From owner-cvs-all Sun Sep 19 13:33: 1 1999 Delivered-To: cvs-all@freebsd.org Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.40.131]) by hub.freebsd.org (Postfix) with ESMTP id 697AA14FFD; Sun, 19 Sep 1999 13:32:50 -0700 (PDT) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.9.3/8.9.2) with ESMTP id WAA18169; Sun, 19 Sep 1999 22:30:26 +0200 (CEST) (envelope-from phk@critter.freebsd.dk) To: mjacob@feral.com Cc: Matthew Dillon , dg@root.com, Greg Lehey , cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: User block device access (was: cvs commit: src/sys/miscfs/specfs spec_vnops.c src/sys/sys vnode.h src/sys/kern vfs_subr.c) In-reply-to: Your message of "Sun, 19 Sep 1999 13:20:59 PDT." Date: Sun, 19 Sep 1999 22:30:25 +0200 Message-ID: <18167.937773025@critter.freebsd.dk> From: Poul-Henning Kamp Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk In message , Matthew Jacob writes: >> Anyway, David (and Kirk through him) has already said their piece, and >> still nobody has named an actual application which depends on bdevs >> soo... > >Isn't that reasoning in reverse? Wouldn't be fairer to state "the problems >that we have in the rest of the system are so large because we allow block >device access to user programs that we must kill off such access?". In an ideal world yes. I think the fully expanded version sounds like this: " Since having two kinds of access to the device confuses people used to Linux and Since bdevs gives rise to a complications with buffer/caching and Since having two interfaces forces us to have two majors for each device-driver and Since bdevs have not been returning write errors for 5+ years and Since most of the original reasons for having bdevs have gone away and Since nobody can show real-world applications which rely on the bdev interface then We should kill bdevs " Sounds like the preamble to a V.FOO standard from CCITT... -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." FreeBSD -- It will take a long time before progress goes too far! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message