[Xen-devel] Unable to boot dom0 - Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

[David F Barrera <dfbp@xxxxxxxxxx>]

I am unable to boot dom0 on any on my machines today, using changeset 
8729. This is happening in both x86 and x86_64, SLES 9 and FC4 based 
platforms. I will pull latest source and rebuild just in case it has 
already been fixed.

ACPI: IOAPIC (id[0x0e] address[0xfec01000] gsi_base[35])
IOAPIC[1]: apic_id 14, version 17, address 0xfec01000, GSI 35-70
ACPI: IOAPIC (id[0x0d] address[0xfec02000] gsi_base[70])
IOAPIC[2]: apic_id 13, version 17, address 0xfec02000, GSI 70-105
ACPI: IOAPIC (id[0x0c] address[0xfec03000] gsi_base[105])
IOAPIC[3]: apic_id 12, version 17, address 0xfec03000, GSI 105-140
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 8 global_irq 8 low edge)
ACPI: INT_SRC_OVR (bus 0 bus_irq 14 global_irq 14 low edge)
Setting APIC routing to xen
Using ACPI (MADT) for SMP configuration information
Allocating PCI resources starting at ea000000 (gap: e8000000:16c00000)
Built 1 zonelists
Kernel command line: ro root=/dev/sda2 adp94xx=attach_HostRAID:1 
console=ttyS0, 115200
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 131072 bytes)
Xen reported: 3000.002 MHz processor.
Console: colour VGA+ 80x25
Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
Software IO TLB enabled:
Aperture:     64 megabytes
Bus range:    0x000000000c000000 - 0x0000000010000000
Kernel range: 0xffff88000216c000 - 0xffff88000616c000
Memory: 931584k/1032192k available (3457k kernel code, 99972k reserved, 
1330k data, 292k init)
Calibrating delay using timer specific routine.. 7508.64 BogoMIPS 
(lpj=15017281)
Mount-cache hash table entries: 256
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 1024K
CPU: L3 cache: 8192K
CPU:                Intel(R) Xeon(TM) MP CPU 3.00GHz stepping 01
Grant table initialized
NET: Registered protocol family 16
ACPI: bus type pci registered
PCI: Using configuration type 1
ACPI: Subsystem revision 20050902
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [VP00] (0000:00)
PCI: Ignoring BAR0-3 of IDE controller 0000:00:0f.1
ACPI: PCI Root Bridge [VP01] (0000:01)
ACPI: PCI Root Bridge [VP02] (0000:02)
ACPI: PCI Root Bridge [VP03] (0000:04)
ACPI: PCI Root Bridge [VP04] (0000:06)
ACPI: PCI Root Bridge [VP05] (0000:08)
ACPI: PCI Root Bridge [VP06] (0000:0a)
ACPI: PCI Root Bridge [VP07] (0000:0c)

