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[Xen-users] Building domain from scratch

Hi all,

I have been working with VMware for a while but am a newbie in Xen.  I've 
installed xen-3.0 and tested the result with ttylinux successfully.  Now, I am 
trying to build a virtual machine from scratch but kernel panics with the 
following messages when starting new domain:

xentest >xm create -c xm-rhel4
Using config file "xm-rhel4".
Started domain rhel4
Linux version 2.6.16-xen (xenod@xxxxxxxxxxxxxxxxxxxxx) (gcc version 3.3.3 
20040412 (Red Hat Linux 3.3.3-7)) #1 SMP Thu Apr 13 18:46:07 BST 2006
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000020000000 (usable)
0MB HIGHMEM available.
520MB LOWMEM available.
ACPI in unprivileged domain disabled
IRQ lockup detection disabled
Built 1 zonelists
Kernel command line:
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 65536 bytes)
Xen reported: 2660.168 MHz processor.
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Software IO TLB disabled
vmalloc area: e1000000-fb7fe000, maxmem 33ffe000
Memory: 513024k/532480k available (2183k kernel code, 10884k reserved, 730k 
data, 172k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 5357.52 BogoMIPS (lpj=26787640)
Security Framework v1.0.0 initialized
Capability LSM initialized
Mount-cache hash table entries: 512
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 512K
Checking 'hlt' instruction... OK.
Brought up 1 CPUs
checking if image is initramfs... it is
Freeing initrd memory: 1142k freed
Grant table initialized
NET: Registered protocol family 16
Brought up 1 CPUs
PCI: setting up Xen PCI frontend stub
ACPI: Subsystem revision 20060127
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
xen_mem: Initialising balloon driver.
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: System does not support PCI
PCI: System does not support PCI
IA-32 Microcode Update Driver: v1.14-xen <tigran@xxxxxxxxxxx>
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
Xen virtual console successfully installed as tty1
Event-channel device installed.
blkif_init: reqs=64, pages=704, mmap_vstart=0xdf800000
vbd vbd-768: 2 reading virtual-device
vbd vbd-768: 2 xenbus_dev_probe on device/vbd/768
netfront: Initialising virtual ethernet driver.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
ide-floppy driver 0.99.newide
usbmon: debugfs is not available
usbcore: registered new driver libusual
mice: PS/2 mouse device common for all mice
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
NET: Registered protocol family 8
NET: Registered protocol family 20
Using IPI No-Shortcut mode
Freeing unused kernel memory: 172k freed
Red Hat nash version 4.1.18 starting
Mounted /proc filesystem
Mounting sysfs
Creating /dev
Starting udev
Loading scsi_mod.ko module
scsi_mod: no version for "struct_module" found: kernel tainted.
SCSI subsystem initialized
Loading sd_mod.ko module
Loading libata.ko module
Loading ata_piix.ko module
Loading jbd.ko module
Loading ext3.ko module
Loading aacraid.ko module
Adaptec aacraid driver (1.1-4 Apr 13 2006 18:11:14)
Creating root device
Mounting root filesystem
mount: error 6 mounting ext3
mount: error 2 mounting none
Switching to new root
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!
xentest >

Xm-rhel4 config file looks like this:

xentest >cat xm-rhel4
kernel = "/boot/vmlinuz-2.6-xen"
ramdisk = "/boot/initrd-2.6-xen.img"
memory = 512
name = "rhel4"
vif = [ '' ]
disk = [ 'file:/xm/images/rhel4.img,ioemu:hda,w' ]
#root = "/dev/hda ro"
xentest >

Is there a documentation that defines error messages?  Is it possible to build 
a domain from scratch with Xen?

Any help would be appreciated.


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