KTRFAC_TRC_EMUL
p2->p_traceflag |= KTRFAC_TRC_EMUL;
p->p_traceflag |= KTRFAC_TRC_EMUL;
if (p->p_traceflag & KTRFAC_TRC_EMUL) {
p->p_traceflag &= ~KTRFAC_TRC_EMUL;