diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 2002d28c5d5b0249b4e6d7cd0813d888738e0580..812523330a78d438e1397b29803f309b8e360211 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -5687,7 +5687,7 @@ static int __init rbd_init(void)
 
 	/*
 	 * The number of active work items is limited by the number of
-	 * rbd devices, so leave @max_active at default.
+	 * rbd devices * queue depth, so leave @max_active at default.
 	 */
 	rbd_wq = alloc_workqueue(RBD_DRV_NAME, WQ_MEM_RECLAIM, 0);
 	if (!rbd_wq) {