diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-02-18 20:38:46 +0300 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-02-21 18:55:07 +0300 |
| commit | 78f0cc9d55cbe75faccc0135371c45912a34e6ed (patch) | |
| tree | f8c1e87139aba9db8bcdee931b69314e400df369 /fs/xfs/xfs_reflink.c | |
| parent | 60271ab79d40b99ce6cb28d8dc48aa5e9ffb6df3 (diff) | |
| download | linux-78f0cc9d55cbe75faccc0135371c45912a34e6ed.tar.xz | |
xfs: don't use delalloc extents for COW on files with extsize hints
While using delalloc for extsize hints is generally a good idea, the
current code that does so only for COW doesn't help us much and creates
a lot of special cases. Switch it to use real allocations like we
do for direct I/O.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_reflink.c')
| -rw-r--r-- | fs/xfs/xfs_reflink.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 2babc2cbe103..8a5353daf9ab 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -397,7 +397,8 @@ xfs_reflink_allocate_cow( struct xfs_inode *ip, struct xfs_bmbt_irec *imap, bool *shared, - uint *lockmode) + uint *lockmode, + unsigned iomap_flags) { struct xfs_mount *mp = ip->i_mount; xfs_fileoff_t offset_fsb = imap->br_startoff; @@ -471,6 +472,13 @@ xfs_reflink_allocate_cow( if (nimaps == 0) return -ENOSPC; convert: + /* + * COW fork extents are supposed to remain unwritten until we're ready + * to initiate a disk write. For direct I/O we are going to write the + * data and need the conversion, but for buffered writes we're done. + */ + if (!(iomap_flags & IOMAP_DIRECT)) + return 0; return xfs_reflink_convert_cow_extent(ip, imap, offset_fsb, count_fsb); out_unreserve: |