Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964833AbVKOQZv (ORCPT ); Tue, 15 Nov 2005 11:25:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964852AbVKOQZv (ORCPT ); Tue, 15 Nov 2005 11:25:51 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:45259 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S964833AbVKOQZu (ORCPT ); Tue, 15 Nov 2005 11:25:50 -0500 Subject: Re: [PATCH 1/10] Cr4 is valid on some 486s From: Arjan van de Ven To: Dave Jones Cc: "H. Peter Anvin" , Zachary Amsden , Gerd Knorr , Linus Torvalds , Pavel Machek , Andrew Morton , Linux Kernel Mailing List , Zwane Mwaikambo , Pratap Subrahmanyam , Christopher Li , "Eric W. Biederman" , Ingo Molnar In-Reply-To: <20051115161949.GC1749@redhat.com> References: <4378A7F3.9070704@suse.de> <4379ECC1.20005@suse.de> <437A0649.7010702@suse.de> <437A0710.4020107@vmware.com> <1132070764.2822.27.camel@laptopd505.fenrus.org> <20051115161041.GA1749@redhat.com> <437A0965.7020909@zytor.com> <20051115161949.GC1749@redhat.com> Content-Type: text/plain Date: Tue, 15 Nov 2005 17:25:32 +0100 Message-Id: <1132071933.2822.30.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-Spam-Score: 1.8 (+) X-Spam-Report: SpamAssassin version 3.0.4 on pentafluge.infradead.org summary: Content analysis details: (1.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.1 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address [213.93.14.173 listed in dnsbl.sorbs.net] 1.7 RCVD_IN_NJABL_DUL RBL: NJABL: dialup sender did non-local SMTP [213.93.14.173 listed in combined.njabl.org] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1069 Lines: 28 On Tue, 2005-11-15 at 11:19 -0500, Dave Jones wrote: > On Tue, Nov 15, 2005 at 08:14:29AM -0800, H. Peter Anvin wrote: > > Dave Jones wrote: > > >On Tue, Nov 15, 2005 at 05:06:03PM +0100, Arjan van de Ven wrote: > > > > > > > > You still need to preserve the originals so that you can patch in > > > both > > directions. > > > > > > > > why do you insist on both directions? That still sounds like real > > > > overkill to me. > > > > > >cpu hotplug going from UP to SMP ? :) > > > > > > > If you have CPU hotplug enabled, you can run SMP code! > > Sure, but if you boot with 1 CPU, spinlocks get nop'd to emulate UP, > and on a 'installed a new cpu' hotplug event, they all come back. the good news is that all hotplugable x86 cpus will have HT or dual core support.. so you always work in pairs of 2 - 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/