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	cem
	Jun 13 2020, 12:32 AM

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	diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
	index 22eacf423b95..fe90a153fb94 100644
	--- a/sys/vm/vm_page.c
	+++ b/sys/vm/vm_page.c
	@@ -3836,13 +3836,15 @@ vm_page_wire(vm_page_t m)
	{
	u_int old;

	- KASSERT(m->object != NULL,
	- ("vm_page_wire: page %p does not belong to an object", m));
	- if (!vm_page_busied(m) && !vm_object_busied(m->object))
	- VM_OBJECT_ASSERT_LOCKED(m->object);
	- KASSERT((m->flags & PG_FICTITIOUS) == 0 \|\|
	- VPRC_WIRE_COUNT(m->ref_count) >= 1,
	- ("vm_page_wire: fictitious page %p has zero wirings", m));
	+#ifdef INVARIANTS
	+ if (m->object != NULL) {
	+ if (!vm_page_busied(m) && !vm_object_busied(m->object))
	+ VM_OBJECT_ASSERT_LOCKED(m->object);
	+ } else
	+ KASSERT((m->flags & PG_FICTITIOUS) == 0 \|\|
	+ VPRC_WIRE_COUNT(m->ref_count) >= 1,
	+ ("vm_page_wire: fictitious page %p has zero wirings", m));
	+#endif

	old = atomic_fetchadd_int(&m->ref_count, 1);
	KASSERT(VPRC_WIRE_COUNT(old) != VPRC_WIRE_COUNT_MAX,