Subject: VM/fs incoherency found!
To: None <tech-kern@NetBSD.ORG>
From: der Mouse <mouse@Collatz.McRCIM.McGill.EDU>
List: tech-kern
Date: 08/02/1995 18:07:00
I believe I have finally figured out what was behind those weird
VM/filesystem incoherecy problems I was reporting.

The problem _is_ nullfs, but is _not_ locking-related.  Briefly, the
ufs/ffs/nfs code is making the VM subsystem callbacks, but with
ufs/ffs/nfs vnodes.  And it's nullfs vnodes that are being mmap()ped,
so the VM subsystem ignores the callbacks.  See PR kern/1309.

					der Mouse