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Bug#679372: DOMU hangs on high load (dd)



Package: linux-image-2.6.32-5-xen-amd64
Version: 2.6.32-45


Hello everybody,

I liked to clone a xen domu installed on a LVM. So I made a snapshot of the appropriate volume, created a new volume and than I tried to copy the snapshot with dd.

#  dd if=/dev/vgvms/lamp-snap of=/dev/vgvms/lamp-new bs=1024k

But after a short while there was no response from the only existing domu anymore. In the domu kern.log I got a lots of messages like:

Jun 27 18:07:41 server04web01 kernel: [2149560.036803] INFO: task apache2:29878 blocked for more than 120 seconds.
Jun 27 18:07:41 server04web01 kernel: [2149560.036809] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jun 27 18:07:41 server04web01 kernel: [2149560.036817] apache2       D 0000000000000000     0 29878   7773 0x00000000
Jun 27 18:07:41 server04web01 kernel: [2149560.036826]  ffffffff814a11f0 0000000000000282 ffff8800ce271ab0 ffff8800ce271ab0
Jun 27 18:07:41 server04web01 kernel: [2149560.036838]  0000000000000001 ffff8801bba40210 000000000000f9e0 ffff8801466bffd8
Jun 27 18:07:41 server04web01 kernel: [2149560.036850]  0000000000015780 0000000000015780 ffff8801bba4c710 ffff8801bba4ca08
Jun 27 18:07:41 server04web01 kernel: [2149560.036862] Call Trace:
Jun 27 18:07:41 server04web01 kernel: [2149560.036870]  [<ffffffff81154866>] ? cap_inode_alloc_security+0x0/0x3
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffffa01c41ba>] ? do_get_write_access+0x22c/0x452 [jbd2]
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff810660c0>] ? wake_bit_function+0x0/0x23
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffffa01c4402>] ? jbd2_journal_get_write_access+0x22/0x33 [jbd2]
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffffa020c81e>] ? __ext4_journal_get_write_access+0x4e/0x56 [ext4]
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffffa01eacc9>] ? ext4_new_inode+0x490/0xd14 [ext4]
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff8100ecdf>] ? xen_restore_fl_direct_end+0x0/0x1
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffffa0205d7b>] ? ext4_journal_start_sb+0xd4/0x10e [ext4]
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffffa01f5003>] ? ext4_mknod+0xaf/0x14d [ext4]
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff810f7668>] ? generic_permission+0xe/0x8a
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff810f90d6>] ? vfs_mknod+0x9b/0xbc
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff812c4846>] ? unix_bind+0x19c/0x335
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff8100ecf2>] ? check_events+0x12/0x20
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff8100ecdf>] ? xen_restore_fl_direct_end+0x0/0x1
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff812529b7>] ? sys_bind+0x7a/0xb9
Jun 27 18:07:41 server04web01 kernel: [2149560.040042]  [<ffffffff81011b42>] ? system_call_fastpath+0x16/0x1b

As soon as I suspended dd, the domu was responding again.

Now some informations of my hard- and software:
# dmidecode
SMBIOS 2.6 present.
107 structures occupying 3718 bytes.
Table at 0x000EB170.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
        Vendor: American Megatrends Inc.
        Version: 1106
        Release Date: 10/17/2011
        Address: 0xF0000
        Runtime Size: 64 kB
        ROM Size: 4096 kB
        Characteristics:
                PCI is supported
                BIOS is upgradeable
                BIOS shadowing is allowed
                Boot from CD is supported
                Selectable boot is supported
                BIOS ROM is socketed
                EDD is supported
                5.25"/1.2 MB floppy services are supported (int 13h)
                3.5"/720 KB floppy services are supported (int 13h)
                3.5"/2.88 MB floppy services are supported (int 13h)
                Print screen service is supported (int 5h)
                8042 keyboard services are supported (int 9h)
                Serial services are supported (int 14h)
                Printer services are supported (int 17h)
                ACPI is supported
                USB legacy is supported
                BIOS boot specification is supported
                Targeted content distribution is supported
        BIOS Revision: 4.6

Handle 0x0001, DMI type 1, 27 bytes
System Information
        Manufacturer: System manufacturer
        Product Name: System Product Name
        Version: System Version
        Serial Number: System Serial Number
        UUID: A0BEF017-CB5B-D911-9EB9-C8600054BB82
        Wake-up Type: Power Switch
        SKU Number: SKU
        Family: To be filled by O.E.M.

