I was trying to run Linux inside a Vancouver virtual machine and using a virtual disk.

But, I got an error when Linux kernel try to mount the root file system.

I tested the Linux kernel and the virtual disk image using Qemu and it worked well.

I was also able to start the same Linux kernel on Vancouver but by providing an initrd ramfs file.

Please see below the trace of the linux boot:

(5) # [ 23.652175] VFS: Cannot open root device "(null)" or unknown-block(0,0)

(5) # [ 23.652175] Please append a correct "root=" boot option; here are the availa

(5) # | ble partitions:

(5) # [ 23.652175] Kernel panic - not syncing: VFS: Unable to mount root fs on unkn

(5) # | own-block(0,0)

(5) # [ 23.652175] Pid: 1, comm: swapper/0 Tainted: G W 3.2.16-rt27 #3

(5) # [ 23.652175] Call Trace:

(5) # [ 23.652175] [<c05f5299>] panic+0x66/0x173

(5) # [ 23.652175] [<c0849ca1>] mount_block_root+0x1d3/0x26c

(5) # [ 23.652175] [<c02311bc>] ? sys_mknod+0x2c/0x30

(5) # [ 23.656100] [<c0849d93>] mount_root+0x59/0x5f

(5) # [ 23.656100] [<c0849ee7>] prepare_namespace+0x14e/0x192

(5) # [ 23.656100] [<c0221665>] ? sys_access+0x25/0x30

(5) # [ 23.656100] [<c0849344>] kernel_init+0x13f/0x14e

(5) # [ 23.656100] [<c0849205>] ? parse_early_options+0x25/0x25

(5) # [ 23.656100] [<c05fe6c2>] kernel_thread_helper+0x6/0x10

and this is the script I used to run Vancouver and Linux :

#!/usr/bin/env novaboot

# -*-sh-*-

HYPERVISOR_PARAMS=serial

WVDESC=Kernel compile inside VM (on virtual disk, EPT + VPID)

WVTEST_TIMEOUT=1200

QEMU_FLAGS=-cpu phenom -m 2048M

bin/apps/sigma0.nul tracebuffer_verbose S0_DEFAULT hostserial hostvga hostkeyb:0,0x60,1,12 script_start:1,1 \

service_config vdisk_empty:736870912 service_disk

bin/apps/vancouver.nul

bin/boot/munich

imgs/bzImage

imgs/mdisk.img

vancuver.nulconfig <<EOF

sigma0::mem:512 sigma0::dma name::/s0/log name::/s0/timer name::/s0/fs/rom name::/s0/admission name::/s0/disk disk::0 ||

rom://bin/apps/vancouver.nul PC_PS2 ahci:0xe0800000,14,0x30 drive:0,0,0 ||

rom://bin/boot/munich ||

rom://imgs/bzImage clocksource=tsc console=ttyS0 ||

rom://imgs/mdisk.img

EOF

Could someone tell me how to correct this error.

Or give me some hints to another solution to build a disk image.

I need a disk image in order to add some executable that I already

compiled on my host machine and to run these executable on the Linux

guest OS once it will start on Vancouver VM.

Thank you very much in advance for your help.