linux-ext4 - fast_commit option not recognized/supported by e2fsck?

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Date:   Mon, 16 May 2022 15:00:14 +0530
From:   "Lakshmipathi.G" <lakshmipathi.g@...il.com>
To:     linux-ext4@...r.kernel.org
Subject: fast_commit option not recognized/supported by e2fsck?

Hi,
Seems like I can't use the new fast_commit option.

Steps:
$ apt-get install gcc make bison -y && wget
https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/snapshot/e2fsprogs-1.46.4.tar.gz
tar -xvf e2fsprogs-1.46.4.tar.gz && cd e2fsprogs-1.46.4 && ./configure
&& make -j2 && sudo make install
$ sudo tune2fs -O fast_commit /dev/nvme0n1p2
# and verified flags with
$ sudo tune2fs -l /dev/nvme0n1p2 | grep fast_commit
Filesystem features:      has_journal ext_attr resize_inode dir_index
fast_commit filetype needs_recovery extent 64bit flex_bg sparse_super
large_file huge_file dir_nlink extra_isize metadata_csum
$ e2fsck -V
e2fsck 1.46.4 (18-Aug-2021)
Using EXT2FS Library version 1.46.4, 18-Aug-2021
$ uname -a
Linux db 5.13.0-1022-aws #24~20.04.1-Ubuntu SMP Thu Apr 7 22:14:11 UTC
2022 aarch64 aarch64 aarch64 GNU/Linux

Now I did a reboot and the system hangs. It shows the following error
message. Any thoughts on what's going wrong here? thanks!

```
Begin: Will now check root file system ... fsck from util-linux 2.34
[/usr/sbin/fsck.ext4 (1) -- /dev/nvme0n1p2] fsck.ext4 -a -C0 /dev/nvme0n1p2
/dev/nvme0n1p2 has unsupported feature(s): fast_commit
e2fsck: Get a newer version of e2fsck!

/dev/nvme0n1p2: ********** WARNING: Filesystem still has errors **********

fsck exited with status code 12
done.
Failure: File system check of the root filesystem failed
The root filesystem on /dev/nvme0n1p2 requires a manual fsck
```

----
Cheers,
Lakshmipathi.G
http://www.giis.co.in https://www.webminal.org