Re: [Xen-users] Problems with FC4 and NFS Root

[Minoru Kato <kato.minoru@xxxxxxxxxxxx>]

Hi,
vmlinuz-2.6.11-1.1369_FC4xenU has NFS-FS by modules. (not included statically)
Therefore, it cannot start by NFS-Root.
---
kato

> 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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> 

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