Re: [Xen-users] Problems booting domian - unable to mount root device

[Czerwinski <czerwinski@xxxxxxxx>]

err.... I did not find the mentioned solition, but:

I could fix it:
o       I tried to install a SuSE-guest-domain - worked.
o       I tried both /boot and /dev from SuSE-guest on debian-guest - no 
success.
o       I disabled the ramdisk-statement in the xencfg-file (this is ESSENTIAL!)
o	Then I ran out of loop-devices that I need for mounting the VBD (mount  
-o loop /usr/local/xenvm/vm1disk /mnt/vm1disk)
	I don't exactly know how this can happen, but I cound find out that loop  
devices can be free via losetup -d /dev/loop<no>
        I freed all loop-devs, since then debian boots.

There are still some odd things happening, but I think the boot-problem  
should be solved now.
All the best!

Cz.

On Thu, 16 Jun 2005 14:34:44 +0200, e&v <ervin23@xxxxxxxxx> wrote:

> see the mails on the following subject and you'll find the solution /
>
> "Suse 9.3 "kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block (8,1)"
>
> On 6/16/05, Czerwinski <czerwinski@xxxxxxxx> wrote:
> > Hi everybody,
> >
> > i run SuSE 9.3 on a thinkpad T30, 1 GB RAM, 60 GB HDD, Pentium IV  
> > Mobile,
> > 2 GHz.
> >
> > For trying Xen i deviced to install debian on a file-backed VBD as
> > described in the chapters 5.2 and appendix A in the user's documentation
> > on  
> > http://www.cl.cam.ac.uk/Research/SRG/netos/xen/readmes/user/user.html.
> > I have to do the installation on a VBD because my SuSE uses all the HD:
> > # fdisk -l /dev/hda
> >
> > Disk /dev/hda: 60.0 GB, 60011642880 bytes
> > 255 heads, 63 sectors/track, 7296 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> >
> >     Device Boot      Start         End      Blocks   Id  System
> > /dev/hda1               1         131     1052226   82  Linux swap /
> > Solaris
> > /dev/hda2   *         132        7296    57552862+  83  Linux
> >
> > After some troubles I got my dom0 running (I allow 512 MB RAM):
> > # xm list
> > Name              Id  Mem(MB)  CPU  State  Time(s)  Console
> > Domain-0           0      512    0  r----    668.8
> >
> > This is my xencfg:
> > #  -*- 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-xen"
> >
> > # Optional ramdisk.
> > ramdisk = "/boot/initrd-xen"
> >
> > # The domain build function. Default is 'linux'.
> > builder='linux'
> >
> > # Initial memory allocation (in megabytes) for the new domain.
> > memory = 64
> >
> > # A name for your domain. All domains must have different names.
> > name = "VM_Debian"
> >
> > # 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 = [ 'file:/usr/local/xenvm/vm1disk,hda1,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= "vm1"
> >
> > # Set root device.
> > #root = "/dev/hda1 ro"
> > root = "/dev/hda1 ro"
> >
> > # 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 = "4"
> >
> > #----------------------------------------------------------------------------
> > # 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'
> >
> > #============================================================================
> >
> >
> > The debian-(guest-)system was installed via debootstrap.
> >
> > When I start the domain the following happens:
> > # xm create -c xencfg
> > Using config file "/etc/xen/xencfg".
> > Started domain VM_Debian, console on port 9617
> > ************ REMOTE CONSOLE: CTRL-] TO QUIT ********
> > Linux version 2.6.11.4-21.7-xen (geeko@buildhost) (gcc version 3.3.5
> > 20050117 (prerelease) (SUSE Linux)) #1 Thu Jun 2 14:23:14 UTC 2005
> > BIOS-provided physical RAM map:
> >   Xen: 0000000000000000 - 0000000004000000 (usable)
> > 0MB HIGHMEM available.
> > 64MB LOWMEM available.
> > DMI not present.
> > IRQ lockup detection disabled
> > Allocating PCI resources starting at 04000000 (gap: 04000000:fc000000)
> > Built 1 zonelists
> > Kernel command line:  ip=:1.2.3.4:::vm1:eth0:dhcp root=/dev/hda1 ro 4
> > Initializing CPU#0
> > PID hash table entries: 512 (order: 9, 8192 bytes)
> > Xen reported: 1993.584 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: 58832k/65536k available (1902k kernel code, 6616k reserved, 568k
