xfs: only iget the file once when doing vectored scrub-by-handle

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If a program wants us to perform a scrub on a file handle and the fd
passed to ioctl() is not the file referenced in the handle, iget the
file once and pass it into the scrub code.  This amortizes the untrusted
iget lookup over /all/ the scrubbers mentioned in the scrubv call.

When running fstests in "rebuild all metadata after each test" mode, I
observed a 10% reduction in runtime on account of avoiding repeated
inobt lookups.

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

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Darrick J. Wong 2024-04-22 09:48:26 -07:00

parent b27ce0da60

commit 4ad350ac58

1 changed files with 45 additions and 0 deletions

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fs/xfs/scrub/scrub.c

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