5.23 下午 外教口语课 阅读一篇

 

device=eth0, addr=192.168.167.15, mask=255.255.255.0, gw=192.168.167.254,

     host=192.168.167.15, domain=, nis-domain=(none),

     bootserver=192.168.167.170, rootserver=192.168.167.170, rootpath=

Looking up port of RPC 100003/2 on 192.168.167.170

Root-NFS: Unable to get nfsd port number from server, using default

Looking up port of RPC 100005/1 on 192.168.167.170

Root-NFS: Unable to get mountd port number from server, using default

mount: server 192.168.167.170 not responding, timed out

Root-NFS: Server returned error -5 while mounting /work/nfs/rootfs_bluetooth_omap

VFS: Unable to mount root fs via NFS, trying floppy.

VFS: Cannot open root device "nfs" or unknown-block(2,0)

Please append a correct "root=" boot option

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

 

问题原因：这种情况通常是nfs配置问题。

确

认uboot的bootargs参数里和nfs相关的ip地址信息设置是否正确，以及Host机/etc/exports配置无误，重起nfs服务,重新

尝试连接。另外还需要注意bootargs内console和mem两个参数的设置。kernel2.6后console最好设置为

ttySAC0，mem也要根据开发板实际情况设置正确。

 

5.文件系统不能启动问题

eth0: link up

IP-Config: Complete:

      device=eth0, addr=192.168.167.15, mask=255.255.255.0, gw=192.168.167.254,

     host=192.168.167.15, domain=, nis-domain=(none),

     bootserver=192.168.167.170, rootserver=192.168.167.170, rootpath=

Looking up port of RPC 100003/2 on 192.168.167.170

Looking up port of RPC 100005/1 on 192.168.167.170

VFS: Mounted root (nfs filesystem).

Freeing init memory: 128K

/sbin/initKernel panic - not syncing: Attempted to kill init!

 

问题原因：制作的文件系统缺少运行busybox所需的libcrypt.so库，新版本会有缺库提示，老版本(1.60)没有。

注：运行一个busybox文件系统至少需要如下几个库：

ld-linux.so.x

libc.so.6

libcrypt.so.x

较新版本的busybox可能还需要

libm.so.6

libgcc_s.so.x

(x为版本号）