[Xen-devel] can't start domU via NFS

[Anatoly Asviyan <aanatoly@xxxxxxxxxxxx>]

        hi all
I have Xen-2.0 setup with dom0 starting from local disk.
I need to start domU from NFS
The NFS server works - both local and remote clients can use it.
But not domU :-(

Here is my config
======= /etc/xen/ttylinux-1 =========
kernel = "/boot/vmlinuz-2.6.9-xenU"
memory = 64
name = "ttylinux-1"
nics=1
ip = "192.168.1.1"
netmask="255.255.0.0"
gateway="192.168.1.123"
root = "/dev/nfs"
nfs_server = "192.168.1.123"
nfs_root   = '/tmp/nfsexport/ttylinux-1'
extra = "4"
======================================

domU starts booting and hangs at mounting its root via NFS


========= boot log ==============
Using config file "ttylinux-1".
Started domain ttylinux-1, console on port 9611
************ REMOTE CONSOLE: CTRL-] TO QUIT ********
Linux version 2.6.9-xenU (xenod@xxxxxxxxxxxxxxxxxxxxxx) (gcc version 3.2.2 
20030222 (Red Hat Linux 3.2.2-5)) #1 Wed Nov 17 22:29:37 GMT 2004
BIOS-provided physical RAM map:                             
 Xen: 0000000000000000 - 0000000004000000 (usable)
64MB LOWMEM available.                            
DMI not present.      
Built 1 zonelists
Kernel command line:  
ip=192.168.1.1:192.168.1.123:192.168.1.123:255.255.0.0::eth0:off root=/dev/nfs 
nfsroot=192.168.1.123:/tmp/nfsexport/ttylinux-1 4
Initializing CPU#0                                                    
PID hash table entries: 512 (order: 9, 8192 bytes)
Xen reported: 2791.178 MHz processor.             
Using tsc for high-res timesource    
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)  
Memory: 62436k/65536k available (1596k kernel code, 3060k reserved, 466k data, 
92k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)                  
CPU: Trace cache: 12K uops, L1 D cache: 8K                
CPU: L2 cache: 512K                       
CPU: Intel(R) Xeon(TM) CPU 2.80GHz stepping 09
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... disabled               
NET: Registered protocol family 16    
Initializing Cryptographic API    
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
Xen virtual console successfully installed as tty                    
Event-channel device installed.                  
Starting Xen Balloon driver    
xen_blk: Initialising virtual block device driver
xen_blk: Timeout connecting to device!           
xen_net: Initialising virtual ethernet driver.
NET: Registered protocol family 2             
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 4096 bind 8192)
NET: Registered protocol family 1                       
NET: Registered protocol family 17
IP-Config: Complete:              
      device=eth0, addr=192.168.1.1, mask=255.255.0.0, gw=192.168.1.123,
     host=192.168.1.1, domain=, nis-domain=(none),                      
     bootserver=192.168.1.123, rootserver=192.168.1.123, rootpath=
Looking up port of RPC 100003/2 on 192.168.1.123                  
portmap: server 192.168.1.123 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.1.123                   
portmap: server 192.168.1.123 not responding, timed out
Root-NFS: Unable to get mountd port number from server, using default
mount: server 192.168.1.123 not responding, timed out                
Root-NFS: Server returned error -5 while mounting /tmp/nfsexport/ttylinux-1
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)
 <0>Rebooting in 1 seconds..

-- 
Regards, Anatoly


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