Re: filesystems and year 2038

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> >> Hi, creating a thread on this from:
> >> https://github.com/coreos/fedora-coreos-config/pull/1650
> >>
> >> Basically I'd propose that not just our default images have y2038-compatible filesystem setups, we ensure that if e.g. XFS is explicitly chosen for a Workstation installation then it is set up with bigtime=1.
> >>
> >> (Note btrfs uses 64 bit time today, so I think this is mostly about ext4 and xfs, but perhaps we also need to look at the longer tail too, e.g. squashfs.  OTOH, because squashfs is read-only we can just worry about that closer to 10 years from now...)
> >>
> >> If no one objects I guess I can look at re-learning Mediawiki syntax again and writing a Change.
> >
> > Or, you could ignore it and it will happen anyway:
> >
> > xfsprogs-5.15.0-rc1 (11 Mar 2022)
> > - mkfs: enable inobtcount and bigtime by default (Darrick J. Wong)
> > _______________________________________________
>
> Nice. Thanks for the link to that change. Does anyone know if ext4 is thinking of doing the same?

Is ext4 actually a problem here? From the y2038 list [1] the ext4 with
"new inodes" which has the option of "34 bit seconds / 30-bit ns" has
a rollover date of 2582. The new extended i_ctime_extra [2] was added
in 2007 and apparently made the default in 2008 [3] so it appears we
should be good there but you've not gone into any detail of your
concern here so if you could extrapolate on that it would be grand.

[1] https://github.com/y2038/y2038-list
[2] https://elixir.bootlin.com/linux/v5.18-rc1/source/fs/ext4/ext4.h#L835
[3] https://www.mail-archive.com/y2038@xxxxxxxxxxxxxxxx/msg04261.html
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