Btrfs: don't auto defrag a file when doing directIO

If we runt the direct IO, we should not run auto defrag, because it may
introduce buffered IO vs direcIO problem, and make direct IO slow down.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 657f16d9c78b38ba6a425ec0a3e53dc591dd5ec9..bf609581c5d040102a2bd0694150629988b45084 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5692,9 +5692,6 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode,
        if (IS_ERR(trans))
                return ERR_CAST(trans);
 
-       if (start <= BTRFS_I(inode)->disk_i_size && len < 64 * 1024)
-               btrfs_add_inode_defrag(trans, inode);
-
        trans->block_rsv = &root->fs_info->delalloc_block_rsv;
 
        alloc_hint = get_extent_allocation_hint(inode, start, len);