that some distributions may have backported features into older kernels;
in particular the kernel versions in certain "enterprise distributions"
can be extremely misleading.
-.IP "\fBfiletype\fR" 2i
-ext2, 2.2.0
-.IP "\fBsparse_super\fR" 2i
-ext2, 2.2.0
-.IP "\fBlarge_file\fR" 2i
-ext2, 2.2.0
-.IP "\fBhas_journal\fR" 2i
-ext3, 2.4.15
-.IP "\fBext_attr\fR" 2i
-ext2/ext3, 2.6.0
-.IP "\fBdir_index\fR" 2i
-ext3, 2.6.0
-.IP "\fBresize_inode\fR" 2i
-ext3, 2.6.10 (online resizing)
-.IP "\fB64bit\fR" 2i
-ext4, 2.6.28
-.IP "\fBdir_nlink\fR" 2i
-ext4, 2.6.28
-.IP "\fBextent\fR" 2i
-ext4, 2.6.28
-.IP "\fBextra_isize\fR" 2i
-ext4, 2.6.28
-.IP "\fBflex_bg\fR" 2i
-ext4, 2.6.28
-.IP "\fBhuge_file\fR" 2i
-ext4, 2.6.28
-.IP "\fBmeta_bg\fR" 2i
-ext4, 2.6.28
-.IP "\fBuninit_bg\fR" 2i
-ext4, 2.6.28
-.IP "\fBmmp\fR" 2i
-ext4, 3.0
-.IP "\fBbigalloc\fR" 2i
-ext4, 3.2
-.IP "\fBquota\fR" 2i
-ext4, 3.6
-.IP "\fBinline_data\fR" 2i
-ext4, 3.8
-.IP "\fBsparse_super2\fR" 2i
-ext4, 3.16
-.IP "\fBmetadata_csum\fR" 2i
-ext4, 3.18
-.IP "\fBencrypt\fR" 2i
-ext4, 4.1
-.IP "\fBmetadata_csum_seed\fR" 2i
-ext4, 4.4
-.IP "\fBproject\fR" 2i
-ext4, 4.5
-.IP "\fBea_inode\fR" 2i
-ext4, 4.13
-.IP "\fBlarge_dir\fR" 2i
-ext4, 4.13
-.IP "\fBcasefold\fR" 2i
-ext4, 5.2
-.IP "\fBverity\fR" 2i
-ext4, 5.4
-.IP "\fBstable_inodes\fR" 2i
-ext4, 5.5
-.IP "\fBfast_commit\fR" 2i
-ext4, 5.10
-.IP "\fBorphan_file\fR" 2i
-ext4, 5.15
+.sp
+.TS
+lb l l.
+filetype ext2 2.2.0
+sparse_super ext2 2.2.0
+large_file ext2 2.2.0
+has_journal ext3 2.4.15
+ext_attr ext2/ext3 2.6.0
+dir_index ext3 2.6.0
+resize_inode ext3 2.6.10 (online resizing)
+64bit ext4 2.6.28
+dir_nlink ext4 2.6.28
+extent ext4 2.6.28
+extra_isize ext4 2.6.28
+flex_bg ext4 2.6.28
+huge_file ext4 2.6.28
+meta_bg ext4 2.6.28
+uninit_bg ext4 2.6.28
+mmp ext4 3.0
+bigalloc ext4 3.2
+quota ext4 3.6
+inline_data ext4 3.8
+sparse_super2 ext4 3.16
+metadata_csum ext4 3.18
+encrypt ext4 4.1
+metadata_csum_seed ext4 4.4
+project ext4 4.5
+ea_inode ext4 4.13
+large_dir ext4 4.13
+casefold ext4 5.2
+verity ext4 5.4
+stable_inodes ext4 5.5
+fast_commit ext4 5.10
+orphan_file ext4 5.15
+.TE
.SH SEE ALSO
.BR mke2fs (8),
.BR mke2fs.conf (5),