LRU_VRELE
if (listhd == &lru_list[LRU_VRELE])
for (vip = lru_iter_first(LRU_VRELE, &iter); vip != NULL;
while ((vip = lru_iter_first(LRU_VRELE, &iter)) != NULL) {
KASSERT(vip->vi_lrulisthd == &lru_list[LRU_VRELE]);
lru_requeue(vp, &lru_list[LRU_VRELE]);