新版内核nfs不能挂载问题，请各位指点

bxd_linux 2018-12-07 03:53:14

加精

这个问题困扰我许久，是我非常难受
我用的debian9.4.9的服务器，开发板内核是4.19的
服务器可以正常mount -t nfs 挂载，u-boot不能通过nfs命令下载内核，
而且服务器日志里面也有开发板mount的请求，只是没有回应



Dec  7 15:31:47 Debian9 rpc.mountd[61537]: authenticated mount request from 192.168.2.3:913 for /home/linux/nfs/rootfs (/home/linux/nfs)

Dec  7 15:31:52 Debian9 rpc.mountd[61537]: authenticated mount request from 192.168.2.3:798 for /home/linux/nfs/rootfs (/home/linux/nfs)

Dec  7 15:32:02 Debian9 rpc.mountd[61537]: authenticated mount request from 192.168.2.3:805 for /home/linux/nfs/rootfs (/home/linux/nfs)

Dec  7 15:32:22 Debian9 rpc.mountd[61537]: authenticated mount request from 192.168.2.3:904 for /home/linux/nfs/rootfs (/home/linux/nfs)

Dec  7 15:32:52 Debian9 rpc.mountd[61537]: authenticated mount request from 192.168.2.3:719 for /home/linux/nfs/rootfs (/home/linux/nfs)

Dec  7 15:33:22 Debian9 rpc.mountd[61537]: authenticated mount request from 192.168.2.3:909 for /home/linux/nfs/rootfs (/home/linux/nfs)

内核配置

主要是内核不能挂载nfsroot,一直是这个错误



 IP-Config: Guessing netmask 255.255.255.0

IP-Config: Complete:

     device=eth0, hwaddr=00:60:6e:33:44:55, ipaddr=192.168.2.3, mask=255.255.255.0, gw=255.255.255.255

     host=192.168.2.3, domain=, nis-domain=(none)

     bootserver=255.255.255.255, rootserver=192.168.2.2, rootpath=

ALSA device list:

  No soundcards found.

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

VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6

Please append a correct "root=" boot option; here are the available partitions:

0100           65536 ram0

 (driver?)

0101           65536 ram1

 (driver?)

0102           65536 ram2

 (driver?)

0103           65536 ram3

 (driver?)

0104           65536 ram4

 (driver?)

0105           65536 ram5

 (driver?)

0106           65536 ram6

 (driver?)

0107           65536 ram7

 (driver?)

0108           65536 ram8

 (driver?)

0109           65536 ram9

 (driver?)

010a           65536 ram10

 (driver?)

010b           65536 ram11

 (driver?)

010c           65536 ram12

 (driver?)

010d           65536 ram13

 (driver?)

010e           65536 ram14

 (driver?)

010f           65536 ram15

 (driver?)

1f00             256 mtdblock0

 (driver?)

1f01             128 mtdblock1

 (driver?)

1f02             128 mtdblock2

 (driver?)

1f03            4096 mtdblock3

 (driver?)

1f04          257536 mtdblock4

 (driver?)

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

CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.0-rc3 #6

Hardware name: SMDK2440

[<c0010654>] (unwind_backtrace) from [<c000dc18>] (show_stack+0x10/0x18)

[<c000dc18>] (show_stack) from [<c051f4dc>] (dump_stack+0x18/0x24)

[<c051f4dc>] (dump_stack) from [<c0019bc4>] (panic+0xc0/0x25c)

[<c0019bc4>] (panic) from [<c067c214>] (mount_block_root+0x1b4/0x2ac)

[<c067c214>] (mount_block_root) from [<c067c570>] (mount_root+0x114/0x158)

[<c067c570>] (mount_root) from [<c067c70c>] (prepare_namespace+0x158/0x1b0)

[<c067c70c>] (prepare_namespace) from [<c067be60>] (kernel_init_freeable+0x180/0x1cc)

[<c067be60>] (kernel_init_freeable) from [<c05343e8>] (kernel_init+0x8/0xf8)

[<c05343e8>] (kernel_init) from [<c00090e0>] (ret_from_fork+0x14/0x34)

Exception stack(0xc3833fb0 to 0xc3833ff8)

3fa0:                                     00000000 00000000 00000000 00000000

3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

3fe0: 00000000 00000000 00000000 00000000 00000013 00000000

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

random: crng init done