core/e2fsprogs/mke2fs.conf

[defaults]
	base_features = sparse_super,filetype,resize_inode,dir_index,ext_attr
	blocksize = 4096
	inode_size = 128
	inode_ratio = 16384

[fs_types]
	small = {
		blocksize = 1024
		inode_size = 128
		inode_ratio = 4096
	}
	floppy = {
		blocksize = 1024
		inode_size = 128
		inode_ratio = 8192
	}
	news = {
		inode_ratio = 4096
	}
	largefile = {
		inode_ratio = 1048576
	}
	largefile4 = {
		inode_ratio = 4194304
	}