Re: Intel Pentium Bug: BSDI Releases a patch
Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 12 Nov 1997 15:45:25 +0000 (GMT)
> fault: divide by zero, debugging traps, NMI, into, bound and illegal
> instruction, all others starting at interrupt 7 which is the quite critical
> (FPU context switches) should not experience any performance degradation.
Yep
> OTOH it makes virtually impossible to use NMI for any interprocessor
> interrupts on SMP machines (at least if I understand correctly APIC's doc,
> what a mess).
Linux doesnt use NMI between CPU's - we use IRQ 13 and 16 in 2.0.x