Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