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[Bug 1065159] Re: ipv6 routing memory leak

 

Hi,

I'd really like to help you, but I had to upgrade to 12.10 to get a
working environment again.

If the 12.10 information helps you as well, let me know and I'll add the
required info.

KR,

Grimeton.

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https://bugs.launchpad.net/bugs/1065159

Title:
  ipv6 routing memory leak

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Hello,

  I'm running 12.04.1 LTS with the main kernel, all requested
  information is at the end of this report. As the server does not have
  any GUI, I'm not able to use the apport reporting tools, as no browser
  can be opened.

  When using IPv6 with routing and ndp proxy enabled
  (net.ipv6.conf.all.proxy_ndp=1, net.ipv6.conf.default_proxy=1), the
  routing table/cache becomes filled and  is not releasing memory.

  I first faced this problem three days ago, when some VMs became
  offline and couldn't be reached anymore. While trying to solve the
  problem, I hit the following error when adding routes after deleting
  the old ones:

  root@server:~# ip -6 route add default via 2001:db8::1
  RTNETLINK answers: Cannot allocate memory
  root@server:~# 

  After examining /proc and /proc/sys, I figured out that the size of
  /proc/net/ipv6_route was above the value set in sysctl:

  root@server:/proc/net# cat ipv6_route | wc -c
  5174
  root@server:/proc/net# sysctl net.ipv6.route.max_size
  net.ipv6.route.max_size = 4096
  root@server:/proc/net# 

  Actually there are only 10 routes in the routing table and there
  aren't any added or deleted by any KNOWN scripts automagically and
  yes, I know, that the text representation of /proc/sys/ipv6_route can
  be bigger than the sysctl value, 4096.

  After further tests, I figured out that I'm able to fix the problem by
  changing the value of net.ipv6.route.max_size to 8192. Adding the
  routes and the proxy entries for the machines to the table and it all
  started working again, till now.

  Now the size of ipv6_route is:

  root@server:/proc/net# cat ipv6_route | wc -c
  6324
  root@server:/proc/net# sysctl net.ipv6.route.max_size
  net.ipv6.route.max_size = 8192
  root@server:/proc/net# 

  And I can see the exact same problem again, when I try to re-add the
  routes. So changing net.ipv6.route.max_size to 16384 solves the
  problem once again for a few hours and I'm waiting for the moment the
  IPv6 stuff stops working again.

  The main configuration to enable everything that is used, is as
  follows:

  You have a subnet: 2001:db8::/64 that can be used for virtual machines
  that are connected to an internal bridge, that is called "brint". The
  interface that operates to the outside is eth0. The default gateway is
  2001:db8::dead:beef:1/128 (yes, in a different subnet).

  - Enable IPv6 NDP proxying
    Set net.ipv6.conf.all.proxy_ndp=1, net.ipv6.conf.default.proxy_ndp=1 and net.ipv6.conf.eth0.proxy_ndp=1

  - Enable IPv6 forwarding
    Set net.ipv6.conf.all.forwarding=1 and net.ipv6.conf.default.forwarding=1

  - Create the bridge
    ip link add dev brint type bridge && ip link set dev brint up

  - Assign an IPv6 address to the network interface that operates to the outside (eth0)
    ip -6 addr add 2001:db8::1/64 dev eth0 && ip link set dev eth0 up

  - Assign an IPv6 address to the bridge (brint)
    ip -6 addr add 2001:db8::1/64 dev brint

  - To make sure the subnet is routed only to brint, delete the default route added by the kernel on eth0
    ip -6 route del 2001:db8::/64 dev eth0

  - Now add the route to the gateway on eth0
    ip -6 route add 2001:db8::dead:beef:1/128 dev eth0

  - Add the NDP proxy entries for the machines on brint
    ip -6 neigh add proxy 2001:db8::2 dev eth0
    ip -6 neigh add proxy 2001:db8::3 dev eth0

  As the subnet 2001:db8::/64 is link local for the external gateway,
  NDP requests are sent and the system now answers them and forwards the
  packets received on eth0 to the VMs that are in the neighbour list for
  brint.

  The VMs on the "inside" just use a simple setup like: 2001:db8::2/64
  as address and 2001:db8::1 as default gateway.

