It has been superseded by open source erofs-utils, see git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs-utils.git This repo is just for archive only. a brief usage of the prelimitary huawei version of erofs.mkfs: erofs.mkfs [-zlz4hc] [-dX] [-hX] output.img indir options: -zlz4hc enable file compression with the lz4hc algorithm (default: no compression) -dX set the debugging message level -hX set the minimum reference count requirement of shared xattrs