Base Board Information
        Manufacturer: ASUSTeK Computer INC.
        Product Name: P8H67-M PRO
        Version: Rev 1.xx
        Serial Number: MF70BCG03603687
        Asset Tag: To be filled by O.E.M.
        Features:
                Board is a hosting board
                Board is replaceable
        Location In Chassis: To be filled by O.E.M.
        Chassis Handle: 0x0003
        Type: Motherboard
        Contained Object Handles: 0

Handle 0x0003, DMI type 3, 21 bytes
Chassis Information
        Manufacturer: Chassis Manufacture
        Type: Desktop
        Lock: Not Present
        Version: Chassis Version
        Serial Number: Chassis Serial Number
        Asset Tag: Asset-1234567890
        Boot-up State: Safe
        Power Supply State: Safe
        Thermal State: Safe
        Security Status: None
        OEM Information: 0x00000000
        Height: Unspecified
        Number Of Power Cords: 1
        Contained Elements: 0

Handle 0x0004, DMI type 4, 42 bytes
Processor Information
        Socket Designation: LGA1155
        Type: Central Processor
        Family: <OUT OF SPEC>
        Manufacturer: Intel
        ID: A7 06 02 00 FF FB EB BF
        Version: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
        Voltage: 1.0 V
        External Clock: 100 MHz
        Max Speed: 3800 MHz
        Current Speed: 3400 MHz
        Status: Populated, Enabled
        Upgrade: Other
        L1 Cache Handle: 0x0005
        L2 Cache Handle: 0x0006
        L3 Cache Handle: 0x0007
        Serial Number: To Be Filled By O.E.M.
        Asset Tag: To Be Filled By O.E.M.
        Part Number: To Be Filled By O.E.M.
        Core Count: 4
        Core Enabled: 1
        Thread Count: 2
        Characteristics:
                64-bit capable

Handle 0x0005, DMI type 7, 19 bytes
Cache Information
        Socket Designation: L1-Cache
        Configuration: Enabled, Not Socketed, Level 1
        Operational Mode: Write Back
        Location: Internal
        Installed Size: 256 KB
        Maximum Size: 256 KB
        Supported SRAM Types:
                Other
        Installed SRAM Type: Other
        Speed: Unknown
        Error Correction Type: None
        System Type: Unified
        Associativity: 8-way Set-associative

Handle 0x0006, DMI type 7, 19 bytes
Cache Information
        Socket Designation: L2-Cache
        Configuration: Enabled, Not Socketed, Level 2
        Operational Mode: Varies With Memory Address
        Location: Internal
        Installed Size: 1024 KB
        Maximum Size: 1024 KB
        Supported SRAM Types:
                Other
        Installed SRAM Type: Other
        Speed: Unknown
        Error Correction Type: None
        System Type: Unified
        Associativity: 8-way Set-associative

Handle 0x0007, DMI type 7, 19 bytes
Cache Information
        Socket Designation: L3-Cache
        Configuration: Disabled, Not Socketed, Level 3
        Operational Mode: Unknown
        Location: Internal
        Installed Size: 8192 KB
        Maximum Size: 8192 KB
        Supported SRAM Types:
                Other
        Installed SRAM Type: Other
        Speed: Unknown
        Error Correction Type: None
        System Type: Unified
        Associativity: 16-way Set-associative

Handle 0x0008, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: PS/2 Keyboard
        Internal Connector Type: None
        External Reference Designator: PS/2 Keyboard
        External Connector Type: PS/2
        Port Type: Keyboard Port

Handle 0x0009, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: USB9_10
        Internal Connector Type: None
        External Reference Designator: USB9_10
        External Connector Type: Access Bus (USB)
        Port Type: USB

Handle 0x000A, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: USB11_12
        Internal Connector Type: None
        External Reference Designator: USB11_12
        External Connector Type: Access Bus (USB)
        Port Type: USB

Handle 0x000B, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: USB13_14
        Internal Connector Type: None
        External Reference Designator: USB13_14
        External Connector Type: Access Bus (USB)
        Port Type: USB

