> > Is there any way to "unshare" these worst cases without having to > > btrfs defragment everything? > > Btrfs defrag should do that, but at the cost of hugely increased space > usage. Yeah, that's why I was asking for a way to do it without btrfs defrag, somehow have only those extents split up and update the references in the inodes. > BTW, have you verified the content of that extent? > Is that all zero? If so, just find a tool to punch all these files and > you should be OK to go. How I can get the content of those objectids and find out which inodes reference them?
