Re: [Libguestfs] Intent to retire: zerofree

zerofree is a package that can take an ext2 (only?) filesystem, work out what parts of the filesystem are not used, and either zero them or sparsify them. This was useful in about 2009 when I added it to Fedora. However nowadays it's more convenient to use the equivalent kernel functionality (via the ‘fstrim’ command or equivalent ioctls). The kernel functionality also works correctly for other filesystem types. There's also a more serious data safety issue: Although this probably works OK for ext2 since that format is frozen in time, it probably corrupts ext4 filesystems containing features that it doesn't know about. It is for these reasons that I don't think you should use this package and I intend to retire it unless anyone says otherwise