On Thu, Oct 16, 2014 at 11:50:27AM +0200, Mathieu Desnoyers wrote:
> > + if (rw == WRITE) {
> > + if (!buffer_mapped(bh)) {
> > + retval = -EIO;
> > + /* FIXME: fall back to buffered I/O */
>
> Fallback on buffered I/O would void guarantee about having data stored
> into persistent memory after write returns. Not sure we actually want
> that.
Yeah, I think that comment is just stale. I can't see a way in which
buffered I/O would succeed after DAX I/O falis.
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