Maxim, On Fri, 2007-03-16 at 12:30 +0200, Maxim Levitsky wrote: > 3) Sometimes I get this (once in three boots or so) > > [ 36.217405] ENABLING IO-APIC IRQs > [ 36.217587] ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1 > [ 36.433917] APIC timer disabled due to verification failure. > > And NO_HZ is disabled due to that (I get 1000/s timer's interrupts) > I haven't investigated that yet. > It looks like another new test that my hardware fails to perform...
Yes, this is probably caused by SMM code trying to emulate a PS/2 keyboard from a (maybe connected or not) USB keyboard. Unfortunately we have no way to disable this BIOS misfeature in the early boot process. Arjan, Len ????? I built in this test to rule out bogus LAPIC timer calibration values which are sometimes off by factor 2-10. But I also built in a calibration against the PM-Timer, which turned out to be quite reliable and I think the additional verification step is only necessary for sytems without PM-Timer. That was a bit over cautious from my side. I send a patch to avoid this when PM-Timer is available in a separate mail. tglx - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/