Alan, Attached are the updates for O(1) resycned to 2.4.19-pre8-ac1. The previous patches still apply cleanly. If you want the chunks, they are at: http://www.kernel.org/pub/linux/kernel/people/rml/sched/for_alan/ Specifically, these patches: - final yield() abstractions (found some more in arch-dependent code) - updated migration_init code, from 2.5, based on Erich Focht's work. Cleaner and simpler and works. wli (author of current implementation) signs off. - separate notion of max RT priority from max RT priority exported to user-space. Enjoy, Robert Love