K 10 svn:author V 5 dyson K 8 svn:date V 27 1996-10-17T03:04:43.000000Z K 7 svn:log V 235 Fix a problem that could cause msync (or many other things) to deadlock. The heuristic for managment of memory backing the buffer cache was nice, but didn't work due to some architectural problems. Simplify and improve the algorithm. END