* Mount Error Message
{{{
$ sudo mount -t lustre /dev/sdb2 /home/mdt/
mount.lustre: mount /dev/sdb2 at /home/mdt failed: No such device
Are the lustre modules loaded?
Check /etc/modprobe.conf and /proc/filesystems
Note 'alias lustre llite' should be removed from modprobe.conf

$ dmesg
LustreError: 13421:0:(router_proc.c:1013:lnet_proc_init()) couldn't create proc entry sys/lnet/stats
lustre: Unknown symbol ll_remove_suid
}}}
 * 解決方法
   * 確認是否有 Kernel option 沒選上：
     * CONFIG_QUOTA
     * CONFIG_SCSI_PROC_FS
     * CONFIG_SD_IOSTATS
   * 找到 function 定義處，加上 EXPORT_SYMBOL(fun_name);