From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753638AbZHLPaH (ORCPT ); Wed, 12 Aug 2009 11:30:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753608AbZHLPaG (ORCPT ); Wed, 12 Aug 2009 11:30:06 -0400 Received: from kroah.org ([198.145.64.141]:60168 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753586AbZHLPaE (ORCPT ); Wed, 12 Aug 2009 11:30:04 -0400 Date: Wed, 12 Aug 2009 08:25:05 -0700 From: Greg KH To: Arjan van de Ven Cc: David Dillow , Andi Kleen , Greg KH , Alan Cox , linux-kernel@vger.kernel.org, Kay Sievers , Jan Blunck , Harald Hoyer , Scott James Remnant Subject: Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev Message-ID: <20090812152505.GA29407@kroah.com> References: <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> <20090812003433.GA25392@kroah.com> <1250081813.26788.13.camel@obelisk.thedillows.org> <20090812134440.GA28839@kroah.com> <20090812070901.1c66bb67@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090812070901.1c66bb67@infradead.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 Wed, Aug 12, 2009 at 07:09:01AM -0700, Arjan van de Ven wrote: > On Wed, 12 Aug 2009 06:44:40 -0700 > Greg KH wrote: > > > On Wed, Aug 12, 2009 at 08:56:53AM -0400, David Dillow wrote: > > > On Tue, 2009-08-11 at 17:34 -0700, Greg KH wrote: > > > > On Tue, Aug 11, 2009 at 08:25:27PM -0400, David Dillow wrote: > > > > > 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. > > > > > > What systems would those be? > > > > Rescue disks, Embedded systems with no local users, servers with no > > local users, etc. Basically anything that you are only root on, and > > don't care about group permissions. > > you're speaking for devtmpfs; the tool we use actually does do group > and owners. Yes I am, sorry if anyone inferred otherwise. thanks, greg k-h