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Commit 5f9268ca authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Dave Chinner
Browse files

xfs: don't bother looking at the refcount tree for reads 



There is no need to trim an extent into a shared or non-shared one, or
report any flags for plain old reads.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent 62c5ac89

fs/xfs/xfs_iomap.c

+8 −5
Original line number Diff line number Diff line
@@ -996,12 +996,15 @@ xfs_file_iomap_begin( 
		return error;

	}



	if (flags & (IOMAP_WRITE | IOMAP_ZERO | IOMAP_REPORT)) {

		/* Trim the mapping to the nearest shared extent boundary. */

	error = xfs_reflink_trim_around_shared(ip, &imap, &shared, &trimmed);

		error = xfs_reflink_trim_around_shared(ip, &imap, &shared,

				&trimmed);

		if (error) {

			xfs_iunlock(ip, lockmode);

			return error;

		}

	}



	if ((flags & IOMAP_WRITE) && imap_needs_alloc(inode, &imap, nimaps)) {

		/*