McKusick's softupdate code integrated in to NetBSD

From the NetBSD -annouce mailing list: "Frank van der Linden (frank@wins.uva.nl) has brought Kirk McKusick's trickle sync + FFS soft update code into the main tree." For the uninitiated, softupdates is an extension to FFS which collects and orders writes to the filesystem, removing unnecessary metadata writes, and carrying out necessary metadata writes asynchronously. All the speed of Linux's default filesystem configuration, with all the safety of UFS. More information at the NetBSD news page, and Kirk McKusick's softupdates page. Softupdates has been in FreeBSD for a while, it's great to see NetBSD getting it as well.