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[Xen-users] Vm creation problem through NFS Mount.

To: <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-users] Vm creation problem through NFS Mount.
From: "Nitesh Gangarde, Noida" <nitesh.g@xxxxxx>
Date: Thu, 13 Jul 2006 11:22:51 +0530
Cc: "Sudha Mohan Panda, Noida" <sudhap@xxxxxx>, "Iqbal Ashraf, Noida" <iqbal.a@xxxxxx>, "Shweta Kumari, Noida" <shwetak@xxxxxx>
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Thread-index: AcamQJQS7nBG+rK0SuKY5MohVBvTLw==
Thread-topic: Vm creation problem through NFS Mount.

Hi

 

 I am trying to create a domU using the nfs mount. But I am getting

 some problem which I am listing down. I need your help in solving the same.

 xm create -c nfs vmid=1 gives the following error : Error that I am getting is listed in red

 Font color.

 

 Linux version 2.6.16-1.2122_FC5xenU

 (bhcompile@xxxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc version 4.1.0 20060304

 (Red Hat 4.1.0-3)) #1 SMP Sun May 21 15:52:00 EDT 2006 BIOS-provided

 physical RAM map:

  Xen: 0000000000000000 - 0000000020000000 (usable) 0MB HIGHMEM

 available.

 520MB LOWMEM available.

 Using x86 segment limits to approximate NX protection IRQ lockup

 detection disabled Built 1 zonelists Kernel command line:

 ip=10.112.77.71:10.112.69.119::255.255.255.0::eth0:off root=/dev/nfs

 nfsroot=10.112.69.119:/linuxfs Enabling fast FPU save and restore...

 done.

 Enabling unmasked SIMD FPU exception support... done.

 Initializing CPU#0

 PID hash table entries: 4096 (order: 12, 65536 bytes) Xen reported:

 2666.756 MHz processor.

 Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)

 Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)

 Software IO TLB disabled vmalloc area: e1000000-fb3fe000, maxmem

 33ffe000

 Memory: 514048k/532480k available (1655k kernel code, 9896k reserved,

 618k data, 132k init, 0k highmem) Checking if this processor honours

 the WP bit even in supervisor mode...

 Ok.

 calibrate_delay_direct() failed to get a good estimate for

 loops_per_jiffy.

 Probably due to long platform interrupts. Consider using "lpj=" boot

 option.

 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: 16K

 CPU: L2 cache: 1024K

 Checking 'hlt' instruction... OK.

 Brought up 1 CPUs

 0

 Grant table initialized

 NET: Registered protocol family 16

 Brought up 1 CPUs

 xen_mem: Initialising balloon driver.

 audit: initializing netlink socket (disabled)

 audit(1152271275.312:1): initialized

 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 43645308A4C9E5AD

 - 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)

 rtc: IRQ 8 is not free.

 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.

 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

 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

 NET: Registered protocol family 2

 IP route cache hash table entries: 32768 (order: 5, 131072 bytes) TCP

 established hash table entries: 131072 (order: 9, 2621440 bytes) TCP

 bind hash table entries: 65536 (order: 8, 1310720 bytes)

 TCP: Hash tables configured (established 131072 bind 65536) TCP reno

 registered TCP bic registered Initializing IPsec netlink socket

 NET: Registered protocol family 1

 NET: Registered protocol family 17

 Using IPI No-Shortcut mode

 XENBUS: Timeout connecting to devices!

 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)

  [<c01178a0>] panic+0x3c/0x188

  [<c033ca24>] mount_block_root+0x19c/0x1aa  [<c033ca7b>]

 mount_root+0x49/0x4e  [<c033cb40>] prepare_namespace+0xc0/0xf1 

 [<c0102267>] init+0x23e/0x2fe  [<c0102029>] init+0x0/0x2fe 

 [<c01029ad>] kernel_thread_helper+0x5/0xb

 

 The config file nfs that I am using is :

 

 kernel = "/boot/vmlinuz-2.6.16-1.2122_FC5xenU"

 memory = 512

 name = "vm01"

 vif = [ '' ]

 ip = "10.112.77.71"

 netmask= '255.255.255.0'

 root = "/dev/nfs"

 nfs_server = '10.112.69.119'

 nfs_root   = '/linuxfs'

 

 The whole filesystem is copied on 10.112.69.119 under /linuxfs. And I

 am able to mount this on any remote system.

 Actually , the problem here lies with "root=/dev/nfs", what it

 actually points to ?

 

 Can any body help me out to solve this problem?

 

 

Thanks & Regards

Nitesh Gangrade

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