[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
I'll try to get core dev's attention this week; it'd require a Feature Freeze Exception (FFE) now to get v1.44.0 into 18.04 but as an LTS it would be better to have it from the start - and decide on the default installer/mkfs flags now rather than have users suffer later. >From that we could possibly release it to 16.04 xenial-backports. Not sure about 14.04 trusty though. The latest kernel for 14.04 is v4.4 (the GA 16.04 kernel). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1601997 Title: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
It should be noted that I recently released e2fsprogs 1.44.0 (currently in Debian Unstable, should hopefully hit Debian Testing in three more days) which turns on Metadata Checksums for everyone. https://packages.debian.org/sid/e2fsprogs Pulling in 1.44.0 into 18.04 LTS would be nice since it supports two new features, largedir and ea_inode, (neither turned on by default yet, but the second in particular is very useful for Samba servers since it was written specifically to efficiently support Windows ACL's and Security ID's better than any other file system by supporting xattr dedupe.) http://e2fsprogs.sourceforge.net/e2fsprogs-release.html#1.44.0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1601997 Title: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
Canonical please read Theodore Tso's Comment #4 above, and consider for
Ubuntu 18.04 LTS!
This "64bit,metadata_csum" creates compatibility-issues even with 16.04
LTS, and does not seem to provide a huge benefit [>16TB fs support,
slightly stronger metadata checksumming].
This creates all sorts of problems for compatibility/portability of
filesystems, e.g.:-
* dual-booting 18.04, even previous LTS version cannot fsck the filesystem.
* "ext4 portable disks" created by 18.04 similarly same problem.
* Also consider how wide is the 64bit,metadata_csum support anyway, users may
want disks to work with many distros/drivers? Canonical's
commercial-supporters may have views herein?. -- the linked bugreport also
mentions another issue with hwe-edge and LVM.
Also note, turning off the 64bit,metadata_csum when required is a total
PAIN, needing filesystem offline, fsck and tune2fs in careful
concert.
In my view, the 16.04 LTS mke2fs.conf [ ext4{} stanza with
"auto_64-bit_support = 1" and NO "64bit,metadata_csum" in "features" ]
should be seriously-considered for 18.04 "LTS" (even if 18.10 onwards follow
Debian).
As tytso says, this 'change' has been "Decision-by-Default" due to
importing a Debian upstream package, I would like Canonical to make an
'informed and considered decision' about this please!.
Hope that helps!
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Title:
Ubuntu 16.10 installer sets metadata_csum option on ext4 partition
which is incompatible with other LTS Ubuntu versions
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[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
An issue for 18.04 too, reported in IRC. There is a related bug "Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming" https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1365874 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1601997 Title: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
** Changed in: e2fsprogs (Ubuntu) Status: Invalid => Triaged ** Changed in: e2fsprogs (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1601997 Title: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
I have got a problem because of the non-matching features, too: I formatted a new drive with ext4 under Ubuntu 16.10 and added it to the fstab of my precise and trusty installations. These two LTS installations stop during the boot press giving me an error because e2fsck does not recognize the new features. (The problem does not occur for xenial.) As Norbert and Theodor above: e2fsprogs 1.43 should be backported to precise and trusty; especially now that the new features are enabled by default. In trusty, I am now using Daniel Mehrmann's PPA, which is offering a snapshot of e2fsck 1.43. Daniel Mehrmann's package does not build in precise because it seems to need a newer version of libc6. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1601997 Title: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
One bit of context --- metadata_csum is not enabled by default in the official upstream e2fsprogs.tar.gz file. So with my upstream maintainer hat, I deliberately decided not to enable it by default, and mentioned in the release notes that individual distributions should decide whether they wanted to enable it. So with the upstream e2fsprogs tarball, the user can still request metadata_csum by asking for it explicitly: mke2fs -t ext4 -O metadata_csum. With my *Debian* maintainer hat on (well, with some egging on with my upstream maintainer persona :-), I decided to enable metadata_csum by default so that in the testing and unstable branches, metadadata_csum checking would get some additional exposure, and hence testing. This gambit has worked. There have been a number of bug between 1.43 and 1.43.3 that were fixed because they were reported by Debian users. Whether I will continue leaving metadata_csum enabled right before Debian Stretch goes into final lockdown for the Debian Stable release is not something I have decided, but so far the bug report rate has been positive. Ubuntu has apparently adopted the Debian enablement of metadata_csum by default, because it's based on the Debian 1.43.3-1 package. However, there may be some differences between Ubuntu and Debian --- the average technical sophistication of a Debian vs. a Ubuntu user, compatibility constraints with Ubuntu LTS, etc. --- that may drive a different decision with respect to mke2fs's *defaults*. It would be good if a decision is made explicitly by Ubuntu / Canonical to decide what best makes since for Ubuntu. If you decide that Ubuntu 16.10 is a community distro, and you want to help me test metadata_csum, that's great.I have had some experiences with less-than-savvy Ubuntu users who really struggled with filing a useful bug report and participating in root causing a bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1601997 Title: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
I don't see how turning on a new feature is a bug. ** Changed in: e2fsprogs (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1601997 Title: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions
There is a linked bug 1365874 about adding 'metadata_csum' to e2fsk in LTS versions. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1601997 Title: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
