1 files changed, 8 insertions, 1 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 955204ca0447..a83d486cc70c 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -167,6 +167,9 @@ loop:
 
         spin_lock_init(&cur_trans->commit_lock);
         spin_lock_init(&cur_trans->delayed_refs.lock);
+        atomic_set(&cur_trans->delayed_refs.procs_running_refs, 0);
+        atomic_set(&cur_trans->delayed_refs.ref_seq, 0);
+        init_waitqueue_head(&cur_trans->delayed_refs.wait);
 
         INIT_LIST_HEAD(&cur_trans->pending_snapshots);
         INIT_LIST_HEAD(&cur_trans->ordered_operations);
@@ -637,7 +640,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
         if (!list_empty(&trans->new_bgs))
                 btrfs_create_pending_block_groups(trans, root);
 
-        while (count < 2) {
+        while (count < 1) {
                 unsigned long cur = trans->delayed_ref_updates;
                 trans->delayed_ref_updates = 0;
                 if (cur &&
@@ -649,6 +652,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
                 }
                 count++;
         }
+
         btrfs_trans_release_metadata(trans, root);
         trans->block_rsv = NULL;
 
@@ -744,7 +748,9 @@ int btrfs_write_marked_extents(struct btrfs_root *root,
         struct extent_state *cached_state = NULL;
         u64 start = 0;
         u64 end;
+        struct blk_plug plug;
 
+        blk_start_plug(&plug);
         while (!find_first_extent_bit(dirty_pages, start, &start, &end,
                                       mark, &cached_state)) {
                 convert_extent_bit(dirty_pages, start, end, EXTENT_NEED_WAIT,
@@ -758,6 +764,7 @@ int btrfs_write_marked_extents(struct btrfs_root *root,
         }
         if (err)
                 werr = err;
+        blk_finish_plug(&plug);
         return werr;
 }