[Bug 276985] crash in LinuxKPI/drm

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276985

--- Comment #62 from Tomasz "CeDeROM" CEDRO <tomek@cedro.info> ---
after short consideration i will stick to 13.3 on my production. i really like
to play but i need to work on that particular machine. there is no guarantee a
hardware upgrade will remove all of the issues not introducing new ones and i
have still some ports here unavailable on modern motherboards. i will keep the
additional drive for testing and switch os when there is something to test.

my main concern is serious filesystem damage during all those kernel panics:
* i did use separate disk and UFS install not to touch production data on ZFS
drives. also to test impact on filesystem.
* each kernel panic caused UFS corruption.
* even though UFS SU+J was not detected on next boot it finally got to point
where init asked me to fsck by hand. in that case i had to run `fsck -fy /`
several times until no problem was found (!!). then i could not run xorg or
reinstall previously compiled drm ports because filesystem was corrupted
anyway!
* frequent power on/off also impacts hdd lifetime and condition and i have 6
hdd zraid.
* it is not a problem for system packages that i can reinstall with pkg but a
serious problem for config files or (NN TB of) data files that cannot be that
easily restored.
* i remember last time i upgraded to 14.0 and had frequent kernel panics from
drm and then rolled back to 13.2 just to make sure no damage is done i noticed
zfs corruption on big files reported by zpool status. those errors could not be
fixed (scrub / resilver) and i had to delete them. luckily i did not upgrade
zpool because there would be no way back.

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