++----------------- fs/super.c | 1 + fs/xfs/xfs_zone_alloc.c | 28 ++++++++++++++++++++++++++-- include/linux/fs.h | 1 + include/linux/writeback.h | 5 +++++ 5 files changed, 42 insertions(+), 19 deletions(-)