Hi Tom,
Sorry about the missing vif line in my previous post. I do have a vif
line in my config file like "vif = [ 'mac=00:16:3e:20:5d:c9,
bridge=xenbr0', ]".
I think its going down even before bringing up eth0 (the complete boot
log is attached to this mail). I am suspecting of the missing /dev/nfs
in dom0, which is required for the 'root' parameter, as pointed out in
xen user guide.
Any suggestions ?
-Abhishek
Tom Brown wrote:
On Sun, 25 Feb 2007, Abhishek Gaurav wrote:
Hi, I am new to xen and am trying to boot a VM from an NFS server. I
am using the default FC6-xen kernel and I do not have a /dev/nfs in
dom0. My config file is :
kernel = "/boot/vmlinuz-2.6.18-1.2798.fc6xen"
name = "test8"
memory = "512"
uuid = "2cc550ec-550a-6ad2-8121-7b089fc7d051"
vcpus=1
root = '/dev/nfs'
nfs_server = 'xx.xx.xx.xx'
nfs_root = '/home/xen-images/fc4'
if you're running a current version of xen you're going to need to
specify a vif line to get a virtual network interface...
vif = [ '' ]
should suffice.
I run into the following problem during boot:
TCP bic registered
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
XENBUS: Device with no driver: device/vif/0
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
VFS: Cannot open root device "nfs" or unknown-block(0,255)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,255)
Please let me know what is that I am doing wrong.
if there is no reference to eth0 in your boot messages, you're not
going to have a network, without a network you're not going to have a
network file system...
-Tom
Bootdata ok (command line is root=/dev/nfs
nfsroot=136.159.8.14:/home/xen-images/fc4 )
Linux version 2.6.18-1.2798.fc6xen (brewbuilder@xxxxxxxxxxxxxxxxxxxxxxxxxxx)
(gcc version 4.1.1 20061011 (Red Hat 4.1.1-30)) #1 SMP Mon Oct 16 14:59:01 EDT
2006
BIOS-provided physical RAM map:
Xen: 0000000000000000 - 0000000040800000 (usable)
No mptable found.
Built 1 zonelists. Total pages: 264192
Kernel command line: root=/dev/nfs nfsroot=136.159.8.14:/home/xen-images/fc4
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 32768 bytes)
Xen reported: 2400.084 MHz processor.
Console: colour dummy device 80x25
Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes)
Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes)
Software IO TLB disabled
Memory: 1021176k/1056768k available (2323k kernel code, 26756k reserved, 1328k
data, 172k init)
Calibrating delay using timer specific routine.. 6002.15 BogoMIPS (lpj=12004302)
Security Framework v1.0.0 initialized
SELinux: Initializing.
SELinux: Starting in permissive mode
selinux_register_security: Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 256
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: Physical Processor ID: 1
CPU: Processor Core ID: 1
(SMP-)alternatives turned off
Brought up 1 CPUs
Grant table initialized
NET: Registered protocol family 16
Brought up 1 CPUs
PCI: setting up Xen PCI frontend stub
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
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
NetLabel: Initializing
NetLabel: domain hash size = 128
NetLabel: protocols = UNLABELED CIPSOv4
NetLabel: unlabeled traffic allowed by default
NET: Registered protocol family 2
IP route cache hash table entries: 65536 (order: 7, 524288 bytes)
TCP established hash table entries: 131072 (order: 10, 4194304 bytes)
TCP bind hash table entries: 65536 (order: 9, 2097152 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
IA-32 Microcode Update Driver: v1.14-xen <tigran@xxxxxxxxxxx>
audit: initializing netlink socket (disabled)
audit(1172464126.972:1): initialized
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
SELinux: Registering netfilter hooks
Initializing Cryptographic API
ksign: Installing public key data
Loading keyring
- Added public key 4D36EEF71C3A3150
- User ID: Red Hat, Inc. (Kernel Module GPG key)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
rtc: IRQ 8 is not free.
Non-volatile memory driver v1.2
Linux agpgart interface v0.101 (c) Dave Jones
RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize
Xen virtual console successfully installed as xvc0
Bootdata ok (command line is root=/dev/nfs
nfsroot=136.159.8.14:/home/xen-images/fc4 )
Linux version 2.6.18-1.2798.fc6xen (brewbuilder@xxxxxxxxxxxxxxxxxxxxxxxxxxx)
(gcc version 4.1.1 20061011 (Red Hat 4.1.1-30)) #1 SMP Mon Oct 16 14:59:01 EDT
2006
BIOS-provided physical RAM map:
Xen: 0000000000000000 - 0000000040800000 (usable)
No mptable found.
Built 1 zonelists. Total pages: 264192
Kernel command line: root=/dev/nfs nfsroot=136.159.8.14:/home/xen-images/fc4
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 32768 bytes)
Xen reported: 2400.084 MHz processor.
Console: colour dummy device 80x25
Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes)
Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes)
Software IO TLB disabled
Memory: 1021176k/1056768k available (2323k kernel code, 26756k reserved, 1328k
data, 172k init)
Calibrating delay using timer specific routine.. 6002.15 BogoMIPS (lpj=12004302)
Security Framework v1.0.0 initialized
SELinux: Initializing.
SELinux: Starting in permissive mode
selinux_register_security: Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 256
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: Physical Processor ID: 1
CPU: Processor Core ID: 1
(SMP-)alternatives turned off
Brought up 1 CPUs
Grant table initialized
NET: Registered protocol family 16
Brought up 1 CPUs
PCI: setting up Xen PCI frontend stub
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
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
NetLabel: Initializing
NetLabel: domain hash size = 128
NetLabel: protocols = UNLABELED CIPSOv4
NetLabel: unlabeled traffic allowed by default
NET: Registered protocol family 2
IP route cache hash table entries: 65536 (order: 7, 524288 bytes)
TCP established hash table entries: 131072 (order: 10, 4194304 bytes)
TCP bind hash table entries: 65536 (order: 9, 2097152 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
IA-32 Microcode Update Driver: v1.14-xen <tigran@xxxxxxxxxxx>
audit: initializing netlink socket (disabled)
audit(1172464126.972:1): initialized
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
SELinux: Registering netfilter hooks
Initializing Cryptographic API
ksign: Installing public key data
Loading keyring
- Added public key 4D36EEF71C3A3150
- User ID: Red Hat, Inc. (Kernel Module GPG key)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
rtc: IRQ 8 is not free.
Non-volatile memory driver v1.2
Linux agpgart interface v0.101 (c) Dave Jones
RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize
Xen virtual console successfully installed as xvc0
Event-channel device installed.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
ide-floppy driver 0.99.newide
usbcore: registered new driver libusual
usbcore: registered new driver hiddev
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
mice: PS/2 mouse device common for all mice
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 4.39
TCP bic registered
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
XENBUS: Device with no driver: device/vif/0
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
VFS: Cannot open root device "nfs" or unknown-block(0,255)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,255)
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