void OSD::_got_mon_epochs(epoch_t oldest, epoch_t newest)
{
  Mutex::Locker l(osd_lock);
  if (is_preboot()) {
    _preboot(oldest, newest);
  }
}
void OSD::_got_mon_epochs(epoch_t oldest, epoch_t newest)
{
  Mutex::Locker l(osd_lock);
  if (is_preboot()) {
    _preboot(oldest, newest);
  }
}