PSIZE
if (size < PSIZE / 2) { /* Pointers must fit into 2 * size. */
if ((list2 = malloc(nmemb * size + PSIZE)) == NULL)
(rounddown2((u_char *)p + PSIZE - 1 - (u_char *)0, PSIZE)))
bufreq.rx.psize = PSIZE;
while ((len = read(d, buf + tlen, PSIZE
if ((RBUFSIZE - tlen) < PSIZE)
bufreq.tx.psize = PSIZE;
#define RBUFSIZE (PSIZE * NPACKET_R)