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[linux-lvm] Kernel oops on 2.6.17.13 while resizing logical volume (data loss)




Dear LVM maintainers,

(JFS maintainer CC'ed because of crash on LVM + JFS)

Today I encountered a kernel oops while resizing one of our logical volumes. Others at the office have encountered this oops before, but until now I haven't had the chance to get to the oops message itself.

A short description of the machine:

* The machine is a Dell PowerEdge 2850 (megaraid_mbox 4e/Di SCSI)
* There are 6 disks in a RAID5 setup (one large logical disk)
* The machine had medium load overall
* The machine had low load on the partition to be resized

Output of lsmod and lspci -vv attached.

Description of the setup:

* The machine was running a vanilla Linux 2.6.17.8
* The machine was running Debian Sarge (lvm2 2.01.04-5)
* 80% of the RAID5 array covered by LVM2
* One volume group
* Five logical volumes

About the crash:

* I was using lvextend -L +100G /dev/srv/home
* Oops happend during resize
* The partition in question had a JFS filesystem
* Resizing the largest logical volume
* Resizing from 150 to 250 GB
* Partition was mounted read/write (online)
* Two other resizes had finished succesfully happened before
  the kernel oops occurred

After a reboot:

* Second attempt at lvresize succeeded after reboot
* mount -o remount,resize of filesystem succeeded

It seems like this bug is only triggered on consecutive resize attempts, but I cannot confirm this.

Output of vgs and lvs attached (unfortunately only of the new situation)

The oops itself:

See attached file. Please note the NULL pointer and memory allocation function references.

I hope this information is complete. If you require any more information about this, please don't hesitate to contact me. If you do, please CC me, I'm not on any of the LVS lists.

Thanks for your time,


Sincerely,

Allard Hoeve
root db1 ~ # lvs
  LV      VG   Attr   LSize   Origin Snap%  Move Copy%
  configs srv  -wi-ao   1.00G
  db      srv  -wi-ao  64.65G
  debian  srv  -wi-ao   4.00G
  home    srv  -wi-ao 246.48G
  webapps srv  -wi-ao   1.00G
  www     srv  -wi-ao   1.00G
root db1 ~ # vgs
  VG   #PV #LV #SN Attr  VSize   VFree
  srv    1   6   0 wz--n 388.26G 70.12G
root db1 ~ #

Module                  Size  Used by
nfsd                   98536  8
ipv6                  236960  24
ehci_hcd               30472  0
uhci_hcd               21132  0
usbcore               115712  3 ehci_hcd,uhci_hcd
ide_cd                 39172  0
cdrom                  40096  1 ide_cd
shpchp                 37920  0
pci_hotplug            28092  1 shpchp

0000:00:00.0 Host bridge: Intel Corp. Server Memory Controller Hub (rev 09)
	Subsystem: Dell: Unknown device 016d
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Capabilities: [40] #09 [4105]

0000:00:02.0 PCI bridge: Intel Corp. Memory Controller Hub PCI Express Port A0 (rev 09) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=00, secondary=01, subordinate=03, sec-latency=0
	Memory behind bridge: fe800000-feafffff
	Prefetchable memory behind bridge: 00000000f8000000-00000000f8000000
	Secondary status: SERR
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable-
		Address: fee00000  Data: 0000
	Capabilities: [64] #10 [0041]

0000:00:04.0 PCI bridge: Intel Corp. Memory Controller Hub PCI Express Port B0 (rev 09) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable-
		Address: fee00000  Data: 0000
	Capabilities: [64] #10 [0041]

0000:00:05.0 PCI bridge: Intel Corp. Memory Controller Hub PCI Express Port B1 (rev 09) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=00, secondary=05, subordinate=07, sec-latency=0
	I/O behind bridge: 0000d000-0000efff
	Memory behind bridge: fe300000-fe7fffff
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable-
		Address: fee00000  Data: 0000
	Capabilities: [64] #10 [0041]

0000:00:06.0 PCI bridge: Intel Corp. Memory Controller Hub PCI Express Port C0 (rev 09) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=00, secondary=08, subordinate=0a, sec-latency=0
	Memory behind bridge: fe200000-fe2fffff
	Secondary status: SERR
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable-
		Address: fee00000  Data: 0000
	Capabilities: [64] #10 [0041]

0000:00:1d.0 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #1 (rev 02) (prog-if 00 [UHCI])
	Subsystem: Dell: Unknown device 016d
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin A routed to IRQ 169
	Region 4: I/O ports at bce0 [size=32]

0000:00:1d.1 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #2 (rev 02) (prog-if 00 [UHCI])
	Subsystem: Dell: Unknown device 016d
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin B routed to IRQ 201
	Region 4: I/O ports at bcc0 [size=32]

0000:00:1d.2 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #3 (rev 02) (prog-if 00 [UHCI])
	Subsystem: Dell: Unknown device 016d
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin C routed to IRQ 209
	Region 4: I/O ports at bca0 [size=32]

