xen domu hangs on boot:Freeing unused kernel memory: 200k freed

xen启动domu时，停止在

Freeing unused kernel memory: 200k freed

配置文件为：

vcpus = 1
kernel = "/boot/vmlinuz-2.6.18.8-xen"
memory = 64
name = "sf-vmimg"
vif = ['mac=02:00:02:ff:ff:fd']
disk = ['file:/etc/snowflock/router/router.img,sda1,w']

 

此时无法启动终端登录domu，在配置文件中加：

extra= 'xencons=tty'
或者extra = '2 console=xvc0'

即可成功启动domu。