linux-kernel - Re: [BUG] kacpi_notify goes into an infinite loop (luckly it calls cond

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Date:	Wed, 30 Jun 2010 12:06:00 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Len Brown <lenb@...nel.org>
Cc:	Zhang Rui <rui.zhang@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Renninger <trenn@...e.de>,
	"clarkt@...p.com" <clarkt@...p.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [BUG] kacpi_notify goes into an infinite loop (luckly it calls
 cond_resched)

On Wed, 2010-06-30 at 11:17 -0400, Len Brown wrote:
> > /sys/firmware/acpi/interrupts/sci_not:       1
> 
> This means that acpi_irq was invoked and could not find a cause for the 
> interrupt.
> 
> Does /proc/interrupts show that the acpi interrupt shares and IRQ
> with another device, or is it alone?
> 

It looks to be alone:

# cat /proc/interrupts 
            CPU0       
   0:        158   IO-APIC-edge      timer
   1:        334   IO-APIC-edge      i8042
   4:          4   IO-APIC-edge    
   6:          5   IO-APIC-edge      floppy
   7:          0   IO-APIC-edge      parport0
   8:          0   IO-APIC-edge      rtc0
   9:          0   IO-APIC-fasteoi   acpi
  12:     238565   IO-APIC-edge      i8042
  14:     158753   IO-APIC-edge      ata_piix
  15:     604816   IO-APIC-edge      ata_piix
  16:      38352   IO-APIC-fasteoi   uhci_hcd:usb2, i915@pci:0000:00:02.0
  17:       3164   IO-APIC-fasteoi   Intel 82801DB-ICH4, eth0
  18:          0   IO-APIC-fasteoi   uhci_hcd:usb4
  19:    1652995   IO-APIC-fasteoi   uhci_hcd:usb3
  23:    3718117   IO-APIC-fasteoi   ehci_hcd:usb1
 NMI:      16288   Non-maskable interrupts
 LOC:    7599309   Local timer interrupts
 SPU:          0   Spurious interrupts
 PMI:          0   Performance monitoring interrupts
 PND:          0   Performance pending work
 RES:          0   Rescheduling interrupts
 CAL:          0   Function call interrupts
 TLB:          0   TLB shootdowns
 TRM:          0   Thermal event interrupts
 THR:          0   Threshold APIC interrupts
 MCE:          0   Machine check exceptions
 MCP:        523   Machine check polls
 ERR:          6
 MIS:          0

-- Steve


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