  Now wait and watch the buffer become filled and the memory become not
  released.

  If you have any questions, feel free to contact me.

  KR,

  Grimeton

  1) cat /proc/version_signature
  Ubuntu 3.2.0-31.50-generic 3.2.28

  2) lspci -vnvn

  00:00.0 Host bridge [0600]: Intel Corporation 2nd Generation Core Processor Family DRAM Controller [8086:0100] (rev 09)
  	Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe Motherboard [1043:844d]
  	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
  	Latency: 0
  	Capabilities: [e0] Vendor Specific Information: Len=0c <?>
  	Kernel driver in use: agpgart-intel

  00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port [8086:0101] (rev 09) (prog-if 00 [Normal decode])
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
  	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
  	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
  	Capabilities: [88] Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
  	Capabilities: [80] Power Management version 3
  		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  		Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
  	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
  		Address: feeff00c  Data: 4161
  	Capabilities: [a0] Express (v2) Root Port (Slot+), MSI 00
  		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
  			ExtTag- RBE+ FLReset-
  		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
  			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
  			MaxPayload 128 bytes, MaxReadReq 128 bytes
  		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
  		LnkCap:	Port #2, Speed 5GT/s, Width x16, ASPM unknown, Latency L0 <1us, L1 <4us
  			ClockPM- Surprise- LLActRep- BwNot+
  		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
  			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  		LnkSta:	Speed 2.5GT/s, Width x0, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
  		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
  			Slot #0, PowerLimit 0.000W; Interlock- NoCompl+
  		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
  			Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
  		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
  			Changed: MRL- PresDet- LinkState-
  		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna+ CRSVisible-
  		RootCap: CRSVisible-
  		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
  		DevCap2: Completion Timeout: Not Supported, TimeoutDis- ARIFwd-
  		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
  		LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
  			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
  			 Compliance De-emphasis: -6dB
  		LnkSta2: Current De-emphasis Level: -6dB
  	Capabilities: [100 v1] Virtual Channel
  		Caps:	LPEVC=0 RefClk=100ns PATEntryBits=1
  		Arb:	Fixed- WRR32- WRR64- WRR128-
  		Ctrl:	ArbSelect=Fixed
  		Status:	InProgress-
  		VC0:	Caps:	PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
  			Arb:	Fixed+ WRR32- WRR64- WRR128- TWRR128- WRR256-
  			Ctrl:	Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
  			Status:	NegoPending- InProgress-
  	Capabilities: [140 v1] Root Complex Link
  		Desc:	PortNumber=02 ComponentID=01 EltType=Config
  		Link0:	Desc:	TargetPort=00 TargetComponent=01 AssocRCRB- LinkType=MemMapped LinkValid+
  			Addr:	00000000fed19000
  	Kernel driver in use: pcieport
  	Kernel modules: shpchp

  00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0102] (rev 09) (prog-if 00 [VGA controller])
  	Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0
  	Interrupt: pin A routed to IRQ 55
  	Region 0: Memory at fe000000 (64-bit, non-prefetchable) [size=4M]
  	Region 2: Memory at c0000000 (64-bit, prefetchable) [size=256M]
  	Region 4: I/O ports at f000 [size=64]
  	Expansion ROM at <unassigned> [disabled]
  	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
  		Address: feeff00c  Data: 414a
  	Capabilities: [d0] Power Management version 2
  		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
  		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
  	Capabilities: [a4] PCI Advanced Features
  		AFCap: TP+ FLR+
  		AFCtrl: FLR-
  		AFStatus: TP-
  	Kernel driver in use: i915
  	Kernel modules: i915

  00:16.0 Communication controller [0780]: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 [8086:1c3a] (rev 04)
  	Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe Motherboard [1043:844d]
  	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0
  	Interrupt: pin A routed to IRQ 54
  	Region 0: Memory at fe504000 (64-bit, non-prefetchable) [size=16]
  	Capabilities: [50] Power Management version 3
  		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  		Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
  	Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
  		Address: 00000000feeff00c  Data: 4142
  	Kernel driver in use: mei
  	Kernel modules: mei

