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-rw-r--r--fs/btrfs/ctree.c16
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,