6598890 cancellation code abuses synonyms

6498304 too much CPU time winding up in LMS_WAIT_CPU

5062435 cpu_X_system kstats should include interrupt time

6217375 CPU unconfigure, t_disp_queue, and restore_mstate() duke it out
6294464 machine hung with threads spining in thread_lock()on a cpu dispatch lock that never gets released.

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