[lug] noapic option

[D. Stimits]

The apic is irrelevant to uniprocessor, it automatically does not use
it. Though I doubt it harms anything. Whatever problems are still left,
you can be fairly sure it is not an apic problem if the UP kernel still
has problems. In the case of SMP with noapic, I have a feeling that some
characteristics of spinlocks, used in the kernel, and possibly used in
some programs, might misbehave...although rarely.

Rodger Wilson {I/O Software} wrote:
> 
> I ran linux-UP with the noapic option and still have a problem with it
> when I put the drives under any kind of a load.
> 
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> -- last message --
> 
> >Date: Tue, 31 Oct 2000 17:57:39 -0700
> >From: Ian S. Nelson <nelson_ at attglobal.net>
> >Reply-To: lug at lug.boulder.co.us
> >To: lug at lug.boulder.co.us
> >Subject: Re: [lug] noapic option
> >
> >Rodger Wilson {I/O Software} wrote:
> >
> >> I have been having a hell of a time latly getting a few of my scsi
> >> cards working with linux.  I finally figured out that I need to boot
> >> linux with the noapic option.
> >>
> >> This seems to make linux so that it will boot, but not stable!
> >
> >Doesn't the APIC route the interrupts to the correct processor in an
> >SMP system?   Turning off the APIC, whatever that may mean, may have
> >fundamental problems with SMP.
> >
> >
> >> I am guessing that this does something with the Priority Interupt
> >> Controler.  Does anyone know what the real issue that the noapic
> >> options really deals with, and/or other ways to really fix the
> >> problemr?
> >
> >Does it crash  in uniprocessor mode?
> >
> >Which kernel is this running?
> >
> >
> >--
> >Ian S. Nelson                                           __o
> >Nelson_ at attglobal.net.NOSPAM                            \<,
> >                                                      ()/ ()
> >
> >
> >
> >
> >
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> 
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