1 files changed, 8 insertions, 0 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 1ba2cc58eab5..c8c318494dee 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5159,6 +5159,14 @@ have_block_group:
                 if (unlikely(block_group->ro))
                         goto loop;
 
+                spin_lock(&block_group->tree_lock);
+                if (cached &&
+                    block_group->free_space < num_bytes + empty_size) {
+                        spin_unlock(&block_group->tree_lock);
+                        goto loop;
+                }
+                spin_unlock(&block_group->tree_lock);
+
                 /*
                  * Ok we want to try and use the cluster allocator, so lets look
                  * there, unless we are on LOOP_NO_EMPTY_SIZE, since we will