A 。选中Executable file formats/Emulations ---> Kernel support for ELF
binaries -----加载运行rootfs 中的程序.
B 。选中Device Drivers --> ATA/ATAPI/MFM/RLL support --> Enhanced
IDE/MFM/RLL disk/cdrom/tape/floppy support
-->Include IDE/ATA-2 DISK support 该项必选否则VFS 错误：kernel panic.
unkown block ....
-->legacy /proc/ide/ support --- 此项可不选
-->generic/default IDE chipset support. ---- 这里选择通用驱动. 也可选择与
自己芯片组相同的驱动。
C。File systems --> Second extended fs support
--> Ext3 journalling file system support
