Re: Strange problem with e1000 driver - ping packet loss

[Len Brown <lenb@kernel.org>]

On Wed, 25 Jun 2008, Len Brown wrote:

> > Linux version 2.6.18-53.el5
 
can you find out if the latest upstream kernel still has this problem?

> > ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 19 (level, low) -> IRQ 177
> > PCI: Setting latency timer of device 0000:00:1d.1 to 64
> > uhci_hcd 0000:00:1d.1: UHCI Host Controller
> > uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
> > uhci_hcd 0000:00:1d.1: irq 177, io base 0x0000e880
> 
> > SELinux: initialized (dev sysfs, type sysfs), uses genfs_contexts
> > audit(1213972202.305:3): policy loaded auid=4294967295
> > Intel(R) PRO/1000 Network Driver - version 7.3.20-k2-NAPI
> > Copyright (c) 1999-2006 Intel Corporation.
> > ACPI: PCI Interrupt 0000:02:02.0[B] -> GSI 18 (level, low) -> IRQ 193
> > e1000: 0000:02:02.0: e1000_probe: (PCI-X:66MHz:64-bit) 00:04:23:00:90:ab
> > e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
> > ACPI: PCI Interrupt 0000:02:02.1[B] -> GSI 18 (level, low) -> IRQ 193
> > e1000: 0000:02:02.1: e1000_probe: (PCI-X:66MHz:64-bit) 00:04:23:00:90:aa
> > e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network Connection

your /proc/interrutps showed just eth1, and it was on IRQ 177 --
was that from a different boot than this dmesg?

in any case, when you boot these on a new kernel
they should both show up on IRQ 18 (because they're on GSI 18).

Also, these IOAPIC interrupts are not programmable -- they
are hard-coded, so the issue is not in the ACPI PCI interrupt
link programming code.

-Len