Btrfs: wake up delayed ref flushing waiters on abort

I hit a deadlock because we aborted when flushing delayed refs but didn't wake
any of the other flushers up and so everybody was just sleeping forever.  This
should fix the problem.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index f84d53bc2f5d4ad397f866d8f60a9da7c671ab6a..ca1893edda523a6dc765a1818bb22c6570bb7b9d 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2629,6 +2629,7 @@ again:
                        spin_unlock(&delayed_refs->lock);
                        btrfs_abort_transaction(trans, root, ret);
                        atomic_dec(&delayed_refs->procs_running_refs);
+                       wake_up(&delayed_refs->wait);
                        return ret;
                }