xfs: reduce context switches for synchronous buffered I/O

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Currently all metadata I/O completions happen in the m_buf_workqueue
workqueue.  But for synchronous I/O (i.e. all buffer reads) there is no
need for that, as there always is a called in process context that is
waiting for the I/O.  Factor out the guts of xfs_buf_ioend into a
separate helper and call it from xfs_buf_iowait to avoid a double
an extra context switch to the workqueue.

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

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Christoph Hellwig 2025-02-24 15:48:52 -08:00 • committed by Carlos Maiolino

parent 2d873efd17

commit 4b90de5bc0

1 changed files with 27 additions and 16 deletions

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fs/xfs/xfs_buf.c

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