Re: [9fans] Keyboard and Mouse

[erik quanstrom <quanstro@coraid.com>]

> > This problem is well known, and seems to be
> > caused by HyperThreading on some CPU.
> >
> > Try to add the following line to "plan9.ini":
> > *nomp=1
> >
> > It will solve this problem.
>
> hyperthreading?  that doesn't sound right.
>
> do you mean a bad mp interrupt table?

you can avoid ht by setting *ncpu=1 in your
plan9.ini without disabling mp interrupts.
so it should be easy to say definitivly which
one causes the problem.

as a further explainer, 8259 interrupts can't
work in an mp environment.  you need to
use either mp interrupts or msi interrupts.
since plan 9 doesn't implement msi, *nomp=1
implies that only one cpu may be activated.
so a uniprocessor may still use mp interrupts.

- erik