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Re: [Xen-users] + xm create gives Kernel panic error

To: Shabs <shabswork@xxxxxxxxxxx>
Subject: Re: [Xen-users] + xm create gives Kernel panic error
From: Sander <sgr@xxxxxxxxxxx>
Date: Wed, 3 May 2006 19:47:03 +0200
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Your kernel can't find its rootfs. You must specify this correctly in
the domU configuration file.

Sander

On Wed, May 03, 2006 at 05:59:18PM +0100, Shabs wrote:
> Hi all
>  
>  Finally got xm create to do something (intention was to simply create a 
> simple VM), but it doesn't hang around for more than a few secs:
>  
>  Now it produces a kernel panic which I think has something to do with 
> grub.conf??
>  
>  Can anyone help? Thanks in advance.
>  
>  See last 2 lines of output:
>  
>  [root@localhost xen]# xm create sr-config1 -c vmid=1
>  Using config file "sr-config1".
>  Started domain VM1
>  Linux version 2.6.16-xen3_86.1_fc4 (rread@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx) 
> (gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)) #1 SMP Thu Apr 13 08:26:52 PDT 
> 2006
>  BIOS-provided physical RAM map:
>   Xen: 0000000000000000 - 0000000004000000 (usable)
>  0MB HIGHMEM available.
>  72MB LOWMEM available.
>  ACPI in unprivileged domain disabled
>  IRQ lockup detection disabled
>  Built 1 zonelists
>  Kernel command line:  ip=:1.2.3.4:::vm1:eth0:dhcp root=/dev/hda1 ro 4 VMID=1 
> usr=/dev/hda1
>  Enabling fast FPU save and restore... done.
>  Enabling unmasked SIMD FPU exception support... done.
>  Initializing CPU#0
>  PID hash table entries: 512 (order: 9, 8192 bytes)
>  Xen reported: 2391.142 MHz processor.
>  Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
>  Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
>  Software IO TLB disabled
>  vmalloc area: c5000000-fb7fe000, maxmem 33ffe000
>  Memory: 61016k/73728k available (2188k kernel code, 4452k reserved, 681k 
> data, 168k init, 0k highmem)
>  Checking if this processor honours the WP bit even in supervisor mode... Ok.
>  Calibrating delay using timer specific routine.. 4785.88 BogoMIPS 
> (lpj=23929449)
>  Security Framework v1.0.0 initialized
>  Capability LSM initialized
>  Mount-cache hash table entries: 512
>  CPU: Trace cache: 12K uops, L1 D cache: 8K
>  CPU: L2 cache: 512K
>  Checking 'hlt' instruction... OK.
>  Brought up 1 CPUs
>  migration_cost=0
>  Grant table initialized
>  NET: Registered protocol family 16
>  Brought up 1 CPUs
>  PCI: setting up Xen PCI frontend stub
>  ACPI: Subsystem revision 20060127
>  ACPI: Interpreter disabled.
>  Linux Plug and Play Support v0.97 (c) Adam Belay
>  xen_mem: Initialising balloon driver.
>  usbcore: registered new driver usbfs
>  usbcore: registered new driver hub
>  PCI: System does not support PCI
>  PCI: System does not support PCI
>  IA-32 Microcode Update Driver: v1.14-xen <tigran@xxxxxxxxxxx>
>  VFS: Disk quotas dquot_6.5.1
>  Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
>  Initializing Cryptographic API
>  io scheduler noop registered
>  io scheduler anticipatory registered (default)
>  io scheduler deadline registered
>  io scheduler cfq registered
>  PNP: No PS/2 controller found. Probing ports directly.
>  i8042.c: No controller found.
>  RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
>  Xen virtual console successfully installed as tty1
>  Event-channel device installed.
>  blkif_init: reqs=64, pages=704, mmap_vstart=0xc3c00000
>  netfront: Initialising virtual ethernet driver.
>  Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
>  ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
>  Registering block device major 3
>  ide-floppy driver 0.99.newide
>  usbmon: debugfs is not available
>  usbcore: registered new driver libusual
>  mice: PS/2 mouse device common for all mice
>  NET: Registered protocol family 2
>  IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
>  TCP established hash table entries: 4096 (order: 3, 32768 bytes)
>  TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
>  TCP: Hash tables configured (established 4096 bind 4096)
>  TCP reno registered
>  Initializing IPsec netlink socket
>  NET: Registered protocol family 1
>  NET: Registered protocol family 17
>  NET: Registered protocol family 8
>  NET: Registered protocol family 20
>  Using IPI No-Shortcut mode
>  Kernel panic - not syncing: VFS: Unable to mount root fs on 
> unknown-block(3,1)
>   [root@localhost xen]#
>  
-- 
"True, but until we get off our butts and write it, we have to use
something" -- markwalling on /.

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