From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthieu CASTET Subject: Re: Super Fast Boot of Embedded Linux: 300 ms from boot loader to shell Date: Thu, 14 Apr 2011 09:43:35 +0200 Message-ID: <4DA6A5A7.2060701@parrot.com> References: <4DA331F9.5070902@gmail.com> <4DA5DD10.6030305@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <4DA5DD10.6030305@gmail.com> Sender: linux-embedded-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="windows-1252" To: Marco Stornelli Cc: Constantine Shulyupin , "linux-embedded@vger.kernel.org" Hi, Marco Stornelli a =E9crit : > Il 13/04/2011 16:53, Constantine Shulyupin ha scritto: >> Thank you Marco for your feedback. I've added summary of used >> optimization method: >> =95 Reduction of kernel and filesystem size >> =95 Kernel features: naked boot, initrd without compression >> =95 Optimization of NAND flash interface in boot loader >> =95 Boot time was measured with utility tstamp >> =95 You can find more detailed list of methods at http://elinux.org/= Boot_Time >> =95 Techniques for improving embedded Linux startup time, presentati= on: >> http://www.makelinux.com/emb/fastboot/MontaVista >> >> Actually, detailed implementations of optimization methods are >> described in numerous documents. >=20 > I really know. I was talking about *your* optimization method, but if= I=20 > well understand you've just applied a list of well known methods. Not to say such case are not interesting : loading a linux kernel with = only a serial driver, a ramdisk and a shell as init doesn't reflect reality. In real product what you want if fast user interaction (sound, mounting= big filesystem with user data, lcd display, ...) Matthieu