> > data, 136k init, 0k highmem)
> > Checking if this processor honours the WP bit even in supervisor mode...
> > Ok.
> > Security Framework v1.0.0 initialized
> > SELinux:  Disabled at boot.
> > 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) Pentium(R) 4 Mobile CPU 2.00GHz stepping 04
> > Enabling fast FPU save and restore... done.
> > Enabling unmasked SIMD FPU exception support... done.
> > Checking 'hlt' instruction... disabled
> > checking if image is initramfs... it is
> > Freeing initrd memory: 2882k freed
> > NET: Registered protocol family 16
> > PCI: Using configuration type Xen
> > Linux Plug and Play Support v0.97 (c) Adam Belay
> > xen_mem: Initialising balloon driver.
> > PCI: Probing PCI hardware
> > PCI: Probing PCI hardware
> > PCI: Probing PCI hardware (bus 00)
> > TC classifier action (bugs to netdev@xxxxxxxxxxx cc hadi@xxxxxxxxxx)
> > audit: initializing netlink socket (disabled)
> > audit(1118921503.069:0): initialized
> > Total HugeTLB memory allocated, 0
> > VFS: Disk quotas dquot_6.5.1
> > Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
> > Initializing Cryptographic API
> > vesafb: abort, cannot reserve video memory at 0x0
> > vesafb: abort, cannot ioremap video memory 0x0 @ 0x0
> > Trying to free nonexistent resource <00000000-ffffffff>
> > vesafb: probe of vesafb.0 failed with error -5
> > isapnp: Scanning for PnP cards...
> > isapnp: No Plug & Play device found
> > PNP: No PS/2 controller found. Probing ports directly.
> > i8042.c: No controller found.
> > io scheduler noop registered
> > io scheduler anticipatory registered
> > io scheduler deadline registered
> > io scheduler cfq registered
> > RAMDISK driver initialized: 16 RAM disks of 64000K size 1024 blocksize
> > loop: loaded (max 8 devices)
> > Xen virtual console successfully installed as tty
> > Event-channel device installed.
> > xen_blk: Initialising virtual block device driver
> > xen_net: Initialising virtual ethernet driver.
> > mice: PS/2 mouse device common for all mice
> > md: md driver 0.90.1 MAX_MD_DEVS=256, MD_SB_DISKS=27
> > NET: Registered protocol family 2
> > IP: routing cache hash table of 512 buckets, 4Kbytes
> > TCP established hash table entries: 4096 (order: 3, 32768 bytes)
> > TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
> > TCP: Hash tables configured (established 4096 bind 4096)
> > NET: Registered protocol family 1
> > NET: Registered protocol family 8
> > NET: Registered protocol family 20
> > Freeing unused kernel memory: 136k freed
> > Starting udev
> > Creating devices
> > Loading kernel/drivers/ide/ide-core.ko
> > Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> > ide: Assuming 50MHz system bus speed for PIO modes; override with  
> > idebus=xx
> > Loading kernel/drivers/ide/pci/piix.ko
> > Loading kernel/drivers/ide/ide-disk.ko
> > Loading kernel/drivers/cdrom/cdrom.ko
> > Loading kernel/drivers/ide/ide-cd.ko
> > Loading kernel/fs/reiserfs/reiserfs.ko
> > Waiting for device /dev/hda1 to appear:  ok
> > rootfs:  major=3 minor=1 devn=769
> > Mounting root /dev/hda1
> > mount: No such device
> > Kernel panic - not syncing: Attempted to kill init!
> >   <0>Rebooting in 1 seconds..Linux version 2.6.11.4-21.7-xen
> > (geeko@buildhost) (gcc version 3.3.5 20050117 (prerelease) (SUSE Linux))
> > #1 Thu Jun 2 14:23:14 UTC 2005
> > BIOS-provided physical RAM map:
> >   Xen: 0000000000000000 - 0000000004000000 (usable)
> > 0MB HIGHMEM available.
> > 64MB LOWMEM available.
> > DMI not present.
> > IRQ lockup detection disabled
> > Allocating PCI resources starting at 04000000 (gap: 04000000:fc000000)
> > Built 1 zonelists
> > Kernel command line:  ip=:1.2.3.4:::vm1:eth0:dhcp root=/dev/hda1 ro 4
> > Initializing CPU#0
> > PID hash table entries: 512 (order: 9, 8192 bytes)
> > Xen reported: 1993.584 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: 58832k/65536k available (1902k kernel code, 6616k reserved, 568k
> > data, 136k init, 0k highmem)
> > Checking if this processor honours the WP bit even in supervisor mode...
> > Ok.
> > Security Framework v1.0.0 initialized
> > SELinux:  Disabled at boot.
