From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755123AbZHLAjt (ORCPT ); Tue, 11 Aug 2009 20:39:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754975AbZHLAjs (ORCPT ); Tue, 11 Aug 2009 20:39:48 -0400 Received: from kroah.org ([198.145.64.141]:34065 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754954AbZHLAjr (ORCPT ); Tue, 11 Aug 2009 20:39:47 -0400 Date: Tue, 11 Aug 2009 17:34:33 -0700 From: Greg KH To: David Dillow Cc: Andi Kleen , Greg KH , Alan Cox , linux-kernel@vger.kernel.org, Kay Sievers , Jan Blunck , Harald Hoyer , Scott James Remnant , Arjan van de Ven Subject: Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev Message-ID: <20090812003433.GA25392@kroah.com> References: <20090805182805.GA7534@kroah.com> <20090805185136.GA21442@kroah.com> <87ljlxhrnr.fsf@basil.nowhere.org> <1249575658.19886.8.camel@lap75545.ornl.gov> <20090806183147.GA28409@suse.de> <1249772876.22248.34.camel@obelisk.thedillows.org> <20090810153943.GB7652@kroah.com> <1250001374.22248.65.camel@obelisk.thedillows.org> <20090811145523.GD14368@basil.fritz.box> <1250036727.26788.7.camel@obelisk.thedillows.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1250036727.26788.7.camel@obelisk.thedillows.org> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 11, 2009 at 08:25:27PM -0400, David Dillow wrote: > On Tue, 2009-08-11 at 16:55 +0200, Andi Kleen wrote: > > > No, not really. It isn't hard to make a static /dev, or a rescue initrd > > > for the cases with dynamic device numbers. > > > > There's a world between strictly controlled embedded and fully general > > distributions. > > Sure, and I've acknowledged that. But it doesn't mean this needs a > kernel solution. > > > I want a dynamic /dev, but a fast one that doesn't need initrd or > > slows down booting. > > So use Eric/Arjan's program that does it in 60ms -- you get a > dynamic /dev, no initrd, fast boot, and no kernel changes required. Their program only handles it for a reconstruction of /dev based on sysfs one time at boot. It does not handle things that are added or discovered by the system after that, you need udev for that. So it's a great hack for boot time stuff, but not a complete /dev management replacement like this code can be for numerous systems. thanks, greg k-h