  00:1a.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 05) (prog-if 20 [EHCI])
  	Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe Motherboard [1043:844d]
  	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0
  	Interrupt: pin A routed to IRQ 23
  	Region 0: Memory at fe503000 (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 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
  	Capabilities: [58] Debug port: BAR=1 offset=00a0
  	Capabilities: [98] PCI Advanced Features
  		AFCap: TP+ FLR+
  		AFCtrl: FLR-
  		AFStatus: TP-
  	Kernel driver in use: ehci_hcd

  00:1c.0 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 [8086:1c10] (rev b5) (prog-if 00 [Normal decode])
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
  	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
  	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
  	Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
  		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
  			ExtTag- RBE+ FLReset-
  		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
  			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
  			MaxPayload 128 bytes, MaxReadReq 128 bytes
  		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
  		LnkCap:	Port #1, Speed 5GT/s, Width x4, ASPM L0s L1, Latency L0 <1us, L1 <4us
  			ClockPM- Surprise- LLActRep+ BwNot-
  		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
  			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  		LnkSta:	Speed 2.5GT/s, Width x0, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
  		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
  			Slot #0, PowerLimit 25.000W; Interlock- NoCompl+
  		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
  			Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
  		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
  			Changed: MRL- PresDet- LinkState-
  		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna+ CRSVisible-
  		RootCap: CRSVisible-
  		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
  		DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd-
  		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
  		LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
  			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
  			 Compliance De-emphasis: -6dB
  		LnkSta2: Current De-emphasis Level: -3.5dB
  	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
  		Address: feeff00c  Data: 4169
  	Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
  	Capabilities: [a0] Power Management version 2
  		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
  	Kernel driver in use: pcieport
  	Kernel modules: shpchp

  00:1c.5 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 [8086:1c1a] (rev b5) (prog-if 00 [Normal decode])
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
  	Memory behind bridge: fe400000-fe4fffff
  	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
  	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
  	Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
  		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
  			ExtTag- RBE+ FLReset-
  		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
  			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
  			MaxPayload 128 bytes, MaxReadReq 128 bytes
  		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
  		LnkCap:	Port #6, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <4us
  			ClockPM- Surprise- LLActRep+ BwNot-
  		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
  			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  		LnkSta:	Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt-
  		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
  			Slot #5, PowerLimit 10.000W; Interlock- NoCompl+
  		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
  			Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
  		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock-
  			Changed: MRL- PresDet- LinkState+
  		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna+ CRSVisible-
  		RootCap: CRSVisible-
  		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
  		DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd-
  		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
  		LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
  			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
  			 Compliance De-emphasis: -6dB
  		LnkSta2: Current De-emphasis Level: -6dB
  	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
  		Address: feeff00c  Data: 4171
  	Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
  	Capabilities: [a0] Power Management version 2
  		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
  	Kernel driver in use: pcieport
  	Kernel modules: shpchp

  00:1c.6 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 7 [8086:1c1c] (rev b5) (prog-if 00 [Normal decode])
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
  	I/O behind bridge: 0000e000-0000efff
  	Prefetchable memory behind bridge: 00000000d0000000-00000000d00fffff
  	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
  	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
  	Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
  		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
  			ExtTag- RBE+ FLReset-
  		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
  			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
  			MaxPayload 128 bytes, MaxReadReq 128 bytes
  		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
  		LnkCap:	Port #7, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <4us
  			ClockPM- Surprise- LLActRep+ BwNot-
  		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
  			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt-
  		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
  			Slot #6, PowerLimit 10.000W; Interlock- NoCompl+
  		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
  			Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
  		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock-
  			Changed: MRL- PresDet- LinkState+
  		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna+ CRSVisible-
  		RootCap: CRSVisible-
  		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
  		DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd-
  		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
  		LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
  			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
  			 Compliance De-emphasis: -6dB
  		LnkSta2: Current De-emphasis Level: -3.5dB
  	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
  		Address: feeff00c  Data: 4179
  	Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
  	Capabilities: [a0] Power Management version 2
  		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
  	Kernel driver in use: pcieport
  	Kernel modules: shpchp

