Hi Zheng, Ilya Recently I’ve just tested some mount option of cephfs and found though fscache kernel module was disabled but when I specified -o fsc to mount.ceph there is no any indication of warning or failure. I think it may cause enduser's misunderstanding of fscache function, so I plan to add extra checks to parsing fscache related options in kernel side. There are two approaches as below, could you tell me which will be better? If we get conflict condition about fscache. A. Print error message && Exit mount immediately B. Only print error message but continue mount process. Thanks, Chengguang. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html