There was some work done on a RWF_UNCACHED flag a while back, but I'm not sure if it went anywhere. It was supposed to use the page cache if the page is already

There was some work done on a RWF_UNCACHED flag a while back, but I'm not sure if it went anywhere. It was supposed to use the page cache if the page is already there, but not add it (or at least not keep it around) if it isn't.