  00:1c.7 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev b5) (prog-if 01 [Subtractive decode])
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Bus: primary=00, secondary=05, subordinate=06, sec-latency=0
  	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
  	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
  	Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
  		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
  			ExtTag- RBE+ FLReset-
  		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
  			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
  			MaxPayload 128 bytes, MaxReadReq 128 bytes
  		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
  		LnkCap:	Port #8, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <1us, L1 <4us
  			ClockPM- Surprise- LLActRep+ BwNot-
  		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
  			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt- ABWMgmt-
  		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
  			Slot #7, PowerLimit 10.000W; Interlock- NoCompl+
  		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
  			Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
  		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock-
  			Changed: MRL- PresDet- LinkState+
  		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
  		RootCap: CRSVisible-
  		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
  		DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd-
  		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
  		LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
  			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
  			 Compliance De-emphasis: -6dB
  		LnkSta2: Current De-emphasis Level: -3.5dB
  	Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
  		Address: 00000000  Data: 0000
  	Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
  	Capabilities: [a0] Power Management version 2
  		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-

  00:1d.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 [8086:1c26] (rev 05) (prog-if 20 [EHCI])
  	Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe Motherboard [1043:844d]
  	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0
  	Interrupt: pin A routed to IRQ 23
  	Region 0: Memory at fe502000 (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 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
  	Capabilities: [58] Debug port: BAR=1 offset=00a0
  	Capabilities: [98] PCI Advanced Features
  		AFCap: TP+ FLR+
  		AFCtrl: FLR-
  		AFStatus: TP-
  	Kernel driver in use: ehci_hcd

  00:1f.0 ISA bridge [0601]: Intel Corporation H67 Express Chipset Family LPC Controller [8086:1c4a] (rev 05)
  	Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0
  	Capabilities: [e0] Vendor Specific Information: Len=0c <?>
  	Kernel modules: iTCO_wdt

  00:1f.2 SATA controller [0106]: Intel Corporation 6 Series/C200 Series Chipset Family SATA AHCI Controller [8086:1c02] (rev 05) (prog-if 01 [AHCI 1.0])
  	Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe Motherboard [1043:844d]
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0
  	Interrupt: pin B routed to IRQ 44
  	Region 0: I/O ports at f0b0 [size=8]
  	Region 1: I/O ports at f0a0 [size=4]
  	Region 2: I/O ports at f090 [size=8]
  	Region 3: I/O ports at f080 [size=4]
  	Region 4: I/O ports at f060 [size=32]
  	Region 5: Memory at fe501000 (32-bit, non-prefetchable) [size=2K]
  	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
  		Address: feeff00c  Data: 4189
  	Capabilities: [70] Power Management version 3
  		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-)
  		Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
  	Capabilities: [a8] SATA HBA v1.0 BAR4 Offset=00000004
  	Capabilities: [b0] PCI Advanced Features
  		AFCap: TP+ FLR+
  		AFCtrl: FLR-
  		AFStatus: TP-
  	Kernel driver in use: ahci

  00:1f.3 SMBus [0c05]: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller [8086:1c22] (rev 05)
  	Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe Motherboard [1043:844d]
  	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Interrupt: pin C routed to IRQ 4
  	Region 0: Memory at fe500000 (64-bit, non-prefetchable) [size=256]
  	Region 4: I/O ports at f040 [size=32]
  	Kernel modules: i2c-i801

  03:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller [1b21:1042] (prog-if 30 [XHCI])
  	Subsystem: ASUSTeK Computer Inc. Device [1043:8488]
  	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Interrupt: pin A routed to IRQ 17
  	Region 0: Memory at fe400000 (64-bit, non-prefetchable) [size=32K]
  	Capabilities: [50] MSI: Enable- Count=1/8 Maskable- 64bit+
  		Address: 0000000000000000  Data: 0000
  	Capabilities: [68] MSI-X: Enable+ Count=8 Masked-
  		Vector table: BAR=0 offset=00002000
  		PBA: BAR=0 offset=00002080
  	Capabilities: [78] Power Management version 3
  		Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
  		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
  	Capabilities: [80] Express (v2) Legacy Endpoint, MSI 00
  		DevCap:	MaxPayload 512 bytes, PhantFunc 0, Latency L0s <64ns, L1 <2us
  			ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
  		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
  			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
  			MaxPayload 128 bytes, MaxReadReq 512 bytes
  		DevSta:	CorrErr+ UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
  		LnkCap:	Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 unlimited, L1 unlimited
  			ClockPM- Surprise- LLActRep- BwNot-
  		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
  			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  		LnkSta:	Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
  		DevCap2: Completion Timeout: Not Supported, TimeoutDis-
  		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-
  		LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
  			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
  			 Compliance De-emphasis: -6dB
  		LnkSta2: Current De-emphasis Level: -6dB
  	Capabilities: [100 v1] Virtual Channel
  		Caps:	LPEVC=0 RefClk=100ns PATEntryBits=1
  		Arb:	Fixed- WRR32- WRR64- WRR128-
  		Ctrl:	ArbSelect=Fixed
  		Status:	InProgress-
  		VC0:	Caps:	PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
  			Arb:	Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
  			Ctrl:	Enable+ ID=0 ArbSelect=Fixed TC/VC=01
  			Status:	NegoPending- InProgress-
  	Kernel driver in use: xhci_hcd

