On Thu, Aug 29, 2019 at 09:20:50PM +1000, Matthew Bobrowski wrote: > Uh ha! So, we conclude that there's no need to muck around with hairy > ioend's, or the need to denote whether there's unwritten extents held > against the inode using tricky state flag for that matter. So in XFS we never had the i_unwritten counter, that is something purely ext4 specific, and I can't really help with that unfortunately, but maybe the people who implemented it might be able to help on that one.