diff --git a/openstack/passthrough.md b/openstack/passthrough.md
index 59f7271..3d2e06c 100644
--- a/openstack/passthrough.md
+++ b/openstack/passthrough.md
@@ -1,6 +1,6 @@
 # 显卡穿透
 
-
+### https://blog.csdn.net/u012336567/article/details/74743168
 
 ``` bash
 sudo nano /etc/default/grub