I would appreciate if anyone can give me an answer. Is it designed to be like this? Detailed situation: The system is ubuntu 11.04 installed in VMware. I notice that ext4_put_super() is called when I unmount a non-root ext4 partition. But it is not when I restart or shutdown the system. Thanksã -- All the best, Zhao Cai -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html