xfsprogs-6.5.0 with grub 2.12~rc1-12: unknown filesystem

xfsprogs-6.5.0 with grub 2.12~rc1-12: unknown filesystem

[Martin Steigerwald]

Hi!

On recovering from some crazy filesystem corruption, probably related to 
"thou shalt not resume from this hibernation image" (posts on linux-btrfs 
mailing list, I can share link if curious), gladly no loss of important 
data involved, I recreated XFS based /boot with

xfsprogs-6.5.0 (12 Oct 2023)
[…]
        mkfs: enable reverse mapping by default (Darrick J. Wong)
        mkfs: enable large extent counts by default (Darrick J. Wong)

After that GRUB started being funny on me:

update-grub => grub-mkconfig and grub-install both told me:

unknown filesystem

grub-probe revealed that grub did not like to recognize new XFS based
/boot filesystem. So /boot is Ext4 now. I don't really care.

This is with grub 2.12~rc1-12 on Devuan Ceres.

I read on internet that similar funny stuff happened as Ext4 gained 
features. Could this be the case here as well?

Is this a known issue? I bet it needs a bug report to the GRUB developers?

Sometimes I like booting to be simpler than that. *Much* *simpler* *than* 
*that*. With less moving parts that could do crazy things.

Reminder to self: Don't start crazy experimentation adventures like 
"trying out BCacheFS with some 6.7-almost-rc2-i-dont-like-to-hibernate- 
kernel" (well the BCacheFS part of the adventure basically worked as 
expected as far as I can tell).

Ciao,
-- 
Martin

Re: xfsprogs-6.5.0 with grub 2.12~rc1-12: unknown filesystem

[Anthony Iliopoulos]

On Sun, Nov 19, 2023 at 09:16:20PM +0100, Martin Steigerwald wrote:
> Hi!
> 
> On recovering from some crazy filesystem corruption, probably related to 
> "thou shalt not resume from this hibernation image" (posts on linux-btrfs 
> mailing list, I can share link if curious), gladly no loss of important 
> data involved, I recreated XFS based /boot with
> 
> xfsprogs-6.5.0 (12 Oct 2023)
> […]
>         mkfs: enable reverse mapping by default (Darrick J. Wong)
>         mkfs: enable large extent counts by default (Darrick J. Wong)
> 
> After that GRUB started being funny on me:
> 
> update-grub => grub-mkconfig and grub-install both told me:
> 
> unknown filesystem
> 
> grub-probe revealed that grub did not like to recognize new XFS based
> /boot filesystem. So /boot is Ext4 now. I don't really care.
> 
> This is with grub 2.12~rc1-12 on Devuan Ceres.
> 
> I read on internet that similar funny stuff happened as Ext4 gained 
> features. Could this be the case here as well?

Yes this is due to enabling the large extent counts (nrext64) feature.

> Is this a known issue? I bet it needs a bug report to the GRUB developers?

See:
https://lore.kernel.org/grub-devel/20231026095339.31802-1-ailiop@suse.com/

Regards,
Anthony

Re: xfsprogs-6.5.0 with grub 2.12~rc1-12: unknown filesystem

[Martin Steigerwald]

Anthony Iliopoulos - 19.11.23, 22:06:53 CET:
> > Is this a known issue? I bet it needs a bug report to the GRUB
> > developers?
> See:
> https://lore.kernel.org/grub-devel/20231026095339.31802-1-ailiop@suse.com/

Thank you, Anthony.

So no bug report needed anymore.

-- 
Martin