NFS挂载根目录卡在random: nonblocking pool is initialized

懒人匠师

开发指南第三十八章-38.3根文件系统初步测试，出现问题。SecureCRT终端信息表面根文件已挂载，但是最终卡在random: nonblocking pool is initialized，没有继续运行。
终端信息：

1. fec 20b4000.ethernet eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=20b4000.ethernet:01, irq=-1)
   
2. IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
   
3. fec 20b4000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
   
4. IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
   
5. IP-Config: Complete:
   
6.      device=eth0, hwaddr=00:04:9f:04:d2:35, ipaddr=192.168.214.50, mask=255.255.255.0, gw=192.168.214.1
   
7.      host=192.168.214.50, domain=, nis-domain=(none)
   
8.      bootserver=192.168.214.30, rootserver=192.168.214.30, rootpath=
   
9. can-3v3: disabling
   
10. ALSA device list:
    
11.   No soundcards found.
    
12. VFS: Mounted root (nfs filesystem) on device 0:15.
    
13. devtmpfs: mounted
    
14. Freeing unused kernel memory: 480K (8090e000 - 80986000)
    
15. request_module: runaway loop modprobe binfmt-464c
    
16. Starting init: /sbin/init exists but couldn't execute it (error -8)
    
17. request_module: runaway loop modprobe binfmt-464c
    
18. Starting init: /bin/sh exists but couldn't execute it (error -8)
    
19. Kernel panic - not syncing: No working init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
    
20. ---[ end Kernel panic - not syncing: No working init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
    
21. random: nonblocking pool is initialized

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我的环境变量配置：

1. bootargs=console=ttymxc0,115200 root=/dev/nfs rw nfsroot=192.168.214.30:/home/liangchanghao/linux/nfs/rootfs ip=192.168.214.50:192.168.214.30:192.168.214.1:255.255.255.0::eth0:off

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我的分析：
1、在前面的37.2.3linux内核启动测试是成功的，当时是用了EMMC里面的根文件
说明：NFS 下载没有问题，Uboot linux内核以及.dtb设备文件没有问题。
2、启动挂载NFS根目录时，打印的信息中出现了，VFS: Mounted root (nfs filesystem) on device 0:15.
说明，已经挂载成功了，环境变量应该没有输错。
3、根据最后出现的报错信息推断，

1. Starting init: /sbin/init exists but couldn't execute it (error -8)
   
2. request_module: runaway loop modprobe binfmt-464c
   
3. Starting init: /bin/sh exists but couldn't execute it (error -8)
   
4. Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
   
5. ---[ end Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
   
6. random: nonblocking pool is initialized

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出错原因是Linux内核无法执行init这个文件。既然能找到文件，并提示无法执行应该是权限问题或者配置问题。按照教程检查了一遍根文件的配置，并没有找出问题。


求助各位出现过类似问题的提供一下思路！

懒人匠师

是文件格式不对了，在rootfs目录下查看 file bin/busybox。发现文件是X86的64位。

检查了下，是busybox编译时，手册里给的Makefile参考多了个问号，导致编译不对。

1. 164 CROSS_COMPILE ?= /usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-

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去掉问号重新编译，查看文件，是32位的了。重新运行，一切正常。

仰望星空之云

感谢分享

Nix5i

怎么看文件是哪个平台的多少位啊

luoshanxuli2010

我也是出现这个问题 不知道是什么原因。emmc 烧录没有问题 。通过命令行挂载起来就出现如上错。
[  102.871796] VFS: Unable to mount root fs via NFS, trying floppy.
[  102.878743] VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6
[  102.886106] Please append a correct "root=" boot option; here are the available partitions:
[  102.894544] 0100           65536 ram0  (driver?)
[  102.899191] 0101           65536 ram1  (driver?)
[  102.903919] 0102           65536 ram2  (driver?)
[  102.908562] 0103           65536 ram3  (driver?)
[  102.913202] 0104           65536 ram4  (driver?)
[  102.917897] 0105           65536 ram5  (driver?)
[  102.922539] 0106           65536 ram6  (driver?)
[  102.927227] 0107           65536 ram7  (driver?)
[  102.931868] 0108           65536 ram8  (driver?)
[  102.936537] 0109           65536 ram9  (driver?)
[  102.941176] 010a           65536 ram10  (driver?)
[  102.945925] 010b           65536 ram11  (driver?)
[  102.950653] 010c           65536 ram12  (driver?)
[  102.955432] 010d           65536 ram13  (driver?)
[  102.960159] 010e           65536 ram14  (driver?)
[  102.964911] 010f           65536 ram15  (driver?)
[  102.969649] b300         7634944 mmcblk1  driver: mmcblk
[  102.975010]   b301          131072 mmcblk1p1 68412317-01
[  102.980344]   b302         7493632 mmcblk1p2 68412317-02
[  102.985700] b318             512 mmcblk1rpmb  (driver?)
[  102.990950] b310            4096 mmcblk1boot1  (driver?)
[  102.996306] b308            4096 mmcblk1boot0  (driver?)
[  103.001640] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[  103.009917] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[  118.433700] random: nonblocking pool is initialized


U-Boot 2016.03-g0ae7e33 (Aug 14 2022 - 19:42:45 +0800)