Re: [Xen-users] Xen3, domainU: kernel panic

[Ted Kaczmarek <tedkaz@xxxxxxxxxxxxx>]

On Mon, 2005-10-17 at 18:30 +0200, Fred Blaise wrote:
> 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
> 

Never tried using md0, try using something like sda1 instead, zombies
are not intended to go away AFAIK.

Regrds,
Ted


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