xfs: add lockless xfs_buf_readahead_map fast path

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Readahead currently always locks the buffer, which can cause contention
with actual users of the buffer.  Add a fast path without taking any
locks if the buffer is uptodate and not stale.

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

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Christoph Hellwig 2026-07-15 16:51:05 +02:00 • committed by Carlos Maiolino

parent 2aedf844be

commit 00f40876f4

1 changed files with 13 additions and 3 deletions

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fs/xfs/xfs_buf.c

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