From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752590AbZHHWQw (ORCPT ); Sat, 8 Aug 2009 18:16:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751870AbZHHWQv (ORCPT ); Sat, 8 Aug 2009 18:16:51 -0400 Received: from casper.infradead.org ([85.118.1.10]:44693 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751836AbZHHWQv (ORCPT ); Sat, 8 Aug 2009 18:16:51 -0400 Date: Sat, 8 Aug 2009 15:19:16 -0700 From: Arjan van de Ven To: Greg KH Cc: Alan Cox , linux-kernel@vger.kernel.org, Kay Sievers , Jan Blunck , gregkh@suse.de, Harald Hoyer , Scott James Remnant Subject: Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev Message-ID: <20090808151916.61aab3b2@infradead.org> In-Reply-To: <20090805182805.GA7534@kroah.com> References: <20090805171513.GA10443@kroah.com> <20090805192037.19c54c4d@lxorguk.ukuu.org.uk> <20090805182805.GA7534@kroah.com> Organization: Intel X-Mailer: Claws Mail 3.7.1 (GTK+ 2.14.7; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 5 Aug 2009 11:28:05 -0700 Greg KH wrote: > > and Arjan (who is doing about the fastest Linux boot anyone has and > > has better data than anyone else) > > We did this work based on Arjan's work. It solves a problem that > Moblin has as well, which is why Novell is using it for their > Moblin-based images they are shipping. It makes things go faster, > with a simpler userspace codepath, and we have the numbers as have > been previously posted. Uhm. > > plus > > > > > Eric has shown that just making the nodes is 0.06 seconds with > > > todays sysfs interface, and there is room for improvement, > > A 0.06 speedup is still a speedup, right? :) it really is only this much. Do we need to post the program again that we use to make all dev nodes based on sysfs ? Including the flexibility to have non-default owners and permissions? > Seriously, we saw much more than that, about 0.5 what I last > remember, Kay? I would find that hard to believe, there isn't 0.5 on the table any which way you look at it. -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org