NREGIONS_SIZE
maxchunks = (ssize_t)(NREGIONS_SIZE - chunk_offset) /
nswath = slab_size / NREGIONS_SIZE;
while (slab_size <= NREGIONS_SIZE) {
if (slab_size >= NREGIONS_SIZE) {
nswath = slab->slab_size / NREGIONS_SIZE;
if (slab_size < NREGIONS_SIZE)
eaddr = baddr + NREGIONS_SIZE;