KN_MARKER
if (kn->kn_status & KN_MARKER) {
if ((kn->kn_status & (KN_MARKER | KN_QUEUED)) == 0) {
if ((kn->kn_status & KN_MARKER) == 0) {
marker->kn_status = KN_MARKER;
(kn->kn_status & KN_MARKER) != 0 && kn != marker;
KASSERT((kn->kn_status & KN_MARKER) == 0);
KASSERT((kn->kn_status & KN_MARKER) == 0);
KASSERT((kn->kn_status & KN_MARKER) == 0);