Re: [Xen-users] How to create a domU on RedHat Enterprise AS 4.4?

["Liang Yang" <multisyncfe991@xxxxxxxxxxx>]

Hi Tom,

Thank you very much. You are right, no need to play with losetup stuff, just 
mount the logic volume, edit fstab and it works.
BTW, I found one weird thing:
I heard RAMDISK is not required for domU, but it seems I have to add RAMDISK 
to my domU config file, otherwiese the domU will hang up when it is booting. 
Please see the message below, the domU booting hangs up after 
"Continuing..." Do you have any clue for this issue? (xen-friendly glibc is 
already installed)
Thanks,

Liang

----------------------Begin of 
Message----------------------------------------------
xen]# xm create domain1.xm -c
Using config file "domain1.xm".
Started domain domain1
Linux version 2.6.16-xen (root@xxxxxxxxxxxxxxxxxxxxx) (gcc version 3.4.6 
20060404 (Red Hat 3.4.6-3)) #1 SMP Fri Sep 8 18:40:45 MST 2006
BIOS-provided physical RAM map:
Xen: 0000000000000000 - 0000000020000000 (usable)
0MB HIGHMEM available.
520MB LOWMEM available.
ACPI in unprivileged domain disabled
IRQ lockup detection disabled
Built 1 zonelists
Kernel command line:  ip=:1.2.3.4::::eth0:dhcp root=/dev/sda1 ro 3
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: 2666.662 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-fb7fe000, maxmem 33ffe000
Memory: 514048k/532480k available (2250k kernel code, 9780k reserved, 708k 
data, 172k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 5334.98 BogoMIPS 
(lpj=26674902)
Security Framework v1.0.0 initialized
Capability LSM initialized
Mount-cache hash table entries: 512
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 4096K
CPU: L3 cache: 4096K
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=0xdf800000
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 8
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: 32768 (order: 5, 131072 bytes)
TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
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
EXT2-fs warning (device sda1): ext2_fill_super: mounting ext3 filesystem as 
ext2
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 172k freed
Warning: unable to open an initial console.

 ***************************************************************
 ***************************************************************
 ** WARNING: Currently emulating unsupported memory accesses  **
 **          in /lib/tls glibc libraries. The emulation is    **
 **          slow. To ensure full performance you should      **
 **          install a 'xen-friendly' (nosegneg) version of   **
 **          the library, or disable tls support by executing **
 **          the following as root:                           **
 **          mv /lib/tls /lib/tls.disabled                    **
 ** Offending process: init (pid=1)                           **
 ***************************************************************
 ***************************************************************

Continuing...

----------------------End of 
Message----------------------------------------------


----- Original Message ----- 
From: "Tom Z. Napierala" <tom@xxxxxx>
To: <xen-users@xxxxxxxxxxxxxxxxxxx>
Sent: Monday, September 11, 2006 2:39 AM
Subject: Re: [Xen-users] How to create a domU on RedHat Enterprise AS 4.4?


> > Hi Tom,
> >
> > I can not even boot my domU, how can I check my domU fstab?
> >
> > Thanks,
> >
> > Liang
> As far as I see, your partition is on LVM volume 
> /dev/VG_Dom6_Linux/LogVol00
> Under your Dom0 create temporary folder :
> # mkdir /mnt/temp
> then mount your partition there (assuming it's ext3, if not, add -t option 
> and
> appriopriate fs):
> #mount /dev/VG_Dom6_Linux/LogVol00 /mnt/temp -o defaults
>
> All contents will be available under /mnt/temp, so edit 
> /mnt/temp/etc/fstab.
> That's the simplest way. Don't play with losetup, as you already have
> partition. Besides losetup is for file-based partitions.
>
> Regards,
> --
> Tom Napierala
> DB Alliance Limited
> North Point House, New Mallow Road, Cork, Ireland
> The National Software Centre, Mahon, Cork, Ireland
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

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