[Xen-users] Problems with FC4 and NFS Root

["Felipe Franciosi" <ozzy@xxxxxxxxxxxxx>]

Hello everyone,

I've been working with Xen and Debian for a while, but recently decided to
give it a try with Fedora Core 4 and NFS Root based fs.

I've installed the FC4 base system and the following packets with their
dependencies:
- xen
- kernel-xen0
- kernel-xenU

After setting my new default option in /etc/grub/menu.lst and starting
'xend', I've created a directory named "/vm" and copied the FC4 base
installation into there.

Then I've changed the /vm/etc/fstab to something like this:
10.0.0.1:/vm            /                       nfs     defaults        0 0
/dev/devpts             /dev/pts                devpts  gid=5,mode=620  0 0
/dev/shm                /dev/shm                tmpfs   defaults        0 0
/dev/proc               /proc                   proc    defaults        0 0
/dev/sys                /sys                    sysfs   defaults        0 0
LABEL=SWAP-hda2         swap                    swap    defaults        0 0

And created a /root/vm.swp swap file with something like this:
# dd if=/dev/zero of=/root/vm.swp bs=1024 count=262144
# mkswap /root/vm.swp

My configuration file is looking like this:
kernel = "/boot/vmlinuz-2.6.11-1.1369_FC4xenU"
memory = 64
name = "vm"
vif = [ 'mac=aa:00:00:00:00:f4, bridge=xen-br0' ]
disk = [ 'file:/root/vm.swp,hda2,w' ]
dhcp="dhcp"
root = "/dev/nfs"
nfs_server = '10.0.0.1'
nfs_root   = '/vm'
extra = "4"
restart = 'never'

I've also set /etc/exports to export /vm with the following options:
/vm 10.0.0.0/24(rw,sync,no_root_squash)

And I've started the NFS daemon with "service nfs start".

However, when booting the guest with "xm create -c vm.cfg" I get a crash
after IPsec netlink socket initialization.

Also note that when I've first installed the FC4, I've disabled SElinux:
# grep -v "^#" /etc/selinux/config
SELINUX=disabled
SELINUXTYPE=targeted
#

Any ideas on what might be happening?

Here is the boot sequence before the hang:
# xm create -c vm.cfg
Using config file "vm.cfg".
Started domain vm, console on port 9604
************ REMOTE CONSOLE: CTRL-] TO QUIT ********
Linux version 2.6.11-1.1369_FC4xenU (bhcompile@xxxxxxxxxxxxxxxxxxxxxxxxxx)
(gcc version 4.0.0 20050525 (Red Hat 4.0.0-9)) #1 SMP Thu Jun 2 23:33:51 EDT
2005
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000004000000 (usable)
64MB LOWMEM available.
Using x86 segment limits to approximate NX protection
DMI not present.
IRQ lockup detection disabled
Allocating PCI resources starting at 04000000 (gap: 04000000:fc000000)
Built 1 zonelists
Kernel command line:  ip=:10.0.0.1::::eth0:dhcp root=/dev/nfs
nfsroot=10.0.0.1:/vm1 4
Initializing CPU#0
PID hash table entries: 1024 (order: 10, 16384 bytes)
Xen reported: 1595.334 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: 60800k/65536k available (1785k kernel code, 4648k reserved, 506k
data, 156k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
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: 512
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 256K
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... disabled
CPU0: Intel(R) Pentium(R) 4 CPU 1.60GHz stepping 02
per-CPU timeslice cutoff: 731.13 usecs.
task migration cache decay timeout: 1 msecs.
SMP motherboard not detected.
smpboot_clear_io_apic_irqs
Brought up 1 CPUs
softlockup thread 0 started up.
NET: Registered protocol family 16
xen_mem: Initialising balloon driver.
Grant table initialized
audit: initializing netlink socket (disabled)
audit(1123554105.008:1): initialized
Total HugeTLB memory allocated, 0
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
SELinux:  Registering netfilter hooks
Initializing Cryptographic API
ksign: Installing public key data
Loading keyring
- Added public key 42BD35A990375F72
- 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
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
Xen virtual console successfully installed as tty1
Event-channel device installed.
Blkif frontend is using grant tables.
xen_blk: Initialising virtual block device driver
xen_net: Initialising virtual ethernet driver.
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 256 buckets, 4Kbytes
TCP established hash table entries: 4096 (order: 4, 65536 bytes)
TCP bind hash table entries: 4096 (order: 3, 49152 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
Initializing IPsec netlink socket
<...and it simply stays here...>

Best Regards,
Felipe


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