Package: debvm
Version: 0.2.6
debvm-create converts the ext2 filesystem created by mmdebstrap to ext4
using the following tune2fs command:
tune2fs ... -O extents,uninit_bg,dir_index,has_journal "$IMAGE"
The ext4 filesystem created in this way does not have some of the
features that a filesystem created with mkfs.ext4 would have:
$ truncate -s "1GiB" e2
$ /sbin/mkfs.ext2 e2
$ /sbin/tune2fs -O extents,uninit_bg,dir_index,has_journal e2
$ truncate -s "1GiB" e4
$ /sbin/mkfs.ext4 e4
$ diff -U7 <(/sbin/dumpe2fs ./e2 | grep -m1 feat | tr ' ' '\n')
<(/sbin/dumpe2fs ./e4 | grep -m1 feat | tr ' ' '\n')
has_journal
ext_attr
resize_inode
dir_index
filetype
extent
+64bit
+flex_bg
sparse_super
large_file
-uninit_bg
+huge_file
+dir_nlink
+extra_isize
+metadata_csum
My (debatable) expectation is that the ext4 filesystem would have at
least all features of a standard ext4 filesystem.
Regards,
--
Gioele Barabucci
