Re: Strange lockup of the timer with 2.4.0-test10 SMP (and older)

From: Maciej W. Rozycki (macro@ds2.pg.gda.pl)
Date: Tue Nov 21 2000 - 09:31:36 EST

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On Mon, 20 Nov 2000, Alan Cox wrote:

> > a lock of the PCI bus (as SCSI and NIC are still working). Only the
> > timer interrupts and NMI seem to be stuck : can a driver cause
> > something so "lowlevel" ?
>
> Something stopping the timers on the APIC I guess. But quite what or how I
> don't know

I guess not -- the timer interrupt and the NMI use different I/O APIC
inputs. If both are stuck, it's probably 8254 that gets reprogrammed. I
suppose XFree86 might be at fault -- does it happen with the NMI watchdog
disabled, either?

-- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +

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