Filesystem I/O is CPU-bound in rc7 and rc8
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From: Dave Airlie on 19 Feb 2010 16:10 On Thu, Feb 18, 2010 at 6:04 AM, James Cloos <cloos(a)jhcloos.com> wrote: > While getting re-aquainted with perf, and after upgrading to the current > version, I see that do_page_fault, unmap_vmas, get_page_from_freelist, > handle_mm_fault, __do_fault and T.1339 tend to get the most time when the > kernel is spinning. dmesg? lspci -vv? We have an AGP related issue with WC/UC paging that might be related, but I'd need more info. Dave. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Mike Fedyk on 19 Feb 2010 16:30 On Sat, Feb 13, 2010 at 7:11 PM, James Cloos <cloos(a)jhcloos.com> wrote: > Sometime between rc6 and rc7 all filesystem I/O started using 100% CPU, > usually on the order of 60% sys, 40% user. > > I've tried this with each of ext4, jfs and btrfs filesystems. All show > the same issue. > Are you sure you're not running with any of the debugging options enabled? I see the same, but I have debugging enabled (rawhide kernel). > Using dd(1) to read from the block specials directly works as well and > as fast as it always has; only reading or writing to mounted filesystems > is affected. > > Box is 32-bit x86, PentiumIII-M; drives are ide using libata. > > If the btrfs fs is mounted, the slowdown is enought to trigger the > hung_task call trace (120s) on the btrfs-transac process. > > But the regression is just as apparent when only jfs and ext4 are mounted. > > The only filesystems I've found which avoid the regression are tmpfs and > devtmpfs. > > I didn't have time to write up a report when I noticed this in rc7 but > had to boot back into rc6 for work. > > Some of the commits since rc7 looked like they might have addressed this > regression, but it persists in rc8. > > -JimC > -- > James Cloos <cloos(a)jhcloos.com> OpenPGP: 1024D/ED7DAEA6 > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo(a)vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: James Cloos on 19 Feb 2010 16:40 >>>>> "Dave" == Dave Airlie <airlied(a)gmail.com> writes: Dave> On Thu, Feb 18, 2010 at 6:04 AM, James Cloos <cloos(a)jhcloos.com> wrote: >> While getting re-aquainted with perf, and after upgrading to the current >> version, I see that do_page_fault, unmap_vmas, get_page_from_freelist, >> handle_mm_fault, __do_fault and T.1339 tend to get the most time when the >> kernel is spinning. Dave> We have an AGP related issue with WC/UC paging that might be related, Dave> but I'd need more info. OK. I do use radeon kms (r100). On a lark, I tried out a non-kms boot this morning, but X never started; I was going to update all of the user-mode code (dri2, mesa, x, the ati driver, etc) before tyring again to check whether kms was required to hit the issue. That takes a few hours to do on this box. Dave> dmesg? The only reelvant part of dmesg are of the form: Feb 14 01:37:27 [kernel] [ 3720.582130] INFO: task btrfs-transacti:2527 blocked for more than 120 seconds. Feb 14 01:37:27 [kernel] [ 3720.582140] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Feb 14 01:37:27 [kernel] [ 3720.582149] btrfs-transac D da2ba5b0 0 2527 2 0x00000000 Feb 14 01:37:27 [kernel] [ 3720.582163] da33af60 00000046 c170f240 da2ba5b0 037a730a 00000343 da2ba854 da2ba5b0 Feb 14 01:37:27 [kernel] [ 3720.582181] df9557f4 da2ba5b0 df9557f8 da33af84 c152c406 df9557f8 df9557f8 da2ba5b0 Feb 14 01:37:27 [kernel] [ 3720.582199] ffffffff da212000 da33afa0 da2ba5b0 da33af8c c152bf81 da33afc0 c11b4ecc Feb 14 01:37:27 [kernel] [ 3720.582216] Call Trace: Feb 14 01:37:27 [kernel] [ 3720.582241] [<c152c406>] __mutex_lock_slowpath+0x96/0x120 Feb 14 01:37:27 [kernel] [ 3720.582253] [<c152bf81>] mutex_lock+0x11/0x20 Feb 14 01:37:27 [kernel] [ 3720.582269] [<c11b4ecc>] transaction_kthread+0xcc/0x1e0 Feb 14 01:37:27 [kernel] [ 3720.582281] [<c152b643>] ? preempt_schedule+0x33/0x50 Feb 14 01:37:27 [kernel] [ 3720.582292] [<c11b4e00>] ? transaction_kthread+0x0/0x1e0 Feb 14 01:37:27 [kernel] [ 3720.582306] [<c104c684>] kthread+0x74/0x80 Feb 14 01:37:27 [kernel] [ 3720.582316] [<c104c610>] ? kthread+0x0/0x80 Feb 14 01:37:27 [kernel] [ 3720.582328] [<c1003356>] kernel_thread_helper+0x6/0x10 Dave> lspci -vv? 00:00.0 Host bridge: Intel Corporation 82815 815 Chipset Host Bridge and Memory Controller Hub (rev 04) 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 Region 0: Memory at e8000000 (32-bit, prefetchable) [size=64M] Capabilities: [88] Vendor Specific Information <?