From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262844AbTJJOuV (ORCPT ); Fri, 10 Oct 2003 10:50:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262848AbTJJOuV (ORCPT ); Fri, 10 Oct 2003 10:50:21 -0400 Received: from netrealtor.ca ([216.209.85.42]:5383 "EHLO mark.mielke.cc") by vger.kernel.org with ESMTP id S262844AbTJJOuR (ORCPT ); Fri, 10 Oct 2003 10:50:17 -0400 Date: Fri, 10 Oct 2003 10:48:37 -0400 From: Mark Mielke To: William Lee Irwin III , G?bor L?n?rt , Stuart Longland , Stephan von Krawczynski , Fabian.Frederick@prov-liege.be, linux-kernel@vger.kernel.org Subject: Re: 2.7 thoughts Message-ID: <20031010144837.GB12134@mark.mielke.cc> References: <20031009115809.GE8370@vega.digitel2002.hu> <20031009165723.43ae9cb5.skraw@ithnet.com> <3F864F82.4050509@longlandclan.hopto.org> <20031010125137.4080a13b.skraw@ithnet.com> <3F86BD0E.4060607@longlandclan.hopto.org> <20031010143529.GT5112@vega.digitel2002.hu> <20031010144723.GC727@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20031010144723.GC727@holomorphy.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 10, 2003 at 07:47:23AM -0700, William Lee Irwin III wrote: > On Fri, Oct 10, 2003 at 04:35:29PM +0200, G?bor L?n?rt wrote: > > Why? Sure, you should note OS before unplug a CPU ;-) but in this case OS > > should be noticed that it could not use that CPU any more (like scheduler, > > interrupt delivering etc). And then it's not an issue if you unplug THAT > > cpu. Sure, some hw supporting is needed, a "normal" motherboard does not > > like to unplug a CPU when powered of course by hardware issues, but "CPU > > hotplug capable" motherboards can support this. Maybe of course some notice > > mechanism is needed for the motherboard as well not only for the OS, but it > > only mean that notfication before unplugging the CPU should be delivered to > > the OS _and_ to the hardware. Sure, I have no experience at all in this Perhaps I've naive here, but - with hot-pluggable CPU machines, do you not de-activate the CPU through software first, before pulling the CPU out, at which point it is not in use? mark -- mark@mielke.cc/markm@ncf.ca/markm@nortelnetworks.com __________________________ . . _ ._ . . .__ . . ._. .__ . . . .__ | Neighbourhood Coder |\/| |_| |_| |/ |_ |\/| | |_ | |/ |_ | | | | | | \ | \ |__ . | | .|. |__ |__ | \ |__ | Ottawa, Ontario, Canada One ring to rule them all, one ring to find them, one ring to bring them all and in the darkness bind them... http://mark.mielke.cc/