> > 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
