From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030789AbWKOSC2 (ORCPT ); Wed, 15 Nov 2006 13:02:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030787AbWKOSC1 (ORCPT ); Wed, 15 Nov 2006 13:02:27 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:42904 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1030790AbWKOSC0 (ORCPT ); Wed, 15 Nov 2006 13:02:26 -0500 Date: Wed, 15 Nov 2006 19:01:05 +0100 From: Ingo Molnar To: Eric Dumazet Cc: Andi Kleen , akpm@osdl.org, Arjan van de Ven , Jeremy Fitzhardinge , linux-kernel@vger.kernel.org Subject: Re: [PATCH] i386-pda UP optimization Message-ID: <20061115180105.GA29795@elte.hu> References: <1158046540.2992.5.camel@laptopd505.fenrus.org> <200611151846.31109.dada1@cosmosbay.com> <20061115174957.GA27827@elte.hu> <200611151858.09958.dada1@cosmosbay.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200611151858.09958.dada1@cosmosbay.com> User-Agent: Mutt/1.4.2.2i X-ELTE-SpamScore: -4.4 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-4.4 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] 1.5 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 * Eric Dumazet wrote: > > > + GET_CPU_NUM(%ebx) \ > > > PER_CPU(cpu_gdt_descr, %ebx); \ > > > movl GDS_address(%ebx), %ebx; \ > > > > %ebx very definitely wants to have a current CPU number loaded ;) Pick > > it up from the task struct. > > Hum.... Are you sure ? > > For UP we have this PER_CPU definition : > > #define PER_CPU(var, cpu) \ > movl $per_cpu__/**/var, cpu; hm, you are right. No quick ideas then. Ingo