Re: [Qemu-devel] Welcome to the "Qemu-devel" mailing list (Digest mode)

[Max Filippov]

> Dear,
>     Is anyone can help me? I'm deeply in trouble. I want boot by kernel by
> qemu, i want boot from dhcp, but i got error,
> i have no idea on this, two days... i cannot find the solution. Anyone knows
> why? Thanks very much.

[...]

> bellow is kernel error message:
>
> [   13.087298] VFS: Cannot open root device "(null)" or unknown-block(8,1)
> [   13.089471] Please append a correct "root=" boot option; here are the
> available partitions:

It says that the booted kernel haven't found its rootfs. I guess that
you 'append' line is missing 'root=/dev/nfs'.
Probably this would help: http://tldp.org/HOWTO/NFS-Root-4.html#ss4.5

> [   13.092270] 0b00         1048575 sr0 driver: sr
> [   13.093812] Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(8,1)
> [   13.096596] Pid: 1, comm: swapper Not tainted 2.6.35.13_nl-pc+ #1
> [   13.098611] Call Trace:
> [   13.098958]  [<c1030bf9>] panic+0x7f/0x100
> [   13.099558]  [<c1791c95>] mount_block_root+0x156/0x165
> [   13.100271]  [<c1002931>] ? sysenter_past_esp+0x4e/0x57
> [   13.100978]  [<c1791d0a>] mount_root+0x66/0x84
> [   13.101606]  [<c1791e73>] prepare_namespace+0x14b/0x172
> [   13.102363]  [<c1791630>] kernel_init+0x1ad/0x1bc
> [   13.103031]  [<c1791483>] ? kernel_init+0x0/0x1bc
> [   13.103674]  [<c1002eb6>] kernel_thread_helper+0x6/0x10
>
>

-- 
Thanks.
-- Max