Oddly, CPU usage seems exceedingly high when using the trackpoint, in the rmi4 irq handler. Running perf-top indicates a hotspot in i801_access calling "in (%dx),%al", which makes sense. I wonder: is this a culprit of expensive accesses in general, which Sultan (CC'd) has been working on? Or are we hitting something different here? Improper IRQ masking in the i801 code? Jason
