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    SubjectRe: [PATCH v11 07/21] dax,ext2: Replace XIP read and write with DAX I/O
    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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