[Xen-users] Xen3, domainU: kernel panic

[Fred Blaise <chapeaurouge@xxxxxxxxx>]

Hello all

I am trying to launch:

kernel = "/boot/vmlinuz-2.6.12-xenU"
memory = 512
name = "oes1"
disk = [ 'phy:vgdata/lv_xen_oes1,md0,w' ]
dhcp="dhcp"
root = "/dev/md3 ro"
extra = "4"

End result is:
bicolor:~/hg-xen-unstable/xen-unstable.hg # xm list
Name              ID  Mem(MiB)  CPU  VCPUs  State   Time(s)
Domain-0           0       251    0      1  r-----    553.2
Zombie-oes1        1         0    1      1  ----cd      0.4
oes1              54       503    1      1  r-----      1.9

I get:

bicolor:/etc/xen # xm create oes1 -c
Using config file "oes1".
Started domain oes1
Linux version 2.6.12-xenU (root@bicolor) (gcc version 3.3.3 (SuSE
Linux)) #1 SMP
 Mon Oct 17 18:14:07 CEST 2005
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000020000000 (usable)
0MB HIGHMEM available.
512MB LOWMEM available.
IRQ lockup detection disabled
Built 1 zonelists
Kernel command line:  ip=:1.2.3.4::::eth0:dhcp root=/dev/md3 ro 4
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 65536 bytes)
Xen reported: 3065.790 MHz processor.
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
vmalloc area: e0800000-fb7fe000, maxmem 34000000
Memory: 514944k/524288k available (1911k kernel code, 9124k reserved,
584k data,
 152k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Mount-cache hash table entries: 512
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 512K
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... disabled
CPU0: Intel(R) Xeon(TM) CPU 3.06GHz stepping 09
Total of 1 processors activated (6121.06 BogoMIPS).
Brought up 1 CPUs
NET: Registered protocol family 16
xen_mem: Initialising balloon driver.
Grant table initialized
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
Xen virtual console successfully installed as tty1
Event-channel device installed.
xen_blk: Initialising virtual block device driver
xen_net: Initialising virtual ethernet driver.
md: linear personality registered as nr 1
md: raid0 personality registered as nr 2
md: raid1 personality registered as nr 3
md: raid5 personality registered as nr 4
raid5: automatically using best checksumming function: pIII_sse
   pIII_sse  :  2389.200 MB/sec
raid5: using function: pIII_sse (2389.200 MB/sec)
md: multipath personality registered as nr 7
md: faulty personality registered as nr 10
md: md driver 0.90.1 MAX_MD_DEVS=256, MD_SB_DISKS=27
device-mapper: 4.4.0-ioctl (2005-01-12) initialised: dm-devel@xxxxxxxxxx
NET: Registered protocol family 2
IP: routing cache hash table of 2048 buckets, 32Kbytes
TCP established hash table entries: 131072 (order: 9, 2097152 bytes)
TCP bind hash table entries: 65536 (order: 7, 786432 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
NET: Registered protocol family 1
NET: Registered protocol family 17
IP-Config: Incomplete network configuration information.
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
Root-NFS: No NFS server available, giving up.
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "md3" or unknown-block(2,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

While I can shutdown 'oes1', I cannot make Zombie-oes1 go away, even
with xm destroy. A reboot makes it go away.

As you can see above, raid modules are loaded. What am I missing?
which device is unknown-block(2,0) ?

Thanks for the help.

fred

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