Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932218Ab3ENPK7 (ORCPT ); Tue, 14 May 2013 11:10:59 -0400 Received: from mail-wi0-f169.google.com ([209.85.212.169]:48432 "EHLO mail-wi0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757752Ab3ENPK5 convert rfc822-to-8bit (ORCPT ); Tue, 14 May 2013 11:10:57 -0400 MIME-Version: 1.0 In-Reply-To: <371E240E6FC1D44DA5E51EE9DCDCB7845E3D0BF9@NA-MBX-03.mgc.mentorg.com> References: <371E240E6FC1D44DA5E51EE9DCDCB7845E3D0BF9@NA-MBX-03.mgc.mentorg.com> Date: Tue, 14 May 2013 17:10:55 +0200 Message-ID: Subject: Re: 2013 Plumber's CFP: Fastboot From: richard -rw- weinberger To: "Mehaffey, John" Cc: "tim.bird@am.sony.com" , "wd@denx.de" , "mzjro@0pointer.net" , "Kay.Sievers@vrfy.org" , "Pomerantz, Brian" , "yoush@cs.msu.su" , "u-boot@lists.denx.de" , "genivi-dev@mail.genivi.org" , "systemd-devel@lists.freedesktop.org" , "celinux-dev@lists.celinuxforum.org" , "linux-kernel@vger.kernel.org" , "linux-embedded@vger.kernel.org" Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1982 Lines: 42 On Tue, May 14, 2013 at 1:51 AM, Mehaffey, John wrote: > Hello All, > > I am proposing a microconference on fastboot at the Linux Plumber's conference 2013 in New Orleans. The goal is to get to sub 1S boot times for a large (IVI) system using NAND flash. This pushes the state of the art, and will require innovative solutions in may areas of Linux plumbing, including bootloader, kernel init, UBI, and systemd. > > Note that fastboot improvements will (generally) help all architectures so I am not limiting this to automotive systems. > > Please visit http://wiki.linuxplumbersconf.org/2013:fastboot for more information or if you want to submit a topic. > > If you want to reply to this message, please trim the cc list! Why trimming the CC? Changing the CC list is a _very_ bad habit. Anyway, a few notes on UBI fastmap. Before we talk about optimizing it we have to make sure that it is stable. Currently it has not much users because embedded folks are a few kernel releases behind. I expect that we'll face some issues (hey it's software!). Instead of making the code more complicated we have to make very sure that it works well. Fastmap got much more complicated than I thought while developing the first proof of concept implementation. We also have to think more about userland support, e.g. making tools like ubinize fastmap aware... User want ready to use fastmap UBI images and not images which have to be converted by the kernel on the very first boot. Sharing UBI EBA table between U-Boot and the kernel would be a nice feature, but we also have to make sure that we can share the EBA table between two kernels (think of kexec). So, a more general solution is needed. -- Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/