Handle 0x000C, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: USB3_12
        Internal Connector Type: None
        External Reference Designator: USB3_12
        External Connector Type: Access Bus (USB)
        Port Type: USB

Handle 0x000D, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: GbE LAN
        Internal Connector Type: None
        External Reference Designator: GbE LAN
        External Connector Type: RJ-45
        Port Type: Network Port

Handle 0x000E, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: AUDIO
        Internal Connector Type: None
        External Reference Designator: AUDIO
        External Connector Type: Other
        Port Type: Audio Port

Handle 0x000F, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: DVI
        Internal Connector Type: None
        External Reference Designator: DVI port
        External Connector Type: Other
        Port Type: Other
Handle 0x0010, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: SPDIFO_HDMI
        Internal Connector Type: None
        External Reference Designator: HDMI port
        External Connector Type: Other
        Port Type: Other

Handle 0x0011, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: SATA3G_1
        Internal Connector Type: SAS/SATA Plug Receptacle
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: SATA

Handle 0x0012, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: SATA3G_2
        Internal Connector Type: SAS/SATA Plug Receptacle
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: SATA

Handle 0x0013, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: SATA3G_3
        Internal Connector Type: SAS/SATA Plug Receptacle
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: SATA

Handle 0x0014, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: SATA3G_4
        Internal Connector Type: SAS/SATA Plug Receptacle
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: SATA

Handle 0x0015, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: SATA6G_1
        Internal Connector Type: SAS/SATA Plug Receptacle
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: SATA

Handle 0x0016, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: SATA6G_2
        Internal Connector Type: SAS/SATA Plug Receptacle
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: SATA

Handle 0x0017, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: USB1_2
        Internal Connector Type: Access Bus (USB)
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: USB

Handle 0x0018, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: USB3_4
        Internal Connector Type: Access Bus (USB)
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: USB

Handle 0x0019, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: USB5_6
        Internal Connector Type: Access Bus (USB)
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: USB
Handle 0x001A, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: USB7_8
        Internal Connector Type: Access Bus (USB)
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: USB

Handle 0x001B, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: AAFP
        Internal Connector Type: Mini Jack (headphones)
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Audio Port

Handle 0x001C, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: CPU_FAN
        Internal Connector Type: Other
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Other

Handle 0x001D, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: CHA_FAN1
        Internal Connector Type: Other
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Other

Handle 0x001E, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: PWR_FAN
        Internal Connector Type: Other
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Other

Handle 0x001F, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: PATA_IDE
        Internal Connector Type: On Board IDE
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Other

Handle 0x0020, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: COM1
        Internal Connector Type: DB-9 male
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Serial Port 16550A Compatible

Handle 0x0021, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: LPT
        Internal Connector Type: DB-9 male
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Serial Port 16550A Compatible

Handle 0x0022, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: VGA
        Internal Connector Type: Other
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Other

Handle 0x0023, DMI type 9, 17 bytes
System Slot Information
        Designation: PCIEX16_1
        Type: 32-bit PCI Express
        Current Usage: In Use
        Length: Short
        ID: 1
        Characteristics:
                3.3 V is provided
                Opening is shared
                PME signal is supported

Handle 0x0024, DMI type 9, 17 bytes
System Slot Information
        Designation: PCIEX16_2
        Type: 32-bit PCI Express
        Current Usage: In Use
        Length: Short
        ID: 2
        Characteristics:
                3.3 V is provided
                Opening is shared
                PME signal is supported

Handle 0x0025, DMI type 9, 17 bytes
System Slot Information
        Designation: PCI1
        Type: 32-bit PCI
        Current Usage: In Use
        Length: Short
        ID: 3
        Characteristics:
                3.3 V is provided
                Opening is shared
                PME signal is supported
Handle 0x0026, DMI type 9, 17 bytes
System Slot Information
        Designation: PCI2
        Type: 32-bit PCI
        Current Usage: In Use
        Length: Short
        ID: 4
        Characteristics:
                3.3 V is provided
                Opening is shared
                PME signal is supported

Handle 0x0027, DMI type 10, 6 bytes
On Board Device Information
        Type: Ethernet
        Status: Enabled
        Description: Onboard Ethernet

Handle 0x0028, DMI type 11, 5 bytes
OEM Strings
        String 1: C8600054BB82

Handle 0x0029, DMI type 12, 5 bytes
System Configuration Options
        Option 1: To Be Filled By O.E.M.

