Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965103AbWH2Qot (ORCPT ); Tue, 29 Aug 2006 12:44:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965105AbWH2Qot (ORCPT ); Tue, 29 Aug 2006 12:44:49 -0400 Received: from gw.goop.org ([64.81.55.164]:1672 "EHLO mail.goop.org") by vger.kernel.org with ESMTP id S965103AbWH2Qos (ORCPT ); Tue, 29 Aug 2006 12:44:48 -0400 Message-ID: <44F46EF9.2090000@goop.org> Date: Tue, 29 Aug 2006 09:44:41 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 1.5.0.5 (X11/20060803) MIME-Version: 1.0 To: Jan Engelhardt CC: Arjan van de Ven , Dong Feng , Andi Kleen , Nick Piggin , Paul Mackerras , Christoph Lameter , David Howells , linux-kernel@vger.kernel.org Subject: Re: The 3G (or nG) Kernel Memory Space Offset References: <1156867503.2722.72.camel@laptopd505.fenrus.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 593 Lines: 15 Jan Engelhardt wrote: > Since it's all just virtual addresses, is the TLB flush really that much > different when kernelspace runs from (virtual) 0x00000000-0x3FFFFFFF rather > than (virtual)0xC000000-0xFFFFFFFF? > If kernel and userspace are disjoint, they can be in the same address space, so there's no need for a TLB flush at all. J - 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/