However: I don't think it's a real leak, as performance is not getting
worse, and swap space is not being taken up. Perhaps just the
statistics are wrong (seen via /proc/meminfo).
I did an "ls; free" several times in a row, and the memory dropped by
4 pages a couple times then stopped. Running a different command then
doing "free" again showed a few less pages again. The numbers don't
drop quickly, but the number of free pages never seems to increase.