Re: [Devil-linux-develop] Serious problem with new kernel?

[Bruce S. <bw...@ar...>]

> >With that said, I still recommend we turn off IOAPIC in the UP kernel to
> >avoid problems that some people are going to have.  People who really
> >want/need IOAPIC can run a SMP kernel.  At least, I don't know of any
> >harm running a SMP kernel on a UP system...
> 
> I think it's a good idea.
> Let's switch off APIC for the UP configuration. (can you do it?)

Sure, I'll do it.  All of them, or just IOAPIC that's causing this
problem (2nd line below)?  Right now we have:

CONFIG_X86_UP_APIC=y
CONFIG_X86_UP_IOAPIC=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y

I can't find the last two variables in the linux-2.4.21/.config file, 
so I'm not sure they exist any longer.  Maybe they were replaced by
the first two?

> UP is mostly for older computes which have problems with SMP Kernels and
> most likey also with APIC.
> Leave it on for SMP.

Sure, but I don't think it matters.  I don't think we have a choice for
SMP.  I'm not an APIC expert, but I think APIC is required for SMP.

 - BS