Re: Race betwen the NMI handler and the RTC clock in practially allkernels
From: linux-os
Date: Mon Oct 25 2004 - 15:33:34 EST
On Mon, 25 Oct 2004, Corey Minyard wrote:
According to the comments in 2.4, this code causes the NMI to be re-asserted
if another NMI occurred while the NMI handler was running. I have no idea
how twiddling with these CMOS registers causes this to happen, but that is
supposed to be the intent. I don't think it has anything to do with delays.
I would like to know what this code really does before removing it.
-Corey
Andi Kleen wrote:
NMI is supposed to be turned OFF if the high-bit in the index
register is set. It is turned back ON if it is reset.
Cheers,
Dick Johnson
Penguin : Linux version 2.6.9 on an i686 machine (5537.79 GrumpyMips).
98.36% of all statistics are fiction.
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