i rerolled the atom cd today with some noticable changes for mp systems. 1. apic handling has changed. the mp code can now handle apic ids > 7. this can affect machines with fewer than 8 cores, especially intel 2xxx-series and xeon 56xx-series processors.
2. the apic code has a hack to find intel ht processors, even when there is no mp table entry. (as per usual.) you might see twice as many cores. 3. msi interrupts are now the default. see apic(3). http://www.quanstro.net/magic/man2html/3/apic this has been tested on a variety of phenom ii, opteron c32, intel 5[56]xx. intel core i7, intel atom, and pentium iv systems from 2-24 cores. but i'd be interested in hearing of any success/failure. - erik
