Re: Catching NForce2 lockup with NMI watchdog

[Maciej W. Rozycki]

On Tue, 16 Dec 2003, George Anzinger wrote:

> This is for the VST code where we want to stop the timer interrupts for a bit IF 
> and only if we are in the idle task AND there are no timers to service, i.e. the 
> interrupt would be useless.  We don't want to mess with the PIT program as that 
> would mess up the time when we turn it on again.  So we just want to stop a few 
> interrupts from time to time.  We catch up after turning the PIT back on by 
> using the TSC or pm_timer or some other source that keeps something close to 
> reasonable time.

 I see.  Well, then disable_irq(0) may be the easiest way to do that for
the regular timer interrupt.  For the NMI watchdog from the I/O APIC you'd
use disable_8259A_irq(0) and for one from the local APIC -- just mask the
APIC_LVTPC interrupt (there's no wrapper function, but that's easy).

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@xxxxxxxxxxxxx, PGP key available        +
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