WhyCan Forum(哇酷开发者社区)

[  109.925015] VFS: Unable to mount root fs via NFS, trying floppy.
[  109.931869] VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6
[  109.939215] Please append a correct "root=" boot option; here are the available partitions:
[  109.947607] b300        15558144 mmcblk0
[  109.947614]  driver: mmcblk
[  109.954439]   b301           32768 mmcblk0p1 d85b0d94-01
[  109.954441]
[  109.961244]   b302        15523840 mmcblk0p2 d85b0d94-02
[  109.961246]
[  109.968066] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[  109.976332] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.14.14-licheepi-zero+ #1
[  109.983637] Hardware name: Allwinner sun8i Family
[  109.988380] [<c010e894>] (unwind_backtrace) from [<c010b548>] (show_stack+0x10/0x14)
[  109.996135] [<c010b548>] (show_stack) from [<c06732e8>] (dump_stack+0x88/0x9c)
[  110.003367] [<c06732e8>] (dump_stack) from [<c011b848>] (panic+0xdc/0x248)
[  110.010249] [<c011b848>] (panic) from [<c09011dc>] (mount_block_root+0x18c/0x260)
[  110.017736] [<c09011dc>] (mount_block_root) from [<c09013d0>] (mount_root+0x120/0x128)
[  110.025655] [<c09013d0>] (mount_root) from [<c0901528>] (prepare_namespace+0x150/0x194)
[  110.033661] [<c0901528>] (prepare_namespace) from [<c0900e28>] (kernel_init_freeable+0x1c4/0x1d4)
[  110.042537] [<c0900e28>] (kernel_init_freeable) from [<c06854a0>] (kernel_init+0x8/0x108)
[  110.050719] [<c06854a0>] (kernel_init) from [<c0107868>] (ret_from_fork+0x14/0x2c)
[  110.058301] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

setenv bootargs 'console=tty1 console=ttyS0,115200 root=/dev/nfs rw nfsroot=192.168.3.3:/home/qiushan/linux/nfs/ubuntu_rootfs ip=192.168.3.4:192.168.3.3:192.168.3.1:255.255.255.0::eth0:off'