Hi, This is a bug report as requested in linux-2.6.32.2/Documentatoin/PCI/MSI-HOWTO.txt Problem: Ethernet is not reliable: gives timeouts like this (in /var/log/messages): Dec 26 00:37:55 zolder kernel: NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out The ethernet controller is the only device on the motherboard that uses MSI interrupts: $ cat /proc/interrupts ... 26: 89 9245334 PCI-MSI-edge eth0 ... Adding "pci=nomsi" does change this to: ... 16: 88 4114 IO-APIC-fasteoi nouveau, eth0 ... and this solves the problem. Result of "lspci -v": [root@zolder ~]# lspci -v 00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02) Subsystem: ASUSTeK Computer Inc. Device 817a Flags: bus master, fast devsel, latency 0 Capabilities: [e0] Vendor Specific Information <?> 00:01.0 PCI bridge: Intel Corporation 82945G/GZ/P/PL PCI Express Root Port (rev 02) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 I/O behind bridge: 0000e000-0000efff Memory behind bridge: dcf00000-deffffff Prefetchable memory behind bridge: 00000000e0000000-00000000efffffff Capabilities: [88] Subsystem: ASUSTeK Computer Inc. Device 817a Capabilities: [80] Power Management version 2 Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit- Capabilities: [a0] Express Root Port (Slot+), MSI 00 Capabilities: [100] Virtual Channel <?> Capabilities: [140] Root Complex Link <?> Kernel driver in use: pcieport-driver Kernel modules: shpchp 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, fast devsel, latency 0, IRQ 19 Memory at dccf8000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel <?> Capabilities: [130] Root Complex Link <?> Kernel driver in use: HDA Intel Kernel modules: snd-hda-intel 00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 I/O behind bridge: 0000d000-0000dfff Memory behind bridge: dce00000-dcefffff Prefetchable memory behind bridge: 00000000dff00000-00000000dfffffff Capabilities: [40] Express Root Port (Slot-), MSI 00 Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device 8179 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel <?> Capabilities: [180] Root Complex Link <?> Kernel driver in use: pcieport-driver Kernel modules: shpchp 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01) (prog-if 00 [UHCI]) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, medium devsel, latency 0, IRQ 20 I/O ports at 9000 [size=32] Kernel driver in use: uhci_hcd 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01) (prog-if 00 [UHCI]) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, medium devsel, latency 0, IRQ 17 I/O ports at 9400 [size=32] Kernel driver in use: uhci_hcd 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01) (prog-if 00 [UHCI]) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, medium devsel, latency 0, IRQ 18 I/O ports at 9800 [size=32] Kernel driver in use: uhci_hcd 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01) (prog-if 00 [UHCI]) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, medium devsel, latency 0, IRQ 19 I/O ports at a000 [size=32] Kernel driver in use: uhci_hcd 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01) (prog-if 20 [EHCI]) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, medium devsel, latency 0, IRQ 20 Memory at dccff800 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Kernel driver in use: ehci_hcd 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) (prog-if 01 [Subtractive decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=01, subordinate=01, sec-latency=32 I/O behind bridge: 0000c000-0000cfff Memory behind bridge: dcd00000-dcdfffff Prefetchable memory behind bridge: 00000000dfe00000-00000000dfefffff Capabilities: [50] Subsystem: ASUSTeK Computer Inc. Device 8179 00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, medium devsel, latency 0 Capabilities: [e0] Vendor Specific Information <?> Kernel modules: iTCO_wdt, intel-rng 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01) (prog-if 8a [Master SecP PriP]) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, medium devsel, latency 0, IRQ 22 I/O ports at 01f0 [size=8] I/O ports at 03f4 [size=1] I/O ports at 0170 [size=8] I/O ports at 0374 [size=1] I/O ports at ffa0 [size=16] Kernel driver in use: ata_piix Kernel modules: ata_generic, pata_acpi 00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) SATA IDE Controller (rev 01) (prog-if 8f [Master SecP SecO PriP PriO]) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 23 I/O ports at b800 [size=8] I/O ports at b400 [size=4] I/O ports at b000 [size=8] I/O ports at a800 [size=4] I/O ports at a400 [size=16] Memory at dccffc00 (32-bit, non-prefetchable) [size=1K] Capabilities: [70] Power Management version 2 Kernel driver in use: ata_piix Kernel modules: ata_generic, pata_acpi 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01) Subsystem: ASUSTeK Computer Inc. P5KPL-VM Motherboard Flags: medium devsel, IRQ 23 I/O ports at 0400 [size=32] Kernel driver in use: i801_smbus Kernel modules: i2c-i801 01:01.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01) Subsystem: KNC One Device 0022 Flags: bus master, medium devsel, latency 64, IRQ 17 Memory at dcdff800 (32-bit, non-prefetchable) [size=512] Kernel driver in use: budget_av Kernel modules: budget-av 01:02.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11) Subsystem: Twinhan Technology Co. Ltd VisionPlus DVB card Flags: bus master, medium devsel, latency 64, IRQ 18 Memory at dfefe000 (32-bit, prefetchable) [size=4K] Capabilities: [44] Vital Product Data Capabilities: [4c] Power Management version 2 Kernel driver in use: bttv Kernel modules: bttv 01:02.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11) Subsystem: Twinhan Technology Co. Ltd VisionPlus DVB Card Flags: bus master, medium devsel, latency 64, IRQ 18 Memory at dfeff000 (32-bit, prefetchable) [size=4K] Capabilities: [44] Vital Product Data Capabilities: [4c] Power Management version 2 Kernel driver in use: bt878 Kernel modules: bt878 01:04.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01) Subsystem: KNC One Device 002c Flags: bus master, medium devsel, latency 64, IRQ 21 Memory at dcdffc00 (32-bit, non-prefetchable) [size=512] Kernel driver in use: budget_av Kernel modules: budget-av 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) Subsystem: ASUSTeK Computer Inc. Device 82c6 Flags: bus master, fast devsel, latency 0, IRQ 16 I/O ports at d800 [size=256] Memory at dceff000 (64-bit, non-prefetchable) [size=4K] Memory at dfff0000 (64-bit, prefetchable) [size=64K] Expansion ROM at dcec0000 [disabled] [size=128K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable- Count=2 Masked- Capabilities: [d0] Vital Product Data Capabilities: [100] Advanced Error Reporting Capabilities: [140] Virtual Channel <?> Capabilities: [160] Device Serial Number 00-00-00-00-ec-10-68-81 Kernel driver in use: r8169 Kernel modules: r8169 03:00.0 VGA compatible controller: nVidia Corporation NV44 [GeForce 6200 TurboCache(TM)] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 81ec Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at de000000 (32-bit, non-prefetchable) [size=16M] Memory at e0000000 (64-bit, prefetchable) [size=256M] Memory at dd000000 (64-bit, non-prefetchable) [size=16M] Expansion ROM at dcfe0000 [disabled] [size=128K] Capabilities: [60] Power Management version 2 Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [78] Express Endpoint, MSI 00 Capabilities: [100] Virtual Channel <?> Capabilities: [128] Power Budgeting <?> Kernel driver in use: nouveau Kernel modules: nouveau, nvidiafb ----- [ end of lspci -v output ] ---- Cheers, Klaas. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