Handle 0x002A, DMI type 16, 15 bytes
Physical Memory Array
        Location: System Board Or Motherboard
        Use: System Memory
        Error Correction Type: None
        Maximum Capacity: 32 GB
        Error Information Handle: No Error
        Number Of Devices: 4

Handle 0x002B, DMI type 18, 23 bytes
32-bit Memory Error Information
        Type: OK
        Granularity: Unknown
        Operation: Unknown
        Vendor Syndrome: Unknown
        Memory Array Address: Unknown
        Device Address: Unknown
        Resolution: Unknown

Handle 0x002C, DMI type 19, 15 bytes
Memory Array Mapped Address
        Starting Address: 0x00000000000
        Ending Address: 0x007FFFFFFFF
        Range Size: 32 GB
        Physical Array Handle: 0x002A
        Partition Width: 0

Handle 0x002D, DMI type 17, 28 bytes
Memory Device
        Array Handle: 0x002A
        Error Information Handle: No Error
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM0
        Bank Locator: BANK0
        Type: <OUT OF SPEC>
        Type Detail: Synchronous
        Speed: 1333 MHz (0.8 ns)
        Manufacturer: Undefined
        Serial Number: 0000000
        Asset Tag: AssetTagNum0
        Part Number: CL9-9-9 D3-1333

Handle 0x002E, DMI type 18, 23 bytes
32-bit Memory Error Information
        Type: OK
        Granularity: Unknown
        Operation: Unknown
        Vendor Syndrome: Unknown
        Memory Array Address: Unknown
        Device Address: Unknown
        Resolution: Unknown
Handle 0x002F, DMI type 20, 19 bytes
Memory Device Mapped Address
        Starting Address: 0x00000000000
        Ending Address: 0x001FFFFFFFF
        Range Size: 8 GB
        Physical Device Handle: 0x002D
        Memory Array Mapped Address Handle: 0x002C
        Partition Row Position: 1

Handle 0x0030, DMI type 17, 28 bytes
Memory Device
        Array Handle: 0x002A
        Error Information Handle: No Error
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM1
        Bank Locator: BANK1
        Type: <OUT OF SPEC>
        Type Detail: Synchronous
        Speed: 1333 MHz (0.8 ns)
        Manufacturer: Undefined
        Serial Number: 0000000
        Asset Tag: AssetTagNum1
        Part Number: CL9-9-9 D3-1333

Handle 0x0031, DMI type 18, 23 bytes
32-bit Memory Error Information
        Type: OK
        Granularity: Unknown
        Operation: Unknown
        Vendor Syndrome: Unknown
        Memory Array Address: Unknown
        Device Address: Unknown
        Resolution: Unknown

Handle 0x0032, DMI type 20, 19 bytes
Memory Device Mapped Address
        Starting Address: 0x00200000000
        Ending Address: 0x003FFFFFFFF
        Range Size: 8 GB
        Physical Device Handle: 0x0030
        Memory Array Mapped Address Handle: 0x002C
        Partition Row Position: 1

Handle 0x0033, DMI type 17, 28 bytes
Memory Device
        Array Handle: 0x002A
        Error Information Handle: No Error
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM2
        Bank Locator: BANK2
        Type: <OUT OF SPEC>
        Type Detail: Synchronous
        Speed: 1333 MHz (0.8 ns)
        Manufacturer: Undefined
        Serial Number: 0000000
        Asset Tag: AssetTagNum2
        Part Number: CL9-9-9 D3-1333

Handle 0x0034, DMI type 18, 23 bytes
32-bit Memory Error Information
        Type: OK
        Granularity: Unknown
        Operation: Unknown
        Vendor Syndrome: Unknown
        Memory Array Address: Unknown
        Device Address: Unknown
        Resolution: Unknown
Handle 0x0035, DMI type 20, 19 bytes
Memory Device Mapped Address
        Starting Address: 0x00400000000
        Ending Address: 0x005FFFFFFFF
        Range Size: 8 GB
        Physical Device Handle: 0x0033
        Memory Array Mapped Address Handle: 0x002C
        Partition Row Position: 1

