From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752039AbaHaWpV (ORCPT ); Sun, 31 Aug 2014 18:45:21 -0400 Received: from mail-pa0-f46.google.com ([209.85.220.46]:62709 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751429AbaHaWpQ (ORCPT ); Sun, 31 Aug 2014 18:45:16 -0400 User-Agent: K-9 Mail for Android In-Reply-To: <5403A273.4070504@linux.intel.com> References: <99jhsb6abtsilpt3j5nu991b.1409513632114@email.android.com> <5403A273.4070504@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Subject: Re: [RFC v1 0/3] driver-core: add asynch module loading support From: Dmitry Torokhov Date: Sun, 31 Aug 2014 15:45:11 -0700 To: Arjan van de Ven , =?UTF-8?B?5ZC056ug6YeR?= , Greg KH CC: "Luis R. Rodriguez" , "tiwai@suse.de" , "tj@kernel.org" , "linux-kernel@vger.kernel.org" , "oleg@redhat.com" , "akpm@linux-foundation.org" , "penguin-kernel@i-love.sakura.ne.jp" , "joseph.salisbury@canonical.com" , "bpoirier@suse.de" , "Luis R. Rodriguez" Message-ID: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On August 31, 2014 3:32:19 PM PDT, Arjan van de Ven wrote: >On 8/31/2014 1:06 PM, 吴章金 wrote: >> Hi, folks >> >> I'm back to this discussion, >> >> The original requirement of my first RFC patchset is mainly for >Android Smartphone use case: >> >> 1. We want light on LCD and draw a logo immediately after power key >press(don't consider uboot or lk biotloader here). >> 2. We want the whole kernel boot fast to give user the Android Launch >deaktop >> 3. The modem initialization/reset is slow >> 4. The Touchpad firmware upgrade is slow >> 5. We have many cpu cores(up to 8 in latest exynos 5430 and >MT6595...) >> 6. We have few schedulable/parallellizable threads >> 7. We compiled all of the modules in the kernel(stupid? avoid >modprobe...but lose parallelization in userspace) >> >> So, I think about is that possible to async most of the probes, but >still reserve the requred dependencies to let them still work as >expected. > >you can boot a whole kernel including all graphics in less than 0.5 >seconds, even without this patchset. You forgot to add "on certain subset of hardware and configuration". Thanks. -- Dmitry