From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754088AbZBJBvb (ORCPT ); Mon, 9 Feb 2009 20:51:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752957AbZBJBvX (ORCPT ); Mon, 9 Feb 2009 20:51:23 -0500 Received: from gw.goop.org ([64.81.55.164]:34335 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752909AbZBJBvW (ORCPT ); Mon, 9 Feb 2009 20:51:22 -0500 Message-ID: <4990DD97.5090705@goop.org> Date: Mon, 09 Feb 2009 17:51:19 -0800 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.19 (X11/20090105) MIME-Version: 1.0 To: Tejun Heo CC: hpa@zytor.com, tglx@linutronix.de, mingo@elte.hu, linux-kernel@vger.kernel.org, x86@kernel.org, rusty@rustcorp.com.au, Jeremy Fitzhardinge Subject: Re: [PATCH 10/11] x86: make lazy %gs optional on x86_32 References: <1234186798-16820-1-git-send-email-tj@kernel.org> <1234186798-16820-11-git-send-email-tj@kernel.org> <49907203.4010009@goop.org> <4990D817.7010906@kernel.org> In-Reply-To: <4990D817.7010906@kernel.org> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Tejun Heo wrote: > Hmmm... I was (lazily) trying to add that %gs can only be cleared if > it's being managed lazily because otherwise it might be being used by > the kernel for other purposes. :-) > > Is my understanding correct? Oh, hm, I see. We only want to zero it if we're using lazy gs, otherwise it contains something useful... I need to run now, but I'll look at it again in a few hours. J