(In reply to Eric Sandeen from comment #0)
> Now that xfsprogs supports mkfs config files, we can provide example
> configuration files to simplify creation of filesystems that are compatible
> with older releases.
> 
> The supported feature set may have changed slightly over the course of the
> RHEL7 and/or RHEL8 release, so it may be best to target RHEL8.0 and RHEL7.0,
> and not over-complicate it with minor versions.
> 
> Pavel and I had discussed this, and where the config file should go. Pavel
> had suggested it in a documentation / example sort of directory, and after
> thinking about it more, I think that might be the best plan.
> 
> A question for QE - if we ship mkfs.xfs config files for backwards
> compatibility, will that add to your testing burden, or do you think we can
> simply provide them as examples, without a need for significant additional
> testing?

Hi Eric,

What do you mean "ship mkfs.xfs config files"? As I known we didn't used mkfs configuration_file to make bigtime and inobtcount enabled by default. It's hardcode in xfs_mkfs.c now as:

.sb_feat = {
...
    .inobtcnt = true,
    .bigtime = true,
}

Do you mean you'd like to add some configuration files to xfsprogs, include a default one will be imported by mkfs.xfs, and others are optional used by users?

Thanks,
Zorro

Hi Zorro,

it's my understanding that there would be no default config - nothing changes there.

But there would be an "example" config file included in xfsprogs rpm which would make mkfs.xfs create an XFS FS, while running on rhel-9, that could be mounted on rhel-8 or rhel-7. Is this helpful?

(In reply to Pavel Reichl from comment #2)
> Hi Zorro,
> 
> it's my understanding that there would be no default config - nothing
> changes there.
> 
> But there would be an "example" config file included in xfsprogs rpm which
> would make mkfs.xfs create an XFS FS, while running on rhel-9, that could be
> mounted on rhel-8 or rhel-7. Is this helpful?

OK, so it's something likes we add a file xfsprogs/doc/rhel8-xfs.confile, then recommand using "mkfs.xfs -c option=/path/to/doc/rhel8-xfs.confile" to make a rhel8 compatible xfs on rhel9, am I right?

Thanks,
Zorro

Yes, exactly!

(In reply to Pavel Reichl from comment #4)
> Yes, exactly!

OK, if so, we'll add some test to make sure the recommanded config file(for old rhel version) works.

Thanks,
Zorro

Hi Eric,

I just noticed that in your 1st comment your also mention RHEL-7 compatible config file, however so far I only focused on RHEL-8...should I investigate and potentially reopen this BZ to add example configuration file for RHEL-7 as well?

Thanks!

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (new packages: xfsprogs), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:4022

The needinfo request[s] on this closed bug have been removed as they have been unresolved for 365 days