Btrfs: Fix split_leaf to avoid incorrect double splits

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index e8466940fa30..53e40b5c084d 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1865,7 +1865,11 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
                                 return ret;
                         }
                         mid = slot;
-                        double_split = 1;
+                        if (mid != nritems &&
+                            leaf_space_used(l, mid, nritems - mid) +
+                            space_needed > BTRFS_LEAF_DATA_SIZE(root)) {
+                                double_split = 1;
+                        }
                 }
         }
         nritems = nritems - mid;