Re: [2.6.7] Ehci controller interrupts like crazy on nforce2

Len Brown
2004-07-11T02:41:01Z

On Thu, 2004-07-08 at 21:16, Jonathan Filiatrault wrote:
> Here it is: another nforce2 hardware bug. The ehci controller seems to
> send a massive number of interrupts to the kernel (264379 per second).
> This uses about 5 to 10% of the cpu. This shows up in top in the
> "hi"(hard interrupts) indicator. Nothing unusual shows up in the
> kernel
> log. My system has an Asus A7N8X Nforce2 Board with an Athlon XP 2800+
> mounted on it.
>
> [joe@omega3:~]$ cat /proc/interrupts ; sleep 1; cat /proc/interrupts
> CPU0
> 0: 583513 XT-PIC timer

Please boot with "acpi_skip_timer_override" to fix your IRQ0.
Yes, this workaround should be invoked automatically for you.
No, it probably will not help your EHCI problem.

-Len

> 1: 1279 IO-APIC-edge i8042
> 7: 137293 IO-APIC-edge parport0
> 8: 0 IO-APIC-edge rtc
> 9: 0 IO-APIC-level acpi
> 14: 41463 IO-APIC-edge ide0
> 15: 23 IO-APIC-edge ide1
> 17: 9 IO-APIC-level EMU10K1
> 18: 18584 IO-APIC-level eth0
> 20: 121541873 IO-APIC-level ehci_hcd
> 21: 0 IO-APIC-level ohci_hcd
> 22: 0 IO-APIC-level ohci_hcd
> NMI: 0
> LOC: 583348
> ERR: 0
> MIS: 0
> CPU0