Btrfs: remove unnecessary filemap writting and waiting after block group relocation

We have commited transaction before, remove redundant filemap writting and
waiting here, it can speed up balance relocation process.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 63708f77c8e06e1b2d75040e9c5aa58cbc212f87..d8a82b8499878c0d0b6f486c94634cf7c74142e7 100644 (file)
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -4283,11 +4283,6 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
                }
        }
 
-       filemap_write_and_wait_range(fs_info->btree_inode->i_mapping,
-                                    rc->block_group->key.objectid,
-                                    rc->block_group->key.objectid +
-                                    rc->block_group->key.offset - 1);
-
        WARN_ON(rc->block_group->pinned > 0);
        WARN_ON(rc->block_group->reserved > 0);
        WARN_ON(btrfs_block_group_used(&rc->block_group->item) > 0);