Function sched_rem

freebsd/kern/sched_ule.c:2632–2650

* Remove a thread from a run-queue without running it. This is used * when we're stealing a thread from a remote queue. Otherwise all threads * exit by calling sched_exit_thread() and sched_throw() themselves. */

 * exit by calling sched_exit_thread() and sched_throw() themselves.
 */
void
sched_rem(struct thread *td)
{
	struct tdq *tdq;

	KTR_STATE1(KTR_SCHED, "thread", sched_tdname(td), "runq rem",
	    "prio:%d", td->td_priority);
	SDT_PROBE3(sched, , , dequeue, td, td->td_proc, NULL);
	tdq = TDQ_CPU(td_get_sched(td)->ts_cpu);
	TDQ_LOCK_ASSERT(tdq, MA_OWNED);
	MPASS(td->td_lock == TDQ_LOCKPTR(tdq));
	KASSERT(TD_ON_RUNQ(td),
	    ("sched_rem: thread not on run queue"));
	tdq_runq_rem(tdq, td);
	tdq_load_rem(tdq, td);
	TD_SET_CAN_RUN(td);
	if (td->td_priority == tdq->tdq_lowpri)
		tdq_setlowpri(tdq, NULL);
}

/*
 * Fetch cpu utilization information.  Updates on demand.