OBUFSIZ
static char outbuf[OBUFSIZ];
if (obufcnt >= OBUFSIZ)
if (tp->t_outq.c_cc > hiwat + OBUFSIZ + 100) {
char obuf[OBUFSIZ];
cc = szmin(uio->uio_resid, OBUFSIZ);
x += OBUFSIZ + 100;