For six years now, when mounting xfs, ext4, or ext2 with dax, the drivers have logged "DAX enabled. Warning: EXPERIMENTAL, use at your own risk." IIRC, dchinner added this to the original XFS patchset, and Dan Williams followed suit for ext4 and ext2. After brief conversations with some ext4 and xfs developers and maintainers, it seems that it may be time to consider removing this warning. For XFS, we had been holding out for reflink+dax capability, but proposals which had seemed promising now appear to be indefinitely stalled, and I think we might want to consider that dax-without-reflink is no longer EXPERIMENTAL, while dax-with-reflink is simply an unimplemented future feature. For EXT4/EXT2, I'm not aware of significant outstanding concerns that would continue to require the dire warning. Thoughts? Thanks, -Eric
