If you pay attention to your daily security run emails on your DragonFly system, you may see entries like this:

+nlookup() at nlookup+0x623 0xffffffff806eff13
+kern_rmdir() at kern_rmdir+0x25 0xffffffff80706db5
+sys_rmdir() at sys_rmdir+0x4c 0xffffffff80706f0c
+syscall2() at syscall2+0x11e 0xffffffff80bd9f9e

I see it on the machine where I run this Digest, as the caching mechanism adds and deletes files rapidly.  Matthew Dillon has placed it behind a sysctl, so your messages log will be a little less noisy by default.