btrfs: skip LOOP_NO_EMPTY_SIZE if not clustered allocation

LOOP_NO_EMPTY_SIZE is solely dedicated for clustered allocation. So, we
can skip this stage and give up the allocation.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index bcffb96..1d895df 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3835,6 +3835,9 @@ static int find_free_extent_update_loop(struct btrfs_fs_info *fs_info,
                }
 
                if (ffe_ctl->loop == LOOP_NO_EMPTY_SIZE) {
+                       if (ffe_ctl->policy != BTRFS_EXTENT_ALLOC_CLUSTERED)
+                               return -ENOSPC;
+
                        /*
                         * Don't loop again if we already have no empty_size and
                         * no empty_cluster.