From owner-freebsd-current@FreeBSD.ORG Wed Jun 18 23:57:50 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F012537B404; Wed, 18 Jun 2003 23:57:50 -0700 (PDT) Received: from freebie.xs4all.nl (freebie.xs4all.nl [213.84.32.253]) by mx1.FreeBSD.org (Postfix) with ESMTP id C74E043FAF; Wed, 18 Jun 2003 23:57:49 -0700 (PDT) (envelope-from wkb@freebie.xs4all.nl) Received: from freebie.xs4all.nl (localhost [127.0.0.1]) by freebie.xs4all.nl (8.12.9/8.12.9) with ESMTP id h5J6vmb0071889; Thu, 19 Jun 2003 08:57:48 +0200 (CEST) (envelope-from wkb@freebie.xs4all.nl) Received: (from wkb@localhost) by freebie.xs4all.nl (8.12.9/8.12.9/Submit) id h5J6vmb3071888; Thu, 19 Jun 2003 08:57:48 +0200 (CEST) Date: Thu, 19 Jun 2003 08:57:48 +0200 From: Wilko Bulte To: Maxime Henrion Message-ID: <20030619065748.GB71841@freebie.xs4all.nl> References: <43720.1055971536@critter.freebsd.dk> <3EF0DE3A.5040605@myrealbox.com> <20030618231656.GW21011@elvis.mu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030618231656.GW21011@elvis.mu.org> User-Agent: Mutt/1.4i X-OS: FreeBSD 4.8-STABLE X-PGP: finger wilko@freebsd.org cc: walt cc: freebsd-current@FreeBSD.ORG Subject: Re: Proof of concept patch for device rearrangement X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Jun 2003 06:57:51 -0000 On Thu, Jun 19, 2003 at 01:16:56AM +0200, Maxime Henrion wrote: > walt wrote: > > Poul-Henning Kamp wrote: > > > > >I have uploaded a proof of concept patch: > > > > > > http://phk.freebsd.dk/patch/fd_dev.patch > > > > > > >...And with this code enabled, it is possible to go from userland to > > >device driver without touching Giant underway. > > > > I'm sorry, I can't parse that last sentence. Could you explain in > > 25 words or less (or 3 lines of code) what it means? > > > > 'Giant' is the lock that Alan is trying to get rid of? > > Giant is the big lock that protects the whole kernel that everyone is > trying to get rid of :-). Get rid of the lock that is ;-) -- | / o / /_ _ wilko@FreeBSD.org |/|/ / / /( (_) Bulte