New patch at http://www.panix.com/~tls/rnd3.diff which has Jachym Holecek's fix for the "data corruption" issue (which isn't, actually), makes the sysctl prng IPL_NONE, and fixes some issues revealed by LOCKDEBUG.
Also, this fixes a very old and ugly bug where rnd_add_data manipulated the entropy pool directly without locking. This actually seems fairly stable for me, so I'm curious about others' results. A good way to test is: while true; do sysctl kern.urandom > /dev/null; done I'll do some KNF cleanup and hook this up to the pseudodevice nodes next, and we can see how it performs. Thor