[PATCH 6/6] xfs: don't do delayed allocations for uncached buffered writes

[Jens Axboe <axboe@kernel.dk>]

This data is going to be written immediately, so don't bother trying
to do delayed allocation for it.

Suggested-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/xfs/xfs_iomap.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 28e2d1f37267..d0cd4a05d59f 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -847,8 +847,11 @@ xfs_buffered_write_iomap_begin(
 	int			allocfork = XFS_DATA_FORK;
 	int			error = 0;
 
-	/* we can't use delayed allocations when using extent size hints */
-	if (xfs_get_extsz_hint(ip))
+	/*
+	 * Don't do delayed allocations when using extent size hints, or
+	 * if we were asked to do uncached buffered writes.
+	 */
+	if (xfs_get_extsz_hint(ip) || (flags & IOMAP_UNCACHED))
 		return xfs_direct_write_iomap_begin(inode, offset, count,
 				flags, iomap, srcmap);
 
-- 
2.24.1