On Mon, Oct 15, 2018 at 09:30:01AM -0700, Darrick J. Wong wrote: > I originally thought "touch" because it updates [cm]time. :) > > Though looking at the final code, I think this can just be called from > the end of generic_remap_file_range_prep, so we can skip the export and > all that other stuff. I though about that, but the locking didn't seem to quite work out between xfs and ocfs. Nevermind the big elephant of actually converting btrfs to the "VFS" helper - I think if that doesn't work out it is rather questionable how generic they actually are.