Index: sys/vm/vm_page.c
===================================================================
--- sys/vm/vm_page.c
+++ sys/vm/vm_page.c
@@ -3594,8 +3594,6 @@
 	struct vm_pagequeue *pq;
 	int domain;
 
-	KASSERT((m->oflags & VPO_UNMANAGED) == 0,
-	    ("page %p is unmanaged", m));
 	KASSERT(queue < PQ_COUNT, ("invalid queue %d", queue));
 
 	domain = vm_page_domain(m);