ACPI: PCI Root Bridge [VP10] (0000:0e)
ACPI: PCI Root Bridge [VP11] (0000:0f)
ACPI: PCI Root Bridge [VP12] (0000:10)
ACPI: PCI Root Bridge [VP13] (0000:12)
ACPI: PCI Root Bridge [VP14] (0000:14)
ACPI: PCI Root Bridge [VP15] (0000:16)
ACPI: PCI Root Bridge [VP16] (0000:18)
ACPI: PCI Root Bridge [VP17] (0000:1a)
xen_mem: Initialising balloon driver.
SCSI subsystem initialized
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: Using ACPI for IRQ routing
PCI: If a device doesn't work, try "pci=routeirq".  If it helps, post a 
report
IA-32 Microcode Update Driver: v1.14-xen <tigran@xxxxxxxxxxx>
IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
Real Time Clock Driver v1.12
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
floppy0: no floppy controllers found
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
loop: loaded (max 8 devices)
HP CISS Driver (v 2.6.8)
Intel(R) PRO/1000 Network Driver - version 6.1.16-k2
Copyright (c) 1999-2005 Intel Corporation.
pcnet32.c:v1.31c 01.Nov.2005 tsbogend@xxxxxxxxxxxxxxxx
e100: Intel(R) PRO/100 Network Driver, 3.4.14-k4-NAPI
e100: Copyright(c) 1999-2005 Intel Corporation
tg3.c:v3.47 (Dec 28, 2005)
GSI 16 sharing vector 0xA9 and IRQ 16
ACPI: PCI Interrupt 0000:01:01.0[A] -> GSI 24 (level, low) -> IRQ 16
eth0: Tigon3 [partno(BCM95704A6) rev 2100 PHY(5704)] (PCIX:66MHz:64-bit) 
10/100/1000BaseT Ethernet 00:14:5e:1b:03:e2
eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] Split[0] WireSpeed[1] 
TSOcap[0]
eth0: dma_rwctrl[769f0000]
GSI 17 sharing vector 0xB1 and IRQ 17
ACPI: PCI Interrupt 0000:01:01.1[B] -> GSI 28 (level, low) -> IRQ 17
eth1: Tigon3 [partno(BCM95704A6) rev 2100 PHY(5704)] (PCIX:66MHz:64-bit) 
10/100/1000BaseT Ethernet 00:14:5e:1b:03:e3
eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] Split[0] WireSpeed[1] 
TSOcap[1]
eth1: dma_rwctrl[769f0000]
GSI 18 sharing vector 0xB9 and IRQ 18
ACPI: PCI Interrupt 0000:0f:01.0[A] -> GSI 94 (level, low) -> IRQ 18
eth2: Tigon3 [partno(BCM95704A6) rev 2100 PHY(5704)] (PCIX:66MHz:64-bit) 
10/100/1000BaseT Ethernet 00:14:5e:1b:03:62
eth2: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] Split[0] WireSpeed[1] 
TSOcap[0]
eth2: dma_rwctrl[769f0000]
GSI 19 sharing vector 0xC1 and IRQ 19
ACPI: PCI Interrupt 0000:0f:01.1[B] -> GSI 98 (level, low) -> IRQ 19
eth3: Tigon3 [partno(BCM95704A6) rev 2100 PHY(5704)] (PCIX:66MHz:64-bit) 
10/100/1000BaseT Ethernet 00:14:5e:1b:03:63
eth3: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] Split[0] WireSpeed[1] 
TSOcap[1]
eth3: dma_rwctrl[769f0000]
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <maxk@xxxxxxxxxxxx>
Xen virtual console successfully installed as ttyS0
Event-channel device installed.
blkif_init: reqs=64, pages=704, mmap_vstart=0xffff88003e400000
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
SvrWks CSB6: IDE controller at PCI slot 0000:00:0f.1
SvrWks CSB6: chipset revision 160
SvrWks CSB6: not 100% native mode: will probe irqs later
   ide0: BM-DMA at 0x0700-0x0707, BIOS settings: hda:DMA, hdb:DMA
SvrWks CSB6: simplex device: DMA disabled
ide1: SvrWks CSB6 Bus-Master DMA disabled (BIOS)
hda: HL-DT-STDVD-ROM GDR8082N, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: ATAPI 24X DVD-ROM drive, 256kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
Adaptec aacraid driver (1.1-4 Feb  2 2006 06:37:35)
3ware Storage Controller device driver for Linux v1.26.02.001.
usbmon: debugfs is not available
GSI 20 sharing vector 0xC9 and IRQ 20
ACPI: PCI Interrupt 0000:00:03.0[A] -> GSI 20 (level, low) -> IRQ 20
ohci_hcd 0000:00:03.0: OHCI Host Controller
ohci_hcd 0000:00:03.0: new USB bus registered, assigned bus number 1
ohci_hcd 0000:00:03.0: irq 20, io mem 0xf3410000
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:03.1[B] -> GSI 20 (level, low) -> IRQ 20
ohci_hcd 0000:00:03.1: OHCI Host Controller
ohci_hcd 0000:00:03.1: new USB bus registered, assigned bus number 2
ohci_hcd 0000:00:03.1: irq 20, io mem 0xf3411000
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
GSI 21 sharing vector 0xD1 and IRQ 21
ACPI: PCI Interrupt 0000:0e:03.0[A] -> GSI 90 (level, low) -> IRQ 21
ohci_hcd 0000:0e:03.0: OHCI Host Controller
ohci_hcd 0000:0e:03.0: new USB bus registered, assigned bus number 3
ohci_hcd 0000:0e:03.0: irq 21, io mem 0xf8000000
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:0e:03.1[B] -> GSI 90 (level, low) -> IRQ 21
ohci_hcd 0000:0e:03.1: OHCI Host Controller
ohci_hcd 0000:0e:03.1: new USB bus registered, assigned bus number 4
ohci_hcd 0000:0e:03.1: irq 21, io mem 0xf8001000
usb 2-1: new full speed USB device using ohci_hcd and address 2
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
USB Universal Host Controller Interface driver v2.3
input: IBM PPC I/F as /class/input/input0
input: USB HID v1.10 Keyboard [IBM PPC I/F] on usb-0000:00:03.1-1
input: IBM PPC I/F as /class/input/input1
input: USB HID v1.10 Mouse [IBM PPC I/F] on usb-0000:00:03.1-1
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
mice: PS/2 mouse device common for all mice
md: linear personality registered as nr 1
md: raid0 personality registered as nr 2
md: raid1 personality registered as nr 3
md: multipath personality registered as nr 7
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 4.39
device-mapper: 4.4.0-ioctl (2005-01-12) initialised: dm-devel@xxxxxxxxxx
device-mapper: dm-multipath version 1.0.4 loaded
device-mapper: dm-round-robin version 1.0.0 loaded
device-mapper: dm-emc version 0.0.3 loaded
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 6, 262144 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
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
input: AT Translated Set 2 keyboard as /class/input/input2
Bridge firewalling registered
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
Root-NFS: No NFS server available, giving up.
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Insert root floppy and press ENTER
usb 4-1: new full speed USB device using ohci_hcd and address 2
input: IBM PPC I/F as /class/input/input3
input: USB HID v1.10 Keyboard [IBM PPC I/F] on usb-0000:0e:03.1-1
input: IBM PPC I/F as /class/input/input4
input: USB HID v1.10 Mouse [IBM PPC I/F] on usb-0000:0e:03.1-1

VFS: Cannot open root device "sda2" or unknown-block(2,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on 
unknown-block(2,0)
--
Regards,

David F Barrera
Linux Technology Center
Systems and Technology Group, IBM

"The wisest men follow their own direction. "
                                                       Euripides




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