  04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 06)
  	Subsystem: ASUSTeK Computer Inc. P8P67 and other motherboards [1043:8432]
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Interrupt: pin A routed to IRQ 53
  	Region 0: I/O ports at e000 [size=256]
  	Region 2: Memory at d0004000 (64-bit, prefetchable) [size=4K]
  	Region 4: Memory at d0000000 (64-bit, prefetchable) [size=16K]
  	Capabilities: [40] Power Management version 3
  		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
  		Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
  	Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
  		Address: 00000000feeff00c  Data: 4122
  	Capabilities: [70] Express (v2) Endpoint, MSI 01
  		DevCap:	MaxPayload 256 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us
  			ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
  		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
  			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
  			MaxPayload 128 bytes, MaxReadReq 4096 bytes
  		DevSta:	CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr+ TransPend-
  		LnkCap:	Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <64us
  			ClockPM+ Surprise- LLActRep- BwNot-
  		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
  			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
  		DevCap2: Completion Timeout: Not Supported, TimeoutDis+
  		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-
  		LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
  			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
  			 Compliance De-emphasis: -6dB
  		LnkSta2: Current De-emphasis Level: -6dB
  	Capabilities: [b0] MSI-X: Enable- Count=4 Masked-
  		Vector table: BAR=4 offset=00000000
  		PBA: BAR=4 offset=00000800
  	Capabilities: [d0] Vital Product Data
  		Unknown small resource type 00, will not decode more.
  	Capabilities: [100 v1] Advanced Error Reporting
  		UESta:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
  		UEMsk:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
  		UESvrt:	DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
  		CESta:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
  		CEMsk:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
  		AERCap:	First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
  	Capabilities: [140 v1] Virtual Channel
  		Caps:	LPEVC=0 RefClk=100ns PATEntryBits=1
  		Arb:	Fixed- WRR32- WRR64- WRR128-
  		Ctrl:	ArbSelect=Fixed
  		Status:	InProgress-
  		VC0:	Caps:	PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
  			Arb:	Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
  			Ctrl:	Enable+ ID=0 ArbSelect=Fixed TC/VC=01
  			Status:	NegoPending- InProgress-
  	Capabilities: [160 v1] Device Serial Number f8-00-00-00-68-4c-e0-00
  	Kernel driver in use: r8169
  	Kernel modules: r8169

  05:00.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge [1b21:1080] (rev 01) (prog-if 01 [Subtractive decode])
  	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Bus: primary=05, secondary=06, subordinate=06, sec-latency=32
  	Secondary status: 66MHz+ FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
  	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
  	Capabilities: [c0] Subsystem: ASUSTeK Computer Inc. Device [1043:8489]


  2-1) lsb_release -rd 
  Description:    Ubuntu 12.04.1 LTS
  Release:        12.04

  2-2) apt-cache policy linux-image-3.2.0-31-generic
  linux-image-3.2.0-31-generic:
    Installed: 3.2.0-31.50
    Candidate: 3.2.0-31.50
    Version table:
   *** 3.2.0-31.50 0
          500 http://ftp5.gwdg.de/pub/linux/debian/ubuntu/ precise-updates/main amd64 Packages
          100 /var/lib/dpkg/status

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