Re: nmi watchdog failure on dual Athlon box

From: Maciej W. Rozycki
Date: Tue Sep 28 2004 - 16:10:14 EST


On Tue, 28 Sep 2004, Joerg Sommrey wrote:

> |--- lockupcli.c
> |
> |main ()
> |{
> | iopl(3);
> | for (;;) asm("cli");
> |}
>
> Does this mean there is a good reason for further investigations on why
> the IO-APIC NMI watchdog doesn't work? Until now I thought it would
> be ok as long as the local APIC NMI watchdog is set up.

Since this program does busy looping, the local APIC NMI watchdog should
trigger indeed. It's "cli; hlt" that causes a problem with this watchdog.
Something wrong is happening in your system, indeed.

Maciej
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