Symbol: KTRFAC_DROP
sys/kern/kern_ktrace.c
327
if (p->p_traceflag & KTRFAC_DROP) {
sys/kern/kern_ktrace.c
329
p->p_traceflag &= ~KTRFAC_DROP;
sys/kern/kern_ktrace.c
343
p->p_traceflag |= KTRFAC_DROP;