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Re: [Xen-devel] Unable to create a new domain


  • To: yi yang <yangyiyy@xxxxxxxxx>
  • From: nayden <nayden@xxxxxxxxx>
  • Date: Wed, 27 Oct 2004 14:50:33 -0600
  • Cc: Ian Pratt <ian.pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx, maheswar@xxxxxxxxxxxx
  • Delivery-date: Wed, 27 Oct 2004 21:55:39 +0100
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  • List-id: List for Xen developers <xen-devel.lists.sourceforge.net>

Hi, 

I had the same problem last week and it was due to the fact that the
Xen0 kernel didn't by default came with a driver for my hard disc.
The following suggestion by Mark Williamson solved the problem for me. 

"If you have an existing .config for vanilla Linux that works, you should
copy it to xenroot/install/boot/config-2.6.8.1-xen0 then do make world.
This will reuse your existing config options where possible, although it
might need to confirm a few new options with you - just choose the
defaults."

nayden

On Wed, 27 Oct 2004 16:19:24 -0400, yi yang <yangyiyy@xxxxxxxxx> wrote:
> Hi,
> 
> Thanks for hellp. I think that's the problem of my setup file. So I
> changed my setup file, andthe system give me a new problem:
> 
> Here is what the console dumps:
> 
> Linux version 2.6.8.1-xenU (root@xxxxxxxxxxxxxxxxxxxxx) (gcc version
> 3.3.3 20040412 (Red Hat Linux 3.3.3-7)) #1 Fri Oct 1 12:26:31 EDT 2004
> 
> BIOS-provided physical RAM map:
> 
>  Xen: 0000000000000000 - 0000000004000000 (usable)
> 
> 64MB LOWMEM available.
> 
> DMI not present.
> 
> Built 1 zonelists
> 
> Kernel command line:  ip=off:1.2.3.4::::eth0:off root=/dev/sda2 ro 3
> 
> Initializing CPU#0
> 
> PID hash table entries: 512 (order 9: 4096 bytes)
> 
> Xen reported: 1794.905 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: 62504k/65536k available (1508k kernel code, 2944k reserved,
> 427k data, 92k init, 0k highmem)
> 
> Checking if this processor honours the WP bit even in supervisor mode... Ok.
> 
> Calibrating delay loop... 3827.30 BogoMIPS
> 
> Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
> 
> CPU: CLK_CTL MSR was 0. Reprogramming to 20000000
> 
> CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
> 
> CPU: L2 Cache: 256K (64 bytes/line)
> 
> CPU: AMD Athlon(tm) XP 2200+ stepping 01
> 
> 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.
> 
> [XEN] Initialising virtual block device driver
> 
> Using anticipatory io scheduler
> 
> [XEN] Initialising virtual ethernet driver.
> 
> [XEN] Netfront recovered tx=0 rxfree=0
> 
> 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: Unable to guess netmask for address 238.0.0.0
> 
> Looking up port of RPC 100003/2 on 1.2.3.4
> 
> 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 1.2.3.4
> 
> 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 /tftpboot/238.0.0.0
> 
> VFS: Unable to mount root fs via NFS, trying floppy.
> 
> VFS: Cannot open root device "sda2" or unknown-block(2,0)
> 
> Please append a correct "root=" boot option
> 
> Kernel panic: VFS: Unable to mount root fs on unknown-block(2,0)
> 
>  ************ REMOTE CONSOLE: CTRL-] TO QUIT ********
> 
> ************ REMOTE CONSOLE EXITED *****************
> 
> 
> My xmdefconfig file and fstab file on /mnt/etc:
> 
> hda1 is my boot partition.  Before I ran the #xm create command , I
> had losetup /dev/loop1 /dev/loop2 to some disk partitions.
> 
> Here is my fstab file after mount loop1 and loop2:
> 
> /dev/sda2  /        ext3    defaults        1 1
> /dev/sda1  /boot    ext3    defaults        1 2
> none /dev/pts   devpts  gid=5,mode=620  0 0
> none /dev/shm   tmpfs   defaults        0 0
> none  /proc      proc    defaults        0 0
> none /sys       sysfs   defaults        0 0
> /dev/sda3   swap   swap   defaults  0  0
> 
> #  -*- mode: python; -*-
> #============================================================================
> # Python configuration setup for 'xm create'.
> # This script sets the parameters used when a domain is created using
> 'xm create'.
> # You use a separate script for each domain you want to create, or
> # you can set the parameters for the domain on the xm command line.
> #============================================================================
> 
> #----------------------------------------------------------------------------
> # Kernel image file.
> kernel = "/boot/vmlinuz-2.6.8.1-xenU"
> 
> # Optional ramdisk.
> #ramdisk = "/boot/initrd.gz"
> 
> # The domain build function. Default is 'linux'.
> builder='linux'
> #builder='netbsd'
> 
> # Initial memory allocation (in megabytes) for the new domain.
> memory = 64
> 
> # A name for your domain. All domains must have different names.
> name = "ExampleDomain"
> 
> # Which CPU to start domain on?
> cpu = -1   # leave to Xen to pick
> 
> #----------------------------------------------------------------------------
> # Define network interfaces.
> 
> # Number of network interfaces. Default is 1.
> #nics=1
> # Optionally define mac and/or bridge for the network interfaces.
> # Random MACs are assigned if not given.
> #vif = [ 'mac=aa:00:00:00:00:11, bridge=xen-br0' ]
> 
> #----------------------------------------------------------------------------
> # Define the disk devices you want the domain to have access to, and
> # what you want them accessible as.
> # Each disk entry is of the form phy:UNAME,DEV,MODE
> # where UNAME is the device, DEV is the device name the domain will see,
> # and MODE is r for read-only, w for read-write.
> 
> disk = [ 'phy:/dev/hda1,sda1,r']
> disk = [ 'phy:/dev/loop1,sda2,w' ]
> disk = [ 'phy:/dev/loop2,sda3,w' ]
> 
> #----------------------------------------------------------------------------
> # Set the kernel command line for the new domain.
> # You only need to define the IP parameters and hostname if the domain's
> # IP config doesn't, e.g. in ifcfg-eth0 or via DHCP.
> # You can use 'extra' to set the runlevel and custom environment
> # variables used by custom rc scripts (e.g. VMID=, usr= ).
> 
> # Set if you want dhcp to allocate the IP address.
> #dhcp="dhcp"
> # Set netmask.
> #netmask=
> # Set default gateway.
> #gateway=
> # Set the hostname.
> #hostname= "vm%d" % vmid
> 
> # Set root device.
> root="/dev/sda2 ro"
> 
> ip="off"
> # Root device for nfs.
> #root = "/dev/nfs"
> # The nfs server.
> #nfs_server = '169.254.1.0'
> # Root directory on the nfs server.
> #nfs_root   = '/full/path/to/root/directory'
> 
> # Sets runlevel 4.
> extra="3"
> 
> #----------------------------------------------------------------------------
> # Set according to whether you want the domain restarted when it exits.
> # The default is 'onreboot', which restarts the domain when it shuts down
> # with exit code reboot.
> # Other values are 'always', and 'never'.
> 
> #restart = 'onreboot'
> 
> #==================================================================
> 
> Thanks a lot!
> 
> Yi
> 
> 
> 
> 
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