diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c
--- a/sys/kern/vfs_vnops.c
+++ b/sys/kern/vfs_vnops.c
@@ -3519,6 +3519,8 @@
 				mp = NULL;
 			}
 		}
+		if (error == 0 && len != 0)
+			maybe_yield();
 	}
 out:
 	if (rl_cookie != NULL)