VRSF_RENEW
ring->vr_state_flags |= VRSF_RENEW;
ring->vr_state_flags &= ~VRSF_RENEW;
(ring->vr_state_flags & VRSF_RENEW) != 0) {
ring->vr_state_flags |= VRSF_RENEW;
ring->vr_state_flags &= ~VRSF_RENEW;