Xen devel - Nov 2005 - Migration Problems & nfs

Hi.
Perhaps you may help me.

I''m trying to migrate form A to B.
Both Machines are in the same subnet.
A and B are accessable via NFS - share.

Whe i do a migrate on A:  xm migrate 1 148.191.190.3 I can see with xm list
that the machine is also on B now active, on a ist shown via the system name
status: migrate_RedhatLinux4 ....
But suddenly the Machine crashes and then it'' s not anymore on A and on
B.

Whats the Problem.

I also got several problems when i want to start a machine on A but the
files are located on B. So i use NFS. While Booting,  ther occur there
errors.


[root@ingpcxen002 ~]# xm create -c RHEL4
Using config file "/etc/xen/RHEL4".
Started domain RHEL4
Linux version 2.6.12.6-xenU (root@ingpcxen002.ing.de.bic) (gcc version 3.4.4
20050721 (Red Hat 3.4.4-2)) #1 SMP Thu Nov 24 14:16:52 CET 2005
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000008000000 (usable)
0MB HIGHMEM available.
136MB LOWMEM available.
IRQ lockup detection disabled
Built 1 zonelists
Kernel command line:
ip=148.191.190.53:148.191.190.7::255.255.254.0::eth0:off root=/dev/nfs
nfsroot=148.191.190.7:/xen 3
Initializing CPU#0
PID hash table entries: 1024 (order: 10, 16384 bytes)
Xen reported: 930.313 MHz processor.
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
vmalloc area: c9000000-fb7fe000, maxmem 34000000
Memory: 126268k/139264k available (1807k kernel code, 4500k reserved, 488k
data, 136k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Mount-cache hash table entries: 512
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 256K
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking ''hlt'' instruction... disabled
Brought up 1 CPUs
NET: Registered protocol family 16
Brought up 1 CPUs
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.
netfront: Initialising virtual ethernet driver.
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 8Kbytes
TCP established hash table entries: 8192 (order: 5, 131072 bytes)
TCP bind hash table entries: 8192 (order: 4, 98304 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
NET: Registered protocol family 1
NET: Registered protocol family 17
IP-Config: Device `eth0'' not found.
Looking up port of RPC 100003/2 on 148.191.190.7
RPC: sendmsg returned error 101
portmap: RPC call returned error 101
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 148.191.190.7
RPC: sendmsg returned error 101
portmap: RPC call returned error 101
Root-NFS: Unable to get mountd port number from server, using default
RPC: sendmsg returned error 101
mount: RPC call returned error 101
Root-NFS: Server returned error -101 while mounting /xen
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" 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)
 [root@ingpcxen002 ~]#


Thomas Diederich

**************************************************
*  Boehringer Ingelheim Pharma GmbH & Co.KG
*  A Informationsverarbeitung / Diplomant Systemtechnik
*
*  Mail: diederit@ing.boehringer-Ingelheim.com
<mailto:diederit@ing.boehringer-Ingelheim.com> 
*  Phone: +49 (0)6132/77-98151	



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