Handle 0x0036, DMI type 17, 28 bytes
Memory Device
        Array Handle: 0x002A
        Error Information Handle: No Error
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM3
        Bank Locator: BANK3
        Type: <OUT OF SPEC>
        Type Detail: Synchronous
        Speed: 1333 MHz (0.8 ns)
        Manufacturer: Undefined
        Serial Number: 0000000
        Asset Tag: AssetTagNum3
        Part Number: CL9-9-9 D3-1333
Handle 0x0037, DMI type 18, 23 bytes
32-bit Memory Error Information
        Type: OK
        Granularity: Unknown
        Operation: Unknown
        Vendor Syndrome: Unknown
        Memory Array Address: Unknown
        Device Address: Unknown
        Resolution: Unknown

Handle 0x0038, DMI type 20, 19 bytes
Memory Device Mapped Address
        Starting Address: 0x00600000000
        Ending Address: 0x007FFFFFFFF
        Range Size: 8 GB
        Physical Device Handle: 0x0036
        Memory Array Mapped Address Handle: 0x002C
        Partition Row Position: 1

Handle 0x0039, DMI type 32, 20 bytes
System Boot Information
        Status: No errors detected

Handle 0x003A, DMI type 34, 11 bytes
Management Device
        Description: LM78-1
        Type: LM78
        Address: 0x00000000
        Address Type: I/O Port
Handle 0x003B, DMI type 26, 22 bytes
Voltage Probe
        Description: LM78A
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value: Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x003C, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 1
        Upper Non-critical Threshold: 2
        Lower Critical Threshold: 3
        Upper Critical Threshold: 4
        Lower Non-recoverable Threshold: 5
        Upper Non-recoverable Threshold: 6
Handle 0x003D, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x003A
        Component Handle: 0x003A
        Threshold Handle: 0x003B

Handle 0x003E, DMI type 28, 22 bytes
Temperature Probe
        Description: LM78A
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x003F, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 1
        Upper Non-critical Threshold: 2
        Lower Critical Threshold: 3
        Upper Critical Threshold: 4
        Lower Non-recoverable Threshold: 5
        Upper Non-recoverable Threshold: 6
Handle 0x0040, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x003A
        Component Handle: 0x003D
        Threshold Handle: 0x003E

Handle 0x0041, DMI type 27, 14 bytes
Cooling Device
        Temperature Probe Handle: 0x003E
        Type: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Cooling Unit Group: 1
        OEM-specific Information: 0x00000000
        Nominal Speed: Unknown Or Non-rotating

Handle 0x0042, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 1
        Upper Non-critical Threshold: 2
        Lower Critical Threshold: 3
        Upper Critical Threshold: 4
        Lower Non-recoverable Threshold: 5
        Upper Non-recoverable Threshold: 6

Handle 0x0043, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x003A
        Component Handle: 0x0040
        Threshold Handle: 0x0041
Handle 0x0044, DMI type 27, 14 bytes
Cooling Device
        Temperature Probe Handle: 0x003E
        Type: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Cooling Unit Group: 1
        OEM-specific Information: 0x00000000
        Nominal Speed: Unknown Or Non-rotating

Handle 0x0045, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 1
        Upper Non-critical Threshold: 2
        Lower Critical Threshold: 3
        Upper Critical Threshold: 4
        Lower Non-recoverable Threshold: 5
        Upper Non-recoverable Threshold: 6

Handle 0x0046, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x003A
        Component Handle: 0x0043
        Threshold Handle: 0x0044
Handle 0x0047, DMI type 29, 22 bytes
Electrical Current Probe
        Description: ABC
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value: Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x0048, DMI type 36, 16 bytes
Management Device Threshold Data

