diff --git a/sys/vm/vm_kern.c b/sys/vm/vm_kern.c
--- a/sys/vm/vm_kern.c
+++ b/sys/vm/vm_kern.c
@@ -182,10 +182,6 @@
 
 	VM_OBJECT_ASSERT_WLOCKED(object);
 
-	/* Disallow an invalid combination of flags. */
-	MPASS((pflags & (VM_ALLOC_WAITOK | VM_ALLOC_NORECLAIM)) !=
-	    (VM_ALLOC_WAITOK | VM_ALLOC_NORECLAIM));
-
 	wait = (pflags & VM_ALLOC_WAITOK) != 0;
 	reclaim = (pflags & VM_ALLOC_NORECLAIM) == 0;
 	pflags &= ~(VM_ALLOC_NOWAIT | VM_ALLOC_WAITOK | VM_ALLOC_WAITFAIL);
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -2250,12 +2250,15 @@
 	vm_page_t m, m_ret, mpred;
 	u_int busy_lock, flags, oflags;
 
-#define	VPAC_FLAGS	VPA_FLAGS
+#define	VPAC_FLAGS	(VPA_FLAGS | VM_ALLOC_NORECLAIM)
 	KASSERT((req & ~VPAC_FLAGS) == 0,
 	    ("invalid request %#x", req));
 	KASSERT(((req & (VM_ALLOC_NOBUSY | VM_ALLOC_SBUSY)) !=
 	    (VM_ALLOC_NOBUSY | VM_ALLOC_SBUSY)),
 	    ("invalid request %#x", req));
+	KASSERT((req & (VM_ALLOC_WAITOK | VM_ALLOC_NORECLAIM)) !=
+	    (VM_ALLOC_WAITOK | VM_ALLOC_NORECLAIM),
+	    ("invalid request %#x", req));
 	VM_OBJECT_ASSERT_WLOCKED(object);
 	KASSERT((object->flags & OBJ_FICTITIOUS) == 0,
 	    ("vm_page_alloc_contig: object %p has fictitious pages",
@@ -2294,7 +2297,8 @@
 		if (m_ret == NULL) {
 			vm_domain_freecnt_inc(vmd, npages);
 #if VM_NRESERVLEVEL > 0
-			if (vm_reserv_reclaim_contig(domain, npages, low,
+			if ((req & VM_ALLOC_NORECLAIM) == 0 &&
+			    vm_reserv_reclaim_contig(domain, npages, low,
 			    high, alignment, boundary))
 				goto again;
 #endif
@@ -2525,9 +2529,12 @@
 	vm_page_t m, m_ret;
 	u_int flags;
 
-#define	VPANC_FLAGS	VPAN_FLAGS
+#define	VPANC_FLAGS	(VPAN_FLAGS | VM_ALLOC_NORECLAIM)
 	KASSERT((req & ~VPANC_FLAGS) == 0,
 	    ("invalid request %#x", req));
+	KASSERT((req & (VM_ALLOC_WAITOK | VM_ALLOC_NORECLAIM)) !=
+	    (VM_ALLOC_WAITOK | VM_ALLOC_NORECLAIM),
+	    ("invalid request %#x", req));
 	KASSERT(((req & (VM_ALLOC_NOBUSY | VM_ALLOC_SBUSY)) !=
 	    (VM_ALLOC_NOBUSY | VM_ALLOC_SBUSY)),
 	    ("invalid request %#x", req));
@@ -2547,7 +2554,8 @@
 		if (m_ret == NULL) {
 			vm_domain_freecnt_inc(vmd, npages);
 #if VM_NRESERVLEVEL > 0
-			if (vm_reserv_reclaim_contig(domain, npages, low,
+			if ((req & VM_ALLOC_NORECLAIM) == 0 &&
+			    vm_reserv_reclaim_contig(domain, npages, low,
 			    high, alignment, boundary))
 				goto again;
 #endif