diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 8971370..4435bec 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -435,6 +435,7 @@
 		}
 
 		spin_unlock_irqrestore(&bucket->lock, flags);
+		cond_resched();
 	}
 }
 EXPORT_SYMBOL(debug_dma_dump_mappings);