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Subject: Re: [2.6.7] Ehci controller interrupts like crazy on nforce2
From: Len Brown <len.brown@intel.com>
To: Jonathan Filiatrault <lintuxicated@yahoo.ca>
Cc: linux-kernel@vger.kernel.org, linux-usb-devel@lists.sourceforge.net
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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