From: Ross Dickson <ross@datscreative.com.au>
Reply-To: ross@datscreative.com.au
Organization: Dat's Creative Pty Ltd
To: Christian =?iso-8859-1?q?Kr=F6ner?= 
	<christian.kroener@tu-harburg.de>,
       linux-kernel@vger.kernel.org
Subject: Re: IO-APIC on nforce2 [PATCH]
Date: Thu, 15 Apr 2004 10:41:35 +1000
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Cc: Len Brown <len.brown@intel.com>, "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
References: <200404142301.33153.christian.kroener@tu-harburg.de>
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On Thursday 15 April 2004 07:01, Christian Kr?ner wrote:
> > Just would like to add that if we cannot get Maciej's 8259 ack patch
> > back into the distro then we need an if statement in the check_timer()
> > to turn off timer_ack for nforce2 or Christian might get his hi-load back
> > and certainly nmi_debug=1 won't work.
> >
> > e.g. for 2.4.26-rc2 io_apic.c line 1613 or 2.6.5 line 2180
> >       if (pin1 != -1) {
> >               /*
> >                * Ok, does IRQ0 through the IOAPIC work?
> >                */
> > +             if(acpi_skip_timer_override)
> > +                     timer_ack=0;
> >               unmask_IO_APIC_irq(0);
> >
> 
> Also on mainline 2.6.5 this if-statement doesn't seem to be necessary. Len's 
> patch worked on this kernel as well, setting the timer interrupt to 
> IO-APIC-edge and there is no strange hi-load anymore too.
> 

Good that your hi-load is fixed just by routing the timer through io-apic.

Could you try the "nmi_watchdog=1" kernel arg please.

You should get a message in your boot log as to whether it works
also cat /proc/interrupts to see if it stops. 
Wouldn't hurt to try "nmi_watchdog=2" either.
I had a situation where "nmi_watchdog=2" tested ok in boot log
but halted after 23 interrupts.


> thanks, christian.
> 
> 
> 

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