linux-kernel - Re: 2.6.19-rc6: irq 48: nobody cared

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Date:	Thu, 16 Nov 2006 11:43:56 -0800
From:	"Jesse Brandeburg" <jesse.brandeburg@...il.com>
To:	"Krzysztof Sierota" <Krzysztof.Sierota@...ma.o2.pl>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: 2.6.19-rc6: irq 48: nobody cared

On 11/16/06, Krzysztof Sierota <Krzysztof.Sierota@...ma.o2.pl> wrote:
> Hi,
>
> I'm getting the following in dmesg with 2.6.19-rc5 and 2.6.19-rc6 kernels quad
> opteron server running 64bit kernel, and the network card gets disabled.
>
> On identical server running 32bit kernel, same cards, same slots, same
> configuration running rc5 I see no errors.
>
> irq 48: nobody cared (try booting with the "irqpoll" option)

its an e1000 adapter on irq 48

>  41:        579          0          0          0   IO-APIC-fasteoi   eth2
>  42:       1482          0          0          0   IO-APIC-fasteoi   eth3
>  47:      36323          0          0          0   IO-APIC-fasteoi   eth4
>  48:      99905         10         83          2   IO-APIC-fasteoi   eth5

got quite a few interrupts considering there are no link events in
your logs for eth4 or eth5

> ACPI: IOAPIC (id[0x04] address[0xfec00000] gsi_base[0])
> IOAPIC[0]: apic_id 4, address 0xfec00000, GSI 0-23
> ACPI: IOAPIC (id[0x09] address[0xfeafe000] gsi_base[40])
> IOAPIC[1]: apic_id 9, address 0xfeafe000, GSI 40-46
> ACPI: IOAPIC (id[0x0a] address[0xfeaff000] gsi_base[47])
> IOAPIC[2]: apic_id 10, address 0xfeaff000, GSI 47-53

um, GSI 48 is the only interrupt using IOAPIC[2], could that be related?

> Intel(R) PRO/1000 Network Driver - version 7.2.9-k4-NAPI
> Copyright (c) 1999-2006 Intel Corporation.
> ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 19
> ACPI: PCI Interrupt 0000:02:00.0[A] -> Link [LNKD] -> GSI 19 (level, low) ->
> IRQ 19
> PCI: Setting latency timer of device 0000:02:00.0 to 64
> e1000: 0000:02:00.0: e1000_probe: (PCI Express:2.5Gb/s:32-bit)
> 00:15:17:0b:82:13
> e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
> ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 18
> ACPI: PCI Interrupt 0000:01:00.0[A] -> Link [LNKC] -> GSI 18 (level, low) ->
> IRQ 18
> PCI: Setting latency timer of device 0000:01:00.0 to 64
> e1000: 0000:01:00.0: e1000_probe: (PCI Express:2.5Gb/s:32-bit)
> 00:15:17:0b:81:ae
> e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network Connection
> ACPI: PCI Interrupt 0000:06:02.0[A] -> GSI 41 (level, low) -> IRQ 41
> e1000: 0000:06:02.0: e1000_probe: (PCI-X:100MHz:64-bit) 00:04:23:b0:6b:6e
> e1000: eth2: e1000_probe: Intel(R) PRO/1000 Network Connection
> ACPI: PCI Interrupt 0000:06:02.1[B] -> GSI 42 (level, low) -> IRQ 42
> e1000: 0000:06:02.1: e1000_probe: (PCI-X:100MHz:64-bit) 00:04:23:b0:6b:6f
> e1000: eth3: e1000_probe: Intel(R) PRO/1000 Network Connection
> ACPI: PCI Interrupt 0000:05:03.0[A] -> GSI 47 (level, low) -> IRQ 47
> e1000: 0000:05:03.0: e1000_probe: (PCI-X:133MHz:64-bit) 00:30:48:57:3e:a0
> e1000: eth4: e1000_probe: Intel(R) PRO/1000 Network Connection
> ACPI: PCI Interrupt 0000:05:03.1[B] -> GSI 48 (level, low) -> IRQ 48
> e1000: 0000:05:03.1: e1000_probe: (PCI-X:133MHz:64-bit) 00:30:48:57:3e:a1
> e1000: eth5: e1000_probe: Intel(R) PRO/1000 Network Connection

how come you aren't bringing the interfaces up?  At least I don't see
any link messages. We request the IRQ only at open.  Something else is
causing interrupts on the e1000 devices' lines.

I suspect the IOAPIC code or ACPI code.

Jesse
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