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Diffstat (limited to 'fs/btrfs/relocation.c')
-rw-r--r--fs/btrfs/relocation.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 3602806d71bd..9ba92d86da0b 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -1648,6 +1648,7 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
struct btrfs_root_item *root_item;
struct btrfs_path *path;
struct extent_buffer *leaf;
+ int reserve_level;
int level;
int max_level;
int replaced = 0;
@@ -1696,7 +1697,8 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
* Thus the needed metadata size is at most root_level * nodesize,
* and * 2 since we have two trees to COW.
*/
- min_reserved = fs_info->nodesize * btrfs_root_level(root_item) * 2;
+ reserve_level = max_t(int, 1, btrfs_root_level(root_item));
+ min_reserved = fs_info->nodesize * reserve_level * 2;
memset(&next_key, 0, sizeof(next_key));
while (1) {