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Re: What's an IRQ storm?

 

On 15/11/12 16:06, Colin Ian King wrote:
On 15/11/12 15:53, Brendan Donegan wrote:
On 15/11/12 10:33, Colin Ian King wrote:
On 15/11/12 10:26, Brendan Donegan wrote:
Hi,

I've come across this critical FWTS failure on one system which
otherwise looks fine for certification:

FAILED [CRITICAL] KlogDisablingIRQ: Test 1, CRITICAL Kernel message: [
12.502739] Disabling IRQ #16
ADVICE: The kernel detected an irq storm. This is most probably an IRQ
routing bug.

(Full Log)
http://paste.ubuntu.com/1359992/

Shall I raise a kernel bug for this and can anyone shed any light on the
possible effects of this error/what it means?


So, this kernel error comes from kernel/irq/spurious.c,
note_interrupt() which has detected that IRQ 16 has generated > 99900
interrupts but it seems that it's not being responded to so the IRQ
has been disabled.  We should have a bug filed and see why this is
misbehaving.

I'd like to see what /proc/interrupts contains too.
http://paste.ubuntu.com/1360502/

Pastebined just after running fwts and observing the failure. Anything
telling?

Ignore my previous message, this is what happens when you try and answer e-mails with a head full of pain killers.

IRQ 16:

16: 200001 0 0 0 IR-IO-APIC-fasteoi ehci_hcd:usb1

Looks like ehci_hcd (USB1) is being disabled. We should check that out. So file a bug, it needs investigating.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1079269

I'll try and find out to if any of the systems USB devices are disabled.

Colin





Colin




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