Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751223AbWHZWNk (ORCPT ); Sat, 26 Aug 2006 18:13:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751224AbWHZWNk (ORCPT ); Sat, 26 Aug 2006 18:13:40 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:36485 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1751223AbWHZWNj (ORCPT ); Sat, 26 Aug 2006 18:13:39 -0400 Date: Sun, 27 Aug 2006 00:05:25 +0200 From: Ingo Molnar To: Linus Torvalds Cc: Dave Jones , Andrew Morton , ego@in.ibm.com, rusty@rustcorp.com.au, linux-kernel@vger.kernel.org, arjan@intel.linux.com, vatsa@in.ibm.com, dipankar@in.ibm.com, ashok.raj@intel.com Subject: Re: [RFC][PATCH 0/4] Redesign cpu_hotplug locking. Message-ID: <20060826220525.GA27933@elte.hu> References: <20060824102618.GA2395@in.ibm.com> <20060824091704.cae2933c.akpm@osdl.org> <20060825095008.GC22293@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: -2.9 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.9 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.5 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.5000] -0.1 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 884 Lines: 21 * Linus Torvalds wrote: > I personally doubt that it's the case that we'd want to accelerate > inclusion - very few things actually do CPU hotplug, and right now the > only way to even hit the sequences in normal use is literally just the > "suspend under SMP" case that hasn't historically worked very well > anyway, but was what made at least me personally aware of the problems > ;^). there's also bootup on SMP that is technically a series of hot-cpu-add events. That already tests some aspects of it. Maybe we should turn shutdown into the logical reverse: into a series of hot-cpu-remove events? Ingo - 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/