diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-02-06 10:50:49 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-02-06 17:47:47 -0800 |
| commit | a14234c72bf41ac96bc8c98e96e2c84b6d4bd4f2 (patch) | |
| tree | 711d321fd0656ef512522b0293a12b836d6afecd /fs/xfs/libxfs | |
| parent | dcf9585a7511147c7ffd580be8580dd39bc52fb6 (diff) | |
xfs: go straight to real allocations for direct I/O COW writes
When we allocate COW fork blocks for direct I/O writes we currently first
create a delayed allocation, and then convert it to a real allocation
once we've got the delayed one.
As there is no good reason for that this patch instead makes use call
xfs_bmapi_write from the COW allocation path. The only interesting bits
are a few tweaks the low-level allocator to allow for this, most notably
the need to remove the call to xfs_bmap_extsize_align for the cowextsize
in xfs_bmap_btalloc - for the existing convert case it's a no-op, but
for the direct allocation case it would blow up our block reservation
way beyond what we reserved for the transaction.
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/libxfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index dcffbb09444e..1cee514de19e 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -2895,13 +2895,14 @@ xfs_bmap_add_extent_hole_real( ASSERT(!isnullstartblock(new->br_startblock)); ASSERT(!bma->cur || !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); - ASSERT(whichfork != XFS_COW_FORK); XFS_STATS_INC(mp, xs_add_exlist); state = 0; if (whichfork == XFS_ATTR_FORK) state |= BMAP_ATTRFORK; + if (whichfork == XFS_COW_FORK) + state |= BMAP_COWFORK; /* * Check and set flags if this segment has a left neighbor. |