xfs: add inode to zone caching for data placement

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Placing data from the same file in the same zone is a great heuristic
for reducing write amplification and we do this already - but only
for sequential writes.

To support placing data in the same way for random writes, reuse the
xfs mru cache to map inodes to open zones on first write. If a mapping
is present, use the open zone for data placement for this file until
the zone is full.

Signed-off-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

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Hans Holmberg 2025-05-14 10:50:37 +00:00 • committed by Carlos Maiolino

parent 70b95cb865

commit f3e2e53823

2 changed files with 110 additions and 0 deletions

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1

fs/xfs/xfs_mount.h

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109

fs/xfs/xfs_zone_alloc.c

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