diff options
| -rw-r--r-- | fs/btrfs/ctree.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index d92462fe66c8..f64aad613727 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -1016,19 +1016,21 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, parent_start = parent->start; /* - * If we are COWing a node/leaf from the extent, chunk or device trees, - * make sure that we do not finish block group creation of pending block - * groups. We do this to avoid a deadlock. + * If we are COWing a node/leaf from the extent, chunk, device or free + * space trees, make sure that we do not finish block group creation of + * pending block groups. We do this to avoid a deadlock. * COWing can result in allocation of a new chunk, and flushing pending * block groups (btrfs_create_pending_block_groups()) can be triggered * when finishing allocation of a new chunk. Creation of a pending block - * group modifies the extent, chunk and device trees, therefore we could - * deadlock with ourselves since we are holding a lock on an extent - * buffer that btrfs_create_pending_block_groups() may try to COW later. + * group modifies the extent, chunk, device and free space trees, + * therefore we could deadlock with ourselves since we are holding a + * lock on an extent buffer that btrfs_create_pending_block_groups() may + * try to COW later. */ if (root == fs_info->extent_root || root == fs_info->chunk_root || - root == fs_info->dev_root) + root == fs_info->dev_root || + root == fs_info->free_space_root) trans->can_flush_pending_bgs = false; cow = btrfs_alloc_tree_block(trans, root, parent_start, |