而且自己以前用64M板子提供的busybox制作的一个简易的文件系统（没有网络没有qt界面，只有一个串口的shell），放到64M板子上能用，放到128M的板子上不能用。
串口打印如下
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
s3c2410-rtc s3c2410-rtc: hctosys: invalid date/time
FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will !
yaffs: dev is 32505858 name is "mtdblock2"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.2, "mtdblock2"
yaffs: auto selecting yaffs2
block 3 is bad
block 4 is bad
block 5 is bad
block 6 is bad
block 7 is bad
block 8 is bad
block 9 is bad
block 11 is bad
block 12 is bad
block 13 is bad
block 14 is bad
block 15 is bad
block 16 is bad
block 17 is bad
block 18 is bad
block 19 is bad
block 20 is bad
block 21 is bad
block 22 is bad
block 23 is bad
block 24 is bad
block 25 is bad
block 26 is bad
block 27 is bad
block 28 is bad
block 29 is bad
block 30 is bad
block 31 is bad
block 32 is bad
block 33 is bad
block 34 is bad
block 35 is bad
block 36 is bad
block 37 is bad
block 38 is bad
block 39 is bad
block 40 is bad
block 41 is bad
block 42 is bad
block 43 is bad
block 44 is bad
block 45 is bad
block 46 is bad
block 47 is bad
block 48 is bad
block 49 is bad
block 50 is bad
block 53 is bad
block 54 is bad
block 55 is bad
block 56 is bad
block 57 is bad
block 58 is bad
block 59 is bad
block 60 is bad
block 62 is bad
block 63 is bad
block 64 is bad
block 65 is bad
block 66 is bad
block 67 is bad
block 68 is bad
block 69 is bad
block 70 is bad
block 71 is bad
block 72 is bad
block 73 is bad
uncorrectable error : <3>uncorrectable error : <3>uncorrectable error : <3>uncod
**>> yaffs write required 2 attempts
uncorrectable error : <3>uncorrectable error : <3>uncorrectable error : <3>unco0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 124K
Warning: unable to open an initial console.
Failed to execute /linuxrc. Attempting defaults...
Kernel panic - not syncing: No init found. Try passing init= option to kernel.
但是放到64M板子上就能用
