Executive Summary of Linux Kernel 2.6

The Pentium 4 and Xeon CPUs do hyper-threading. Hyper-threading emulates multiple CPUs. The 2.6 kernel fully supports it, and unlike Windows 2000, it knows the difference between fake and real processors. So Windows 2000 wants additional CPU licenses for non-existent processors. I think charging per-CPU licenses is absurd in any case. (And so is charging client-access licenses, and depriving customers of "ownership," while dodging responsibility or liability of any kind...) At any rate, 2.6 takes full advantage of the P4 architecture's hyperthreading capabilities.