Matthew Dillon reported that he and David Rhodus have tracked down and eliminated a longstanding bug that caused VM/filesystem corruption, dating from FreeBSD 4, which may even still be present in FreeBSD 5.

As a side effect, Matthew Dillon’s VFS work will get pushed into the most current code (HEAD). Unionfs and nullfs work has not been completed in the VFS code, so that means if you use HEAD and also use unionfs/nullfs, either don’t update for the next week or so, or drop back to DragonFly_Stable.