--- a/fs/direct-io.c
+++ i/fs/direct-io.c
@@ -571,7 +571,7 @@ int sb_init_dio_done_wq(struct super_blo
 {
 	struct workqueue_struct *old;
 	struct workqueue_struct *wq = alloc_workqueue("dio/%s",
-						      WQ_MEM_RECLAIM, 0,
+					 WQ_UNBOUND | WQ_MEM_RECLAIM, WQ_UNBOUND_MAX_ACTIVE,
 						      sb->s_id);
 	if (!wq)
 		return -ENOMEM;