D3193.diff
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	Index: head/sys/kern/sched_4bsd.c
	===================================================================
	--- head/sys/kern/sched_4bsd.c
	+++ head/sys/kern/sched_4bsd.c
	@@ -792,6 +792,8 @@
	{
	struct td_sched *ts;

	+ childtd->td_oncpu = NOCPU;
	+ childtd->td_lastcpu = NOCPU;
	childtd->td_estcpu = td->td_estcpu;
	childtd->td_lock = &sched_lock;
	childtd->td_cpuset = cpuset_ref(td->td_cpuset);
	@@ -1671,6 +1673,8 @@
	} else {
	lock_profile_release_lock(&sched_lock.lock_object);
	MPASS(td->td_lock == &sched_lock);
	+ td->td_lastcpu = td->td_oncpu;
	+ td->td_oncpu = NOCPU;
	}
	mtx_assert(&sched_lock, MA_OWNED);
	KASSERT(curthread->td_md.md_spinlock_count == 1, ("invalid count"));
	Index: head/sys/kern/sched_ule.c
	===================================================================
	--- head/sys/kern/sched_ule.c
	+++ head/sys/kern/sched_ule.c
	@@ -2080,6 +2080,8 @@
	*/
	ts = td->td_sched;
	ts2 = child->td_sched;
	+ child->td_oncpu = NOCPU;
	+ child->td_lastcpu = NOCPU;
	child->td_lock = TDQ_LOCKPTR(tdq);
	child->td_cpuset = cpuset_ref(td->td_cpuset);
	ts2->ts_cpu = ts->ts_cpu;
	@@ -2703,6 +2705,8 @@
	MPASS(td->td_lock == TDQ_LOCKPTR(tdq));
	tdq_load_rem(tdq, td);
	lock_profile_release_lock(&TDQ_LOCKPTR(tdq)->lock_object);
	+ td->td_lastcpu = td->td_oncpu;
	+ td->td_oncpu = NOCPU;
	}
	KASSERT(curthread->td_md.md_spinlock_count == 1, ("invalid count"));
	newtd = choosethread();