Handle 0x0049, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x003A
        Component Handle: 0x0046
        Threshold Handle: 0x0044
Handle 0x004A, DMI type 39, 22 bytes
System Power Supply
        Power Unit Group: 1
        Location: To Be Filled By O.E.M.
        Name: To Be Filled By O.E.M.
        Manufacturer: To Be Filled By O.E.M.
        Serial Number: To Be Filled By O.E.M.
        Asset Tag: To Be Filled By O.E.M.
        Model Part Number: To Be Filled By O.E.M.
        Revision: To Be Filled By O.E.M.
        Max Power Capacity: Unknown
        Status: Not Present
        Type: <OUT OF SPEC>
        Input Voltage Range Switching: <OUT OF SPEC>
        Plugged: Yes
        Hot Replaceable: No
        Input Voltage Probe Handle: 0x003B
        Cooling Device Handle: 0x0041
        Input Current Probe Handle: 0x0047

Handle 0x004B, DMI type 34, 16 bytes
Management Device
        Description: 2
        Type: LM78
        Address: 0x00000000
        Address Type: I/O Port
Handle 0x004C, DMI type 26, 22 bytes
Voltage Probe
        Description: LM78B
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value: Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x004D, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 7
        Upper Non-critical Threshold: 8
        Lower Critical Threshold: 8
        Upper Critical Threshold: 10
        Lower Non-recoverable Threshold: 11
        Upper Non-recoverable Threshold: 12

Handle 0x004E, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x004B
        Component Handle: 0x004B
        Threshold Handle: 0x004C

Handle 0x004F, DMI type 26, 22 bytes
Voltage Probe
        Description: LM78B
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value: Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x0050, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 13
        Upper Non-critical Threshold: 14
        Lower Critical Threshold: 15
        Upper Critical Threshold: 16
        Lower Non-recoverable Threshold: 17
        Upper Non-recoverable Threshold: 18

Handle 0x0051, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x004B
        Component Handle: 0x004E
        Threshold Handle: 0x004F
Handle 0x0052, DMI type 28, 22 bytes
Temperature Probe
        Description: LM78B
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x0053, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 1
        Upper Non-critical Threshold: 2
        Lower Critical Threshold: 3
        Upper Critical Threshold: 4
        Lower Non-recoverable Threshold: 5
        Upper Non-recoverable Threshold: 6

Handle 0x0054, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x004B
        Component Handle: 0x0051
        Threshold Handle: 0x0052
Handle 0x0055, DMI type 27, 14 bytes
Cooling Device
        Temperature Probe Handle: 0x0052
        Type: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Cooling Unit Group: 1
        OEM-specific Information: 0x00000000
        Nominal Speed: Unknown Or Non-rotating

Handle 0x0056, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 1
        Upper Non-critical Threshold: 2
        Lower Critical Threshold: 3
        Upper Critical Threshold: 4
        Lower Non-recoverable Threshold: 5
        Upper Non-recoverable Threshold: 6

Handle 0x0057, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x004B
        Component Handle: 0x0054
        Threshold Handle: 0x0055
Handle 0x0058, DMI type 28, 22 bytes
Temperature Probe
        Description: LM78B
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x0059, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 1
        Upper Non-critical Threshold: 2
        Lower Critical Threshold: 3
        Upper Critical Threshold: 4
        Lower Non-recoverable Threshold: 5
        Upper Non-recoverable Threshold: 6

Handle 0x005A, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x004B
        Component Handle: 0x0057
        Threshold Handle: 0x0058
Handle 0x005B, DMI type 27, 14 bytes
Cooling Device
        Temperature Probe Handle: 0x0058
        Type: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Cooling Unit Group: 1
        OEM-specific Information: 0x00000000
        Nominal Speed: Unknown Or Non-rotating

Handle 0x005C, DMI type 36, 16 bytes
Management Device Threshold Data
        Lower Non-critical Threshold: 1
        Upper Non-critical Threshold: 2
        Lower Critical Threshold: 3
        Upper Critical Threshold: 4
        Lower Non-recoverable Threshold: 5
        Upper Non-recoverable Threshold: 6

Handle 0x005D, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x004B
        Component Handle: 0x005A
        Threshold Handle: 0x005B

Handle 0x005E, DMI type 29, 22 bytes
Electrical Current Probe
        Description: DEF
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value: Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x005F, DMI type 36, 16 bytes
Management Device Threshold Data

Handle 0x0060, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x004B
        Component Handle: 0x005D
        Threshold Handle: 0x005B

