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Jeremy Allison writes:
'" The data shows that “frozen” vendor #Linux kernels, created by branching off a release point and then using a team of engineers to select specific patches to back-port to that branch, are buggier than the upstream “stable” Linux #kernel created by Greg Kroah-Hartman. '"
https://ciq.com/blog/why-a-frozen-linux-kernel-isnt-the-safest-choice-for-security/ #LinuxKernel
@kernellogger as usual, the point is not that these are bug free, but that they are regression free. The kernel upstream releases break userspace on every new release, and kernel maintainers don't care. See https://github.com/torvalds/linux/commit/a1912f712188291f9d7d434fba155461f1ebef66 for example, as Daan just found out, which removed a mount option without caring that it is still being used, so since 6.8 every btrfs device can no longer be mounted by systemd
Well, to claim "kernel maintainers don't care" you have to at least report the bug to them[1]. That afaics has not happened yet (or I could not find it).
"since 6.8 every btrfs device can no longer be mounted by systemd": then why was this only noticed 2+ months after a release with that commit went out? This raises the question: what kind of problem did users actually run into?
[1] yes, sure, ideally they would have done a code search first, but we are all imperfect…
@kernellogger well, the kernel doesn't have a bug tracker - not for real anyway, bugzilla.kernel.org might as well be pointed to /dev/null, so no idea what "reporting" would even mean in this case. I do not use BTRFS so I am not affected, just sharing what was reported to me. It looks like it was reported against the Debian kernel package too now: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1071420
and thx for the link to the debian bug tracker; but I want to see more details first what went wrong there, as I'd expect it would be pretty unlikely that this is the first debian btrfs user that updated to 6.8 or higher; so why did it break for that user, but apparently not for the others?
@kernellogger 6.8 has just arrived in Debian unstable 3 days ago: https://tracker.debian.org/pkg/linux
@vbabka @bluca @kernellogger I've just updated my Arch installation with (encrypted) btrfs root. Seems to be no problem.
@d4nuu8 @vbabka @kernellogger I have no clue, I don't use BTRFS, I just get bug reports
@kernellogger @bluca I can confirm 6.9-rc5 is running just fine for me with openSUSE and a btrfs root filesystem on my main laptop so it looks like this may be specific to something Debian did.