2007/11/20, Alan Cox <alan@lxorguk.ukuu.org.uk>:
quoted text
> >  kernel: [734344.717844] irq 21: nobody cared (try booting with the
> > "irqpoll" option)
> >  kernel: [734344.717866]
>
> Your machine decided to emit interrupt 21 without an apparent reason.
> Whatever caused that made the kernel shut down IRQ 21 at which point the
> disk drives on that IRQ were no longer being serviced. Everything on IRQ
> 21 would have died - which may be why your networking failed too.
>
> What do you have on IRQ 21 and is this a one off ?

I've had other freezes before but this was the first time I was able
to see what was actually going on.
IRQ 21 appears to be shared between sata_nv and ethernet.

Does this mean my hardware/BIOS is broken somehow?
I'm running the latest BIOS available.

# cat /proc/interrupts            CPU0       CPU1
  0:      26497    3603163   IO-APIC-edge      timer
  1:          0          2   IO-APIC-edge      i8042
  8:          0          0   IO-APIC-edge      rtc
 9:          0          0   IO-APIC-fasteoi   acpi
 12:          0          6   IO-APIC-edge      i8042
 16:       4851     669159   IO-APIC-fasteoi   shpchp, libata
 20:          0          0   IO-APIC-fasteoi   sata_nv
 21:      36443    4775430   IO-APIC-fasteoi   sata_nv, eth0
 22:      31261    4531218   IO-APIC-fasteoi   ohci_hcd:usb1, sata_nv
 23:          4       1649   IO-APIC-fasteoi   HDA Intel, ehci_hcd:usb2
NMI:          0          0
LOC:    3629562    3629543
ERR:          0

  -- noah
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