Re: Catching NForce2 lockup with NMI watchdog

[Maciej W. Rozycki]

On Tue, 16 Dec 2003, Richard B. Johnson wrote:

> Although I haven't looked at recent source-code, with APIC, the
> problem is even simpler. If you booted with APIC, just set
> the global "using_apic_timer" to zero and, voila`, timer-ticks
> stop.

 Except we are writing of the 8254 timer, not the local APIC one...

> ...the machine will lock-up forever because without that timer,
> there will be no preemption. Once a CPU-hog gets the CPU, only
> and interrupt can get it away.

 And the 8254 timer isn't used for preemption when local APICs are used,
so disabling it won't break the whole system, only the timekeeping.

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