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contributed to the transferable load count. This prevents any potential problems with sched_pin() being used around calls to setrunqueue(). - Change the sched_add() load balancing algorithm to try to migrate on wakeup. This attempts to place threads that communicate with each other on the same CPU. - Don't clear the idle counts in kseq_transfer(), let the cpus do that when they call sched_add() from kseq_assign(). - Correct a few out of date comments. - Make sure the ke_cpu field is correct when we preempt. - Call kseq_assign() from sched_clock() to catch any assignments that were done without IPI. Presently all assignments are done with an IPI, but I'm trying a patch that limits that. - Don't migrate a thread if it is still runnable in sched_add(). Previously, this could only happen for KSE threads, but due to changes to sched_switch() all threads went through this path. - Remove some code that was added with preemption but is not necessary.
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