Re: Fedora 33 System-Wide Change proposal: Make btrfs the default file system for desktop variants

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On Fri, Jun 26, 2020 at 10:30 AM Lennart Poettering
<mzerqung@xxxxxxxxxxx> wrote:
>
> On Fr, 26.06.20 10:42, Ben Cotton (bcotton@xxxxxxxxxx) wrote:
>
> > https://fedoraproject.org/wiki/Changes/BtrfsByDefault
>
> If this is decided to be the way to go, please work with kernel
> maintainers to make btrfs.ko a built-in kernel module, so that
> initrd-less boots work... (it's kinda pointless anyway to have
> something as module that is now gonna used by most people anyway, it
> just slows things down for little benefit)
>

That would make sense if this were decided.  My big issue with this is
we have no internal RH expertise on btrfs, and would be entirely
dependent on the upstream community for support. There are instances
of CVEs that get ignored for long periods of time,  CVE-2019-19378 and
CVE-2019-19448 being the current examples, with the later being not a
huge deal, but still an outstanding CVE.  In general btrfs CVEs tend
to stick around longer than XFS and ext4 before a fix is pushed
upstream.   The Fedora kernel supports btrfs, it has for quite some
time, and that doesn't change regardless of the outcome of this
proposal.   I honestly cannot tell you what the stability would be
like spread across the majority of fedora users, because not being
default, the typical btrfs user probably currently has a better
understanding of what they are getting into.   While the lack of
internal RH expertise makes me lean against this proposal, I believe
the Desktop SIG with FESCo should be able to make the decisions for
defaults on the desktop spin.
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