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SubjectRe: via rhine network failure on 2.6.0-test4
Looks like IRQ misassignment. Disabling ACPI on test4 got networking to 
work again and the IRQ assignment is back to IRQ11 for via rhine. The
assigned interrupt in the failing case (linux-2.6.0-test4) was IRQ5
instead of 11 which presumably it should be - see contents of
/proc/interrupts in the failing case (test4):

CPU0
0: 1013475 XT-PIC timer
1: 1309 XT-PIC i8042
2: 0 XT-PIC cascade
5: 0 XT-PIC eth0
9: 0 XT-PIC acpi
10: 0 XT-PIC uhci-hcd, uhci-hcd
12: 30047 XT-PIC i8042
14: 15193 XT-PIC ide0
15: 24 XT-PIC ide1
NMI: 0
ERR: 13

The excerpt from the good boot.msg (linux-2.6.0-test3) follows:

<6>ACPI: Subsystem revision 20030714
<4> tbxface-0117 [03] acpi_load_tables : ACPI Tables successfully acquired
<4>Parsing all Control
Methods:..................................................................................
<4>Table [DSDT](id F004) - 326 Objects with 29 Devices 82 Methods 21 Regions
<4>ACPI Namespace successfully loaded at root c054f95c
<4>evxfevnt-0093 [04] acpi_enable : Transition to ACPI mode successful
<4>evgpeblk-0748 [06] ev_create_gpe_block : GPE 00 to 15 [_GPE] 2 regs
at 0000000000004020 on int 9
<4>Completing Region/Field/Buffer/Package
initialization:..............................................
<4>Initialized 21/21 Regions 0/0 Fields 15/15 Buffers 10/10 Packages
(334 nodes)
<4>Executing all Device _STA and_INI methods:..............................
<4>30 Devices found containing: 30 _STA, 1 _INI methods
<6>ACPI: Interpreter enabled
<6>ACPI: Using PIC for interrupt routing
<6>ACPI: PCI Root Bridge [PCI0] (00:00)
<4>PCI: Probing PCI hardware (bus 00)
<7>ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
<4>ACPI: PCI Interrupt Link [LNKA] (IRQs 1 3 4 5 6 7 10 *11 12 14 15)
<4>ACPI: PCI Interrupt Link [LNKB] (IRQs 1 3 4 5 6 7 10 11 12 14 15,
disabled)
<4>ACPI: PCI Interrupt Link [LNKC] (IRQs 1 3 4 5 6 7 10 11 12 14 15,
disabled)
<4>ACPI: PCI Interrupt Link [LNKD] (IRQs 1 3 4 5 6 7 *10 11 12 14 15)
<6>Linux Plug and Play Support v0.97 (c) Adam Belay
<5>SCSI subsystem initialized
<6>Linux Kernel Card Services 3.1.22
<6> options: [pci] [pm]
<6>drivers/usb/core/usb.c: registered new driver usbfs
<6>drivers/usb/core/usb.c: registered new driver hub
<4>ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 5
<4>ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
<6>PCI: Using ACPI for IRQ routing


The corresponding excerpt from the failing (linux-2.6.0-test4) boot.msg

<6>ACPI: Subsystem revision 20030813
<6>ACPI: Interpreter enabled
<6>ACPI: Using PIC for interrupt routing
<6>ACPI: PCI Root Bridge [PCI0] (00:00)
<4>PCI: Probing PCI hardware (bus 00)
<7>PM: Adding info for No Bus:pci0000:00
<7>PM: Adding info for pci:0000:00:00.0
<7>PM: Adding info for pci:0000:00:01.0
<7>PM: Adding info for pci:0000:00:0e.0
<7>PM: Adding info for pci:0000:00:11.0
<7>PM: Adding info for pci:0000:00:11.1
<7>PM: Adding info for pci:0000:00:11.2
<7>PM: Adding info for pci:0000:00:11.3
<7>PM: Adding info for pci:0000:00:12.0
<7>PM: Adding info for pci:0000:01:00.0
<7>ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
<4>ACPI: PCI Interrupt Link [LNKA] (IRQs 1 3 4 5 6 7 10 *11 12 14 15)
<4>ACPI: PCI Interrupt Link [LNKB] (IRQs 1 3 4 5 6 7 10 11 12 14 15,
disabled)
<4>ACPI: PCI Interrupt Link [LNKC] (IRQs 1 3 4 5 6 7 10 11 12 14 15,
disabled)
<4>ACPI: PCI Interrupt Link [LNKD] (IRQs 1 3 4 5 6 7 *10 11 12 14 15)
<6>Linux Plug and Play Support v0.97 (c) Adam Belay
<5>SCSI subsystem initialized
<6>drivers/usb/core/usb.c: registered new driver usbfs
<6>drivers/usb/core/usb.c: registered new driver hub
<4>ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 5
<4>ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 10
<6>PCI: Using ACPI for IRQ routing




Jeff Garzik wrote:

> Steve French wrote:
>
>> The via rhine driver fails to get a dhcp address on my test system on
>> 2.6.0-test4. ethereal shows no dhcp request leaving the box but
>> ifconfig does show the device and it is detected in /proc/pci.
>> Switching from the test3 vs. test4 snapshots built with equivalent
>> configure options on the same system (SuSE 8.2) - test3 works but
>> test4 does not. This is using essentially the default config for both
>> the test3 and test4 cases - the only changes are SMP disabled, scsi
>> devices disabled, Athlon, via-rhine enabled in network devices and a
>> handful of additional filesystems enabled, debug memory allocations
>> enabled. This is the first time in many months that I have seen
>> problems with the via-rhine driver on 2.6
>>
>> Analyzing the code differences between 2.6.0-test3 and test4 (in
>> via-rhine.c) is not very promising since the only line that has
>> changed (kfree to free_netdev) is in the routine via_rhine_remove_one
>> that seems unlikely to cause problems sending data on the network.
>>
>> Ideas as to what could have caused the regression?
>
>
>
> Does /proc/interrupts show any interrupts being received on your eth
> device? Does dmesg report any irq assignment problems, or similar?
>
> This sounds like ACPI or irq routing related.
>
> Jeff
>
>
>
>


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