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SubjectRe: [PATCH] NMI request/release, version 5 - I think this one's ready
John Levon wrote:

>On Thu, Oct 24, 2002 at 10:36:22AM -0500, Corey Minyard wrote:
>>Is there any way to detect if the nmi watchdog actually caused the
>>timeout? I don't understand the hardware well enough to do it without
>You can check if the counter used overflowed :
>#define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
>#define CTRL_READ(l,h,msrs,c) do {rdmsr(MSR_P6_PERFCTR0, (l), (h));} while (0)
> CTR_READ(low, high, msrs, i);
> if (CTR_OVERFLOWED(low)) {
> ... found
Any way to do this for the IO_APIC case?


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