Is there a way to flag specific directories "nodatacow"?

[George Mitchell]

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html