On Mon, 2004-10-11 at 16:59, Mark Knecht wrote: > I was building a new kernel under FC2 this morning trying to make FC2 > equal to my Gentoo kernel which is working very well. I made a mistake > on this new kernel and forgot to turn on 'APIC contoller for UMP > machines'. When the kernel booted I got all sorts of xruns. The IRQ > was threaded, so I set it for non-threaded but still got a lot of > xruns. (>100 in 10 minutes) > > I rebuilt the kernel where the only change I made was to enable APIC > interrupts and IO-APIC controllers for UMP. The kernel booted and has > been running for 30 minutes with no xruns... > > Just another IRQ datapoint, but that was the only change I made... > That is really weird, most people report better results _disabling_ APIC on UP. Lee
