HAMMER_RESF_ONDELAY
KKASSERT((resv->flags & HAMMER_RESF_ONDELAY) == 0);
if (resv->flags & HAMMER_RESF_ONDELAY) {
resv->flags |= HAMMER_RESF_ONDELAY;
KKASSERT(resv->flags & HAMMER_RESF_ONDELAY);
resv->flags &= ~HAMMER_RESF_ONDELAY;