From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932344AbXDJAgm (ORCPT ); Mon, 9 Apr 2007 20:36:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965996AbXDJAgm (ORCPT ); Mon, 9 Apr 2007 20:36:42 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:58958 "EHLO ebiederm.dsl.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932344AbXDJAgl (ORCPT ); Mon, 9 Apr 2007 20:36:41 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Robin Holt Cc: Roland McGrath , Oleg Nesterov , Andrew Morton , Davide Libenzi , Ingo Molnar , Linus Torvalds , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: Re: [RFC, PATCH 1/3] introduce SYS_CLONE_MASK References: <20070409020600.6338BD82F4@pipsqueak.sf.frob.com> <20070409173053.GD22997@lnx-holt.americas.sgi.com> Date: Mon, 09 Apr 2007 18:35:39 -0600 In-Reply-To: <20070409173053.GD22997@lnx-holt.americas.sgi.com> (Robin Holt's message of "Mon, 9 Apr 2007 12:30:53 -0500") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Robin Holt writes: > OK. I just got the OK from management. The system we were booting was > for research only. We had NR_CPUS=num_online_cpus()=4096 which were > non-hyperthreaded. With no attached I/O and the tweak I originally > posted plus one change Jack has already gotten accepted, the machine > booted in approx 12 minutes. How much of that time was between the time the kernel was loaded and before user space was started? Twelve minutes sounds like a long time for a boot, if you aren't fsck'ing filesystems. Eric