On Mon, Sep 18, 2017 at 09:45:57AM -0600, Michael Moy wrote:

The write hint needs to be copied to the mapped filesystem
so it can be passed down to the nvme device driver.

v2: fix tabs in the email

If you want the write hint for buffered I/O you need to set it on the
inode using F_SET_RW_HINT.

With your patch we'd magically move the file hint to the inode hint
on each write.