Handle 0x0061, DMI type 29, 22 bytes
Electrical Current Probe
        Description: GHI
        Location: <OUT OF SPEC>
        Status: <OUT OF SPEC>
        Maximum Value: Unknown
        Minimum Value: Unknown
        Resolution: Unknown
        Tolerance: Unknown
        Accuracy: Unknown
        OEM-specific Information: 0x00000000
        Nominal Value: Unknown

Handle 0x0062, DMI type 36, 16 bytes
Management Device Threshold Data

Handle 0x0063, DMI type 35, 11 bytes
Management Device Component
        Description: To Be Filled By O.E.M.
        Management Device Handle: 0x004B
        Component Handle: 0x0060
        Threshold Handle: 0x005B
Handle 0x0064, DMI type 39, 22 bytes
System Power Supply
        Power Unit Group: 1
        Location: To Be Filled By O.E.M.
        Name: To Be Filled By O.E.M.
        Manufacturer: To Be Filled By O.E.M.
        Serial Number: To Be Filled By O.E.M.
        Asset Tag: To Be Filled By O.E.M.
        Model Part Number: To Be Filled By O.E.M.
        Revision: To Be Filled By O.E.M.
        Max Power Capacity: Unknown
        Status: Not Present
        Type: <OUT OF SPEC>
        Input Voltage Range Switching: <OUT OF SPEC>
        Plugged: Yes
        Hot Replaceable: No
        Input Voltage Probe Handle: 0x003B
        Cooling Device Handle: 0x0041
        Input Current Probe Handle: 0x0047

Handle 0x0065, DMI type 41, 11 bytes
Unknown Type
        Header and Data:
                29 0B 65 00 01 83 01 00 00 00 10
        Strings:
                 Onboard IGD

Handle 0x0066, DMI type 41, 11 bytes
Unknown Type
        Header and Data:
                29 0B 66 00 01 85 01 00 00 00 C8
        Strings:
                 Onboard LAN
Handle 0x0068, DMI type 139, 94 bytes
OEM-specific Type
        Header and Data:
                8B 5E 68 00 FE DC BA 98 76 54 32 10 04 04 32 55
                F8 00 A2 02 A1 00 40 63 06 11 03 34 03 DF 40 80
                00 20 00 73 3C 10 08 00 60 0F 06 11 15 04 20 00
                3C 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                00 00 00 00 69 00 00 FF FF 06 11 00 04 00 00 23
                33 00 00 00 00 00 00 00 00 00 00 00 00 01
        Strings:
                V1394GUID

Handle 0x0069, DMI type 13, 22 bytes
BIOS Language Information
        Installable Languages: 6
                eng
                fra
                ger
                chs
                chi
                jpn
        Currently Installed Language: eng

Handle 0x006A, DMI type 127, 4 bytes
End Of Table

I'm using a huge partition with linux software raid level 1 and LVM to store the xen domus.
my xen config for the domu:

#
# Configuration file for the Xen instance lamp.mynet.org, created
# by xen-tools 4.2 on Sat Jun  2 20:24:22 2012.
#

#
#  Kernel + memory size
#
kernel      = '/boot/vmlinuz-2.6.32-5-xen-amd64'
ramdisk     = '/boot/initrd.img-2.6.32-5-xen-amd64'

vcpus       = '1'
memory      = '7168'

#
#  Disk device(s).
#
root        = '/dev/xvda2 ro'
disk        = [
                  'phy:/dev/vgvms/lamp-disk,xvda2,w',
                  'phy:/dev/vgvms/lamp-swap,xvda1,w',
              ]


#
#  Physical volumes
#


#
#  Hostname
#
name        = 'lamp.mynet.org'

#
#  Networking
#
vif         = [ 'ip=1.2.3.4,mac=00:16:3E:FA:05:FF' ]

#
#  Behaviour
#
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'


I'm not sure if the bug is related to the kernel or xen or LVM, but I've read there is may a problem with the kernel scheduler (e.g. http://archimedeseureka.blogspot.de/2011/04/xen-guest-io-issue-task-blocked-for.html).
Of course I have no machine described there an also I don't have a hardware raid controller.
But I know I have cloned a domu on another machine with Lenny and XEN3.2 exactly this way and I had no problem at all.

I am using Debian GNU/Linux 6.0.5, kernel 2.6.32-5-xen-amd64 and libc6 2.11.3-3

If you need some more information just ask.

Thanks





















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