> Capabilities: [a0] AGP version 2.0 Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4 Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x4 Kernel driver in use: agpgart-intel 00:01.0 PCI bridge: Intel Corporation 82815 815 Chipset AGP Bridge (rev 04) (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: 32 Bus: primary=00, secondary=01, subordinate=01, sec-latency=32 I/O behind bridge: 0000c000-0000cfff Memory behind bridge: fc000000-fdffffff Prefetchable memory behind bridge: e0000000-e7ffffff Secondary status: 66MHz+ FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR+ BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 03) (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 Bus: primary=00, secondary=02, subordinate=10, sec-latency=32 I/O behind bridge: 0000d000-0000ffff Memory behind bridge: f2000000-fbffffff Prefetchable memory behind bridge: 20000000-27ffffff Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- 00:1f.0 ISA bridge: Intel Corporation 82801BAM ISA Bridge (LPC) (rev 03) 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 Kernel modules: intel-rng 00:1f.1 IDE interface: Intel Corporation 82801BAM IDE U100 Controller (rev 03) (prog-if 80 [Master]) Subsystem: Intel Corporation Device 4541 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 Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8] Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1] Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8] Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable) [size=1] Region 4: I/O ports at bfa0 [size=16] Kernel driver in use: ata_piix 00:1f.2 USB Controller: Intel Corporation 82801BA/BAM USB Controller #1 (rev 03) (prog-if 00 [UHCI]) Subsystem: Intel Corporation Device 4541 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 D routed to IRQ 10 Region 4: I/O ports at bce0 [size=32] Kernel driver in use: uhci_hcd Kernel modules: uhci-hcd 01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500] (prog-if 00 [VGA controller]) Subsystem: Dell Radeon Mobility M7 LW (Dell Inspiron 8100) 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: 32 (2000ns min), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 11 Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M] Region 1: I/O ports at cc00 [size=256] Region 2: Memory at fcff0000 (32-bit, non-prefetchable) [size=64K] Expansion ROM at fc000000 [disabled] [size=128K] Capabilities: [58] AGP version 2.0 Status: RQ=48 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4 Command: RQ=32 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x4 Capabilities: [50] 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: radeon Kernel modules: radeonfb 02:03.0 Multimedia audio controller: ESS Technology ES1983S Maestro-3i PCI Audio Accelerator (rev 10) Subsystem: Dell ES1983S Maestro-3i (Dell Inspiron 8100) 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: 32 (500ns min, 6000ns max) Interrupt: pin A routed to IRQ 5 Region 0: I/O ports at dc00 [size=256] Region 1: Memory at f6ffe000 (32-bit, non-prefetchable) [size=8K] Capabilities: [c0] 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: Maestro3 02:06.0 PCI bridge: Actiontec Electronics Inc Mini-PCI bridge (rev 11) (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=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 32, Cache Line Size: 32 bytes Bus: primary=02, secondary=08, subordinate=08, sec-latency=32 I/O behind bridge: 0000e000-0000efff Memory behind bridge: f8000000-f9ffffff Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: [80] 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- Bridge: PM- B3+ Capabilities: [90] CompactPCI hot-swap <?> 02:0f.0 CardBus bridge: Texas Instruments PCI4451 PC card Cardbus Controller Subsystem: Dell PCI4451 PC card CardBus Controller (Inspiron 8100) 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: 168, Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 10 Region 0: Memory at f2000000 (32-bit, non-prefetchable) [size=4K] Bus: primary=02, secondary=09, subordinate=0c, sec-latency=176 Memory window 0: 20000000-23fff000 (prefetchable) Memory window 1: 28000000-2bfff000 I/O window 0: 0000d000-0000d0ff I/O window 1: 0000d400-0000d4ff BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset+ 16bInt+ PostWrite+ 16-bit legacy interface ports at 0001 Kernel driver in use: yenta_cardbus 02:0f.1 CardBus bridge: Texas Instruments PCI4451 PC card Cardbus Controller Subsystem: Dell PCI4451 PC card CardBus Controller (Inspiron 8100) 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: 168, Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 10 Region 0: Memory at f2001000 (32-bit, non-prefetchable) [size=4K] Bus: primary=02, secondary=0d, subordinate=10, sec-latency=176 Memory window 0: 24000000-27fff000 (prefetchable) Memory window 1: 2c000000-2ffff000 I/O window 0: 0000d800-0000d8ff I/O window 1: 0000f000-0000f0ff BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset- 16bInt- PostWrite+ 16-bit legacy interface ports at 0001 Kernel driver in use: yenta_cardbus 02:0f.2 FireWire (IEEE 1394): Texas Instruments PCI4451 IEEE-1394 Controller (prog-if 10 [OHCI]) Subsystem: Dell PCI4451 IEEE-1394 Controller (Dell Inspiron 8100) 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: 32 (500ns min, 1000ns max), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 10 Region 0: Memory at f6ffd800 (32-bit, non-prefetchable) [size=2K] Region 1: Memory at f6ff8000 (32-bit, non-prefetchable) [size=16K] Capabilities: [44] 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: firewire_ohci 08:04.0 Ethernet controller: Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 08) Subsystem: Actiontec Electronics Inc EtherExpress PRO/100B (TX) (MiniPCI Ethernet+Modem) 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: 32 (2000ns min, 14000ns max), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 10 Region 0: Memory at f8fff000 (32-bit, non-prefetchable) [size=4K] Region 1: I/O ports at ecc0 [size=64] Region 2: Memory at f8e00000 (32-bit, non-prefetchable) [size=1M] Expansion ROM at f9000000 [disabled] [size=1M] Capabilities: [dc] 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=2 PME- Kernel driver in use: e100 08:08.0 Communication controller: Agere Systems WinModem 56k (rev 01) Subsystem: Actiontec Electronics Inc LT WinModem 56k (MiniPCI Ethernet+Modem) 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 (63000ns min, 3500ns max) Interrupt: pin A routed to IRQ 10 Region 0: Memory at f8ffec00 (32-bit, non-prefetchable) [size=256] Region 1: I/O ports at ecb8 [size=8] Region 2: I/O ports at e800 [size=256] Capabilities: [f8] 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- 0d:00.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 62) (prog-if 00 [UHCI]) Subsystem: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller 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: 22, Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 10 Region 1: Memory at 2c000800 (32-bit, non-prefetchable) [size=256] Region 4: I/O ports at d880 [size=32] Capabilities: [80] 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- Kernel driver in use: uhci_hcd Kernel modules: uhci-hcd 0d:00.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 62) (prog-if 00 [UHCI]) Subsystem: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller 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: 22, Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 10 Region 1: Memory at 2c000900 (32-bit, non-prefetchable) [size=256] Region 4: I/O ports at d8a0 [size=32] Capabilities: [80] 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- Kernel driver in use: uhci_hcd Kernel modules: uhci-hcd 0d:00.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 65) (prog-if 20 [EHCI]) Subsystem: VIA Technologies, Inc. USB 2.0 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: 22, Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 10 Region 0: Memory at 2c000a00 (32-bit, non-prefetchable) [size=256] Region 1: Memory at 2c000b00 (32-bit, non-prefetchable) [size=256] Capabilities: [80] 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- Kernel driver in use: ehci_hcd Kernel modules: ehci-hcd 0d:00.3 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev 80) (prog-if 10 [OHCI]) Subsystem: VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller 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: 64 (8000ns max), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 10 Region 0: Memory at 2c000000 (32-bit, non-prefetchable) [size=2K] Region 1: I/O ports at d800 [size=128] Capabilities: [50] 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: firewire_ohci -JimC -- James Cloos <cloos(a)jhcloos.com> OpenPGP: 1024D/ED7DAEA6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: James Cloos on 19 Feb 2010 16:50 >>>>> "Mike" == Mike Fedyk <mfedyk(a)mikefedyk.com> writes: Mike> On Sat, Feb 13, 2010 at 7:11 PM, James Cloos <cloos(a)jhcloos.com> wrote: >> Sometime between rc6 and rc7 all filesystem I/O started using 100% CPU, >> usually on the order of 60% sys, 40% user. >> >> I've tried this with each of ext4, jfs and btrfs filesystems. �All show >> the same issue. >> Mike> Are you sure you're not running with any of the debugging options Mike> enabled? I see the same, but I have debugging enabled (rawhide Mike> kernel). There are some: CONFIG_HAVE_DMA_API_DEBUG=y CONFIG_X86_DEBUGCTLMSR=y CONFIG_CFG80211_DEBUGFS=y CONFIG_MAC80211_DEBUGFS=y CONFIG_PNP_DEBUG_MESSAGES=y CONFIG_FIREWIRE_OHCI_DEBUG=y CONFIG_USB_SERIAL_DEBUG=m CONFIG_DEBUG_FS=y CONFIG_DEBUG_KERNEL=y CONFIG_SCHED_DEBUG=y CONFIG_DEBUG_BUGVERBOSE=y CONFIG_DEBUG_MEMORY_INIT=y CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_KEYS_DEBUG_PROC_KEYS=y I forgot about /proc/sched_debug, but am back at -rc6 right now; I'll post an example of /proc/sched_debug output during the issue when I'm next in rc8 or later. -JimC -- James Cloos <cloos(a)jhcloos.com> OpenPGP: 1024D/ED7DAEA6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Dave Airlie on 19 Feb 2010 17:10
> > OK. �I do use radeon kms (r100). I've just sent a pull req to Linus http://bugzilla.kernel.org/show_bug.cgi?id=15328 this http://bugzilla.kernel.org/attachment.cgi?id=25107 patch. The relevant piece of dmesg is at the top ;-), where it states if you have PAT support or not, but I suspect if you try this patch it'll fix it. Dave. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |