I am seeing massive journal corruptions that seem to be unique to btrfs
and I am suspecting that cow might be causing them. My bandaid fix for
this will be to mark the /var filesystem "nodatacow" at boot. But I am
wondering if their is any way to flag a particular directory as
"nodatacow" outside of the mount process. I would like to be able to
mark /var/log/journal as "nodatacow" for example, without having to
declare it a subvolume and mount it separately.
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