I don't warrant any of this material, as it is free. Thanks go to Intel for the use of some equipment for cursory validation and for a few intense debug sessions. I'm only listing the freely available OSes which support the Intel MP Spec, since there's enough advertisement of the others elsewhere. Linux has an ongoing SMP project called Linux-SMP , headed by Alan Cox.
Several versions are very stable, and can be used for production work.
The status page may go away sometime soon. Peter Wemm and Steve Passe. The SMP kernel is now merged into the mainline 3.0-current source tree. Important fixes have been made lately that make it much more stable. The Intel spec doesn't include many code sequences, and though it includes all of the appropriate information which is not in the APIC documentation but relevant to the MPS architecture, many things are not immediately obvious.