> > 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) Pentium(R) 4 Mobile CPU 2.00GHz stepping 04
> > Enabling fast FPU save and restore... done.
> > Enabling unmasked SIMD FPU exception support... done.
> > Checking 'hlt' instruction... disabled
> > checking if image is initramfs... it is
> > Freeing initrd memory: 2882k freed
> > NET: Registered protocol family 16
> > PCI: Using configuration type Xen
> > Linux Plug and Play Support v0.97 (c) Adam Belay
> > xen_mem: Initialising balloon driver.
> > PCI: Probing PCI hardware
> > PCI: Probing PCI hardware
> > PCI: Probing PCI hardware (bus 00)
> > TC classifier action (bugs to netdev@xxxxxxxxxxx cc hadi@xxxxxxxxxx)
> > audit: initializing netlink socket (disabled)
> > audit(1118921508.329:0): initialized
> > Total HugeTLB memory allocated, 0
> > VFS: Disk quotas dquot_6.5.1
> > Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
> > Initializing Cryptographic API
> > vesafb: abort, cannot reserve video memory at 0x0
> > vesafb: abort, cannot ioremap video memory 0x0 @ 0x0
> > Trying to free nonexistent resource <00000000-ffffffff>
> > vesafb: probe of vesafb.0 failed with error -5
> > isapnp: Scanning for PnP cards...
> > isapnp: No Plug & Play device found
> > PNP: No PS/2 controller found. Probing ports directly.
> > i8042.c: No controller found.
> > io scheduler noop registered
> > io scheduler anticipatory registered
> > io scheduler deadline registered
> > io scheduler cfq registered
> > RAMDISK driver initialized: 16 RAM disks of 64000K size 1024 blocksize
> > loop: loaded (max 8 devices)
> > Xen virtual console successfully installed as tty
> > Event-channel device installed.
> > xen_blk: Initialising virtual block device driver
> > xen_net: Initialising virtual ethernet driver.
> > mice: PS/2 mouse device common for all mice
> > md: md driver 0.90.1 MAX_MD_DEVS=256, MD_SB_DISKS=27
> > NET: Registered protocol family 2
> > IP: routing cache hash table of 512 buckets, 4Kbytes
> > TCP established hash table entries: 4096 (order: 3, 32768 bytes)
> > TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
> > TCP: Hash tables configured (established 4096 bind 4096)
> > NET: Registered protocol family 1
> > NET: Registered protocol family 8
> > NET: Registered protocol family 20
> > Freeing unused kernel memory: 136k freed
> > Starting udev
> > Creating devices
> > Loading kernel/drivers/ide/ide-core.ko
> > Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> > ide: Assuming 50MHz system bus speed for PIO modes; override with  
> > idebus=xx
> > Loading kernel/drivers/ide/pci/piix.ko
> > Loading kernel/drivers/ide/ide-disk.ko
> > Loading kernel/drivers/cdrom/cdrom.ko
> > Loading kernel/drivers/ide/ide-cd.ko
> > Loading kernel/fs/reiserfs/reiserfs.ko
> > Waiting for device /dev/hda1 to appear:  ok
> > rootfs:  major=3 minor=1 devn=769
> > Mounting root /dev/hda1
> > mount: No such device
> > Kernel panic - not syncing: Attempted to kill init!
> >   <0>Rebooting in 1 seconds.. ----------------
> >
> > I checked the devs of the guest-installation:
> > # chroot /mnt/vm1disk/
> > # ls -lac /dev/h*
> > brw-r--r--  1 root root 3, 0 Jun 16 10:47 /dev/hda
> > brw-r--r--  1 root root 3, 1 Jun 16 10:45 /dev/hda1
> > brw-rw----  1 root disk 3, 2 Jun 16 11:17 /dev/hda2
> >
> > fstab of guest-installation:
> > # cat /etc/fstab
> > /dev/hda1            /                    ext3       acl,user_xattr
> > 1 1
> > proc                 /proc                proc       defaults
> > 0 0
> > usbfs                /proc/bus/usb        usbfs      noauto
> > 0 0
> > sysfs                /sys                 sysfs      noauto
> > 0 0
> > /dev/cdrecorder      /media/cdrecorder    subfs
> > noauto,fs=cdfss,unhide,ro,procuid,nosuid,nodev,exec,iocharset=utf8 0 0
> >
> > So, could anybody please give some hints where to look for the problem?
> >
> > Thanks for any help!
> >
> > Cz.
> > --
> > Using Opera's revolutionary e-mail client: http://www.opera.com/m2/
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users


--
Using Opera's revolutionary e-mail client: http://www.opera.com/m2/

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users