From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030867AbWKOStG (ORCPT ); Wed, 15 Nov 2006 13:49:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030865AbWKOStF (ORCPT ); Wed, 15 Nov 2006 13:49:05 -0500 Received: from gw.goop.org ([64.81.55.164]:40079 "EHLO mail.goop.org") by vger.kernel.org with ESMTP id S1030863AbWKOStB (ORCPT ); Wed, 15 Nov 2006 13:49:01 -0500 Message-ID: <455B611C.3010503@goop.org> Date: Wed, 15 Nov 2006 10:49:00 -0800 From: Jeremy Fitzhardinge User-Agent: Thunderbird 1.5.0.8 (X11/20061107) MIME-Version: 1.0 To: Ingo Molnar CC: Arjan van de Ven , akpm@osdl.org, ak@suse.de, linux-kernel@vger.kernel.org, Michael.Fetterman@cl.cam.ac.uk, Ian Campbell Subject: Re: i386 PDA patches use of %gs References: <1158046540.2992.5.camel@laptopd505.fenrus.org> <45075829.701@goop.org> <20060913095942.GA10075@elte.hu> <45082F1C.8000003@goop.org> <20061115182613.GA2227@elte.hu> <455B5ED8.5090005@goop.org> <20061115184315.GA5078@elte.hu> In-Reply-To: <20061115184315.GA5078@elte.hu> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar wrote: > but it does not actually use the 'normal usermode TLS selector' - it > only loads it. > > a meaningful test would be to allocate two selector values and load and > read+write memory through both of them. > Well, obviously in one case it would need to switch between null/non-null/null. But yes, good point about using the "usermode" %gs each iteration. I'll do some more tests. J