Re: [LSF/MM TOPIC] Future direction of DAX

"Darrick J. Wong" [off-list ref] writes:

quoted

- Whenever you mount a filesystem with DAX, it spits out a message that says
  "DAX enabled. Warning: EXPERIMENTAL, use at your own risk".  What criteria
  needs to be met for DAX to no longer be considered experimental?

For XFS I'd like to get reflink working with it, for starters.

What do you mean by this, exactly?  When Dave outlined the requirements
for PMEM_IMMUTABLE, it was very clear that metadata updates would not be
possible.  And would you really cosider this a barrier to marking dax
fully supported?  I wouldn't.

We probably need a bunch more verification work to show that file IO
doesn't adopt any bad quirks having turned on the per-inode DAX flag.

Can you be more specific?  We have ltp and xfstests.  If you have some
mkfs/mount options that you think should be tested, speak up.  Beyond
that, if it passes ./check -g auto and ltp, are we good?

-Jeff