nlm_gc_sched_cv
cv_destroy(&g->nlm_gc_sched_cv);
cv_init(&g->nlm_gc_sched_cv, NULL, CV_DEFAULT, NULL);
cv_signal(&g->nlm_gc_sched_cv);
cv_broadcast(&g->nlm_gc_sched_cv);
(void) cv_timedwait(&g->nlm_gc_sched_cv, &g->lock,