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Date:	Thu, 5 Apr 2007 08:20:00 +0200
From:	Jarek Poplawski <>
To:	Christian Kujau <>
Cc:,,, Francois Romieu <>
Subject: Re: NETDEV WATCHDOG and lockups

On Wed, Apr 04, 2007 at 02:20:23PM +0100, Christian Kujau wrote:
> On Wed, 4 Apr 2007, Jarek Poplawski wrote:
> >So, it's a lot sooner than before. (BTW, isn't there anything
> >in debug log?)
> No, nothing. I've set up remote-syslgging to the other node (node1 
> logging to node2 and vice versa) - nothing :(
> >I see both CPUs did interrupt handling again.
> Yes, when booting with 'lapic' both CPUs/cores are handling interrupts 
> again. However, since 'lapic' seems to lead to crashes here, we would be 
> more than happy to just boot with 'noapic' but have 'irqbalance' 
> working. Unfortunately, irqbalance is unable to write to 
> /proc/irq/*/smp_affinity (did not help to disable CONFIG_IRQBALANCE).

I hope you are right, but maybe it's not lapic's fault?
Probably the fastest way to know would be to try with
some other card, yet.

> >Maybe it's a real locking problem. Here are some more
> >suggestions for testing (if you don't find anything better):
> >- try without SMP, so: 'acpi=off lapic nosmp'

BTW, I'm not sure acpi should be turned off with any
modern hardware. Did you tried to compile with
CONFIG_ACPI = y, all other acpi options off, and maybe
to tweak only with 'pci=...' boot parameter?

Jarek P.
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