Re: Why do so many machines need "noapic"?

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On Sat, 15 Sep 2007 12:58:27 +0200 Ingo Oeser <[email protected]> wrote:

> On Saturday 15 September 2007, Andrew Morton wrote:
> > There are 48 bugs in bugzilla which mention "noapic"
> > 
> >
> > 
> > And there are 173,000 on the internet ;)
> >
> > 
> > We screwed this pooch a long time ago - years.  Perhaps if some of the many
> > noapic users could run a bisection search to work out when it broke we
> > could start fixing things.  But they all have a workaround so there's no
> > motivation.
> I have 2 SMP-Boards and both need noapic. One is from 2001 (AUSUS CUR-DLS),
> one is from June 2006 (Gigabyte M57SLI-S4).
> There are many reasons:
> 1. Bugs which have such a simple workaround don't get much attention.
> 2. Usually SMP boards are used for machines, which just HAVE to work,
>    since they have been expensive. These are not consumer boards.
> 3. I usually had only USB problems (no IRQ), if ommiting noapic.
>    USB technology is a cosumer grade technology and enterprise
>    grade developers don't have much interest in it (until now?).
> 4. IRQ routing setup is often a BIOS issue. You might be able
>    to fix that by upgrading your BIOS. That often needs a Windows
>    tool. Linux people not always (want to) have access to Windows :-)
> I reported the all the problems (starting 2001), no developer 
> seemed interested.
> I can report them against the latest RC6 kernel tomorrow and put them
> into bugzilla, if we now REALLY care.

I believe that about two years ago we broke something which caused quite a
large number of people to need noapic.  Is that the case with any of your
machines?  Do you know if they run 2.6.ancient without noapic?


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