Some nights we get errors like these:
Pass3: Rescan subtree failed
Error in wait_pid (balloon.c:971): The /usr/sbin/e4defrag2 process failed with code 1
Which don't really give any indication as to which ploop/container is the issue.
Can these be safely ignored or should we be trying to track down what's up?
Also: should we be expecting pcompact to gracefully handle these errors instead of simply reporting them as output to cron?