linux-kernel - Re: APIC error 80(80) and 00(80)

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Message-id: <48192A18.2080502@shaw.ca>
Date:	Wed, 30 Apr 2008 20:25:28 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Timur Alperovich <timur.alperovich@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: APIC error 80(80) and 00(80)

Timur Alperovich wrote:
> Hi,
> 
> I apologize if others have asked this question before, but I'm a bit
> confused by the APIC error messages, i.e. I couldn't find what they
> mean. After inserting a kernel module I wrote and trying to read the
> device it created, I see the following in dmesg:
> 
> Losing some ticks... checking if CPU frequency changed.
> warning: many lost ticks.
> Your time source seems to be instable or some driver is hogging interupts
> rip tg3_read32+0x9/0xa [tg3]
> Falling back to HPET
> APIC error on CPU3: 00(80)
> APIC error on CPU3: 80(80)
> 
> where the last message was repeated 1600 times. Could anyone tell me
> what it means or of a better place to ask about it?

Not sure exactly what that means, but sounds like something really wonky 
happened.. I'd suspect your code somehow got stuck in a loop with 
interrupts off on one CPU, or corrupted memory, or something.
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