[Xen-users] Linux PV Drivers - VBD device not loading - Cannot get Major 3/22 for ide

["Robert Dunkley" <Robert@xxxxxxxxx>]

I am trying to get PV drivers running on both Centos 5.1 and Centos 5.3
HVMs, my DomU is Centos 5.2 with Xen 3.31. For 5.1 I install the
kmod-xenpv RPM but for 5.3 the drivers seem to be built-in. 

For the network drivers to work I had to unload the Realtek NIC driver
and renamed its .ko files to stop it loading. Adding the Xen-Vnif alias
to modprobe.conf then got the PV NICs working nicely (Much faster).

The problem is I can't seem to get the PV disk drivers running, I'm
using a standard partition for the VM (phy:), part of the problem may be
that the QEMU emulated disks are loading first but I'm unsure. Below is
what I think are the relevant extracts from the Centos 5.3 HVM log,
anyone have any idea on how to fix this?



ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
PIIX3: IDE controller at PCI slot 0000:00:01.1
PIIX3: chipset revision 0
PIIX3: not 100% native mode: will probe irqs later
PCI: Setting latency timer of device 0000:00:01.1 to 64
    ide0: BM-DMA at 0xc200-0xc207, BIOS settings: hda:pio, hdb:pio
    ide1: BM-DMA at 0xc208-0xc20f, BIOS settings: hdc:pio, hdd:pio
Probing IDE interface ide0...
hda: QEMU HARDDISK, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
hdc: QEMU DVD-ROM, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
hda: max request size: 512KiB
hda: 104854328 sectors (53685 MB) w/256KiB Cache, CHS=16383/255/63,
(U)DMA
hda: cache flushes supported
 hda: hda1 hda2
....<SNIP>......
Xen version 3.3.
Hypercall area is 1 pages.
Grant table initialized
parport: PnPBIOS parport detected.
parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
piix4_smbus 0000:00:01.3: Found 0000:00:01.3 device
piix4_smbus 0000:00:01.3: SMB base address uninitialized - upgrade BIOS
or use f
orce_addr=0xaddr
hdc: ATAPI 4X CD-ROM drive, 512kB Cache, (U)DMA
Uniform CD-ROM driver Revision: 3.20
Registering block device major 3
register_blkdev: cannot get major 3 for ide
xen_blk: can't get major 3 with name ide
vbd vbd-768: 19 xlvbd_add at /local/domain/0/backend/vbd/109/768
Registering block device major 3
register_blkdev: cannot get major 3 for ide
xen_blk: can't get major 3 with name ide
vbd vbd-768: 19 xlvbd_add at /local/domain/0/backend/vbd/109/768
Registering block device major 22
register_blkdev: cannot get major 22 for ide
xen_blk: can't get major 22 with name ide
vbd vbd-5632: 19 xlvbd_add at /local/domain/0/backend/vbd/109/5632
xen_mem: Initialising balloon driver.
netfront: Initialising virtual ethernet driver.
netfront: device eth0 has copying receive path.
XENBUS: Timeout connecting to device: device/vbd/768 (state 6)
XENBUS: Timeout connecting to device: device/vbd/5632 (state 6)



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