AUX_SIZE
rb->aux_size = AUX_SIZE;
aux = mmap(region + REGION_AUX_OFFS, AUX_SIZE, PROT_READ | PROT_WRITE,
munmap(aux, AUX_SIZE);
rb->aux_size = AUX_SIZE;
aux = mmap(region + REGION_AUX_OFFS, AUX_SIZE, PROT_READ | PROT_WRITE,
#define REGION_SIZE (2 * RB_SIZE + 2 * AUX_SIZE)
.ptr_size = AUX_SIZE,