Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 30 Oct 2000 04:41:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 30 Oct 2000 04:41:00 -0500 Received: from chiara.elte.hu ([157.181.150.200]:46854 "HELO chiara.elte.hu") by vger.kernel.org with SMTP id ; Mon, 30 Oct 2000 04:40:43 -0500 Date: Mon, 30 Oct 2000 11:50:24 +0100 (CET) From: Ingo Molnar Reply-To: mingo@elte.hu To: "Jeff V. Merkey" Cc: linux-kernel@vger.kernel.org Subject: Re: 2.2.18Pre Lan Performance Rocks! In-Reply-To: <20001030022024.B20023@vger.timpanogas.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 30 Oct 2000, Jeff V. Merkey wrote: > ds: and es: are both used in copy-to-user and copy-from-user and they > get reloaded. And they all share the same segment descriptor. Whats your point? ES is the default target segment for string operations. DS is the default data segment. Have you ever profiled how many cycles it takes to do a "mov __KERNEL_DS, %es" in entry.S, before making your (ridiculous) claim? I have. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/