0000:00:1d.7 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller (rev 02) (prog-if 20 [EHCI])
	Subsystem: Dell: Unknown device 016d
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin D routed to IRQ 217
	Region 0: Memory at feb00000 (32-bit, non-prefetchable) [size=1K]
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [58] #0a [20a0]

0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev c2) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Bus: primary=00, secondary=0b, subordinate=0b, sec-latency=32
	I/O behind bridge: 0000c000-0000cfff
	Memory behind bridge: fe000000-fe1fffff
	Prefetchable memory behind bridge: f0000000-f7ffffff
	BridgeCtl: Parity+ SERR+ NoISA- VGA+ MAbort- >Reset- FastB2B-

0000:00:1f.0 ISA bridge: Intel Corp. 82801EB/ER (ICH5/ICH5R) LPC Bridge (rev 02)
	Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0

0000:00:1f.1 IDE interface: Intel Corp. 82801EB/ER (ICH5/ICH5R) Ultra ATA 100 Storage Controller (rev 02) (prog-if 8a [Master SecP PriP])
	Subsystem: Dell: Unknown device 016d
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin A routed to IRQ 0
	Region 0: I/O ports at <unassigned>
	Region 1: I/O ports at <unassigned>
	Region 2: I/O ports at <unassigned>
	Region 3: I/O ports at <unassigned>
	Region 4: I/O ports at fc00 [size=16]
	Region 5: Memory at 80000000 (32-bit, non-prefetchable) [size=1K]

0000:01:00.0 PCI bridge: Intel Corp. 80332 [Dobson] I/O processor (rev 06) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=01, secondary=02, subordinate=02, sec-latency=64
	Memory behind bridge: fe900000-feafffff
	Prefetchable memory behind bridge: 00000000f8000000-00000000f8000000
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [44] #10 [0071]
	Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [6c] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d8] 
0000:01:00.2 PCI bridge: Intel Corp. 80332 [Dobson] I/O processor (rev 06) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=01, secondary=03, subordinate=03, sec-latency=64
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [44] #10 [0071]
	Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [6c] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d8] 
0000:02:0e.0 RAID bus controller: Dell PowerEdge Expandable RAID controller 4 (rev 06)
	Subsystem: Dell PowerEdge Expandable RAID Controller 4e/Di
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping+ SERR+ FastB2B-
	Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64 (32000ns min), Cache Line Size: 0x10 (64 bytes)
	Interrupt: pin A routed to IRQ 193
	Region 0: Memory at f80f0000 (32-bit, prefetchable) [size=64K]
	Region 2: Memory at fe9c0000 (32-bit, non-prefetchable) [size=256K]
	Expansion ROM at fea00000 [disabled] [size=128K]
	Capabilities: [c0] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d0] Message Signalled Interrupts: 64bit+ Queue=0/1 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [e0] PCI-X non-bridge device.
		Command: DPERE- ERO- RBC=0 OST=3
		Status: Bus=2 Dev=14 Func=0 64bit+ 133MHz+ SCD- USC-, DC=bridge, DMMRBC=1, DMOST=3, DMCRS=1, RSCEM-

0000:05:00.0 PCI bridge: Intel Corp. PCI Bridge Hub A (rev 09) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=05, secondary=06, subordinate=06, sec-latency=32
	I/O behind bridge: 0000e000-0000efff
	Memory behind bridge: fe600000-fe7fffff
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [44] #10 [0071]
	Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [6c] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d8] 
0000:05:00.2 PCI bridge: Intel Corp. PCI Bridge Hub B (rev 09) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=05, secondary=07, subordinate=07, sec-latency=32
	I/O behind bridge: 0000d000-0000dfff
	Memory behind bridge: fe400000-fe5fffff
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [44] #10 [0071]
	Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [6c] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d8] 
0000:06:07.0 Ethernet controller: Intel Corp. 82541GI/PI Gigabit Ethernet Controller (rev 05)
	Subsystem: Dell: Unknown device 016d
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
	Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32 (63750ns min), Cache Line Size: 0x10 (64 bytes)
	Interrupt: pin A routed to IRQ 177
	Region 0: Memory at fe6e0000 (32-bit, non-prefetchable) [size=128K]
	Region 2: I/O ports at ecc0 [size=64]
	Capabilities: [dc] Power Management version 2
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=1 PME-
	Capabilities: [e4] PCI-X non-bridge device.
		Command: DPERE- ERO+ RBC=0 OST=0
		Status: Bus=0 Dev=0 Func=0 64bit- 133MHz- SCD- USC-, DC=simple, DMMRBC=2, DMOST=0, DMCRS=0, RSCEM-

0000:07:08.0 Ethernet controller: Intel Corp. 82541GI/PI Gigabit Ethernet Controller (rev 05)
	Subsystem: Dell: Unknown device 016d
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
	Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32 (63750ns min), Cache Line Size: 0x10 (64 bytes)
	Interrupt: pin A routed to IRQ 185
	Region 0: Memory at fe4e0000 (32-bit, non-prefetchable) [size=128K]
	Region 2: I/O ports at dcc0 [size=64]
	Capabilities: [dc] Power Management version 2
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=1 PME-
	Capabilities: [e4] PCI-X non-bridge device.
		Command: DPERE- ERO+ RBC=0 OST=0
		Status: Bus=0 Dev=0 Func=0 64bit- 133MHz- SCD- USC-, DC=simple, DMMRBC=2, DMOST=0, DMCRS=0, RSCEM-

0000:08:00.0 PCI bridge: Intel Corp. PCI Bridge Hub A (rev 09) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=08, secondary=09, subordinate=09, sec-latency=64
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [44] #10 [0071]
	Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [6c] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d8] 
0000:08:00.2 PCI bridge: Intel Corp. PCI Bridge Hub B (rev 09) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 0x10 (64 bytes)
	Bus: primary=08, secondary=0a, subordinate=0a, sec-latency=64
	BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
	Capabilities: [44] #10 [0071]
	Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [6c] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d8] 
0000:0b:0d.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE] (prog-if 00 [VGA])
	Subsystem: Dell: Unknown device 016d
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop+ ParErr- Stepping+ SERR+ FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32 (2000ns min), Cache Line Size: 0x10 (64 bytes)
	Interrupt: pin A routed to IRQ 7
	Region 0: Memory at f0000000 (32-bit, prefetchable) [size=128M]
	Region 1: I/O ports at cc00 [size=256]
	Region 2: Memory at fe0f0000 (32-bit, non-prefetchable) [size=64K]
	Expansion ROM at fe000000 [disabled] [size=128K]
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

BUG: unable to handle kernel NULL pointer dereference at virtual address 00000004
 printing eip:
c02c0d4f
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in: nfsd ipv6 ehci_hcd uhci_hcd usbcore ide_cd cdrom shpchp pci_hotplug
CPU:    2
EIP:    0060:[<c02c0d4f>]    Not tainted VLI
EFLAGS: 00010292   (2.6.17.8-fwsh-byte-2 #4)
EIP is at generic_make_request+0x11/0x14b
eax: 00000008   ebx: 00000000   ecx: 00000000   edx: c201da00
esi: cb1fe580   edi: cb1fe580   ebp: 00001000   esp: e763fd1c
ds: 007b   es: 007b   ss: 0068
Process lvextend (pid: 21726, threadinfo=e763e000 task=c22f8540)
Stack: 00000001 00000000 00000000 00000000 00000000 00000292 00000000 00000000
       00011200 c013f6ef dff141c0 00011200 00000286 00000286 00000000 cb1fe580
       00000010 dff4b780 c02c0eec cb1fe580 00000008 cb1fe580 00000000 dfe19320
Call Trace:
 <c013f6ef> mempool_alloc+0x33/0xe0  <c02c0eec> submit_bio+0x63/0x100
 <c0161149> bio_alloc_bioset+0x8e/0x159  <c0161234> bio_alloc+0x20/0x2f
 <c022f384> lbmRead+0xbc/0x147  <c022f8eb> lbmIODone+0x18b/0x20b
 <c0161234> bio_alloc+0x20/0x2f  <c022f648> lbmStartIO+0xab/0xcc
 <c022ee05> lmLogShutdown+0xc8/0x11e  <c0232e3f> txQuiesce+0x11b/0x123
 <c0212020> jfs_write_super_lockfs+0x3a/0x4c  <c015d5b2> freeze_bdev+0x7b/0x7d
 <c03b15d4> lock_fs+0x23/0x77  <c0163f62> bdev_set+0x0/0x13
 <c03b172d> dm_suspend+0xc1/0x224  <c0116c62> default_wake_function+0x0/0x12
 <c03b3d21> __get_name_cell+0x13/0x60  <c0116c62> default_wake_function+0x0/0x12
 <c03b48ea> find_device+0x4d/0xc3  <c03b4c42> do_suspend+0x7c/0x84
 <c03b59ab> ctl_ioctl+0xe8/0x13b  <c03b4dd6> dev_suspend+0x0/0x18
 <c016f14b> do_ioctl+0x6f/0x96  <c016f324> vfs_ioctl+0x65/0x1d0
 <c016f4f6> sys_ioctl+0x67/0x91  <c0102bcf> sysenter_past_esp+0x54/0x75
Code: 54 24 08 e8 48 b6 e5 ff b8 02 00 00 00 f0 0f ab 43 10 8b 5c 24 3c 83 c4 40 c3 55 57 56 53 83 ec 38 8b 7c 24 4c 8b 4f 0c 8b 6f 20 <8b> 41 04 c1 ed 09 8b 50 40 8b 40 3c 0f ac d0 09 c1 fa 09 89 d3
EIP: [<c02c0d4f>] generic_make_request+0x11/0x14b SS:ESP 0068:e763fd1c
 BUG: lvextend/21726, lock held at task exit time!
 [f747f074] {init_once}
.. held by:          lvextend:21726 [c22f8540, 102]
... acquired at:               freeze_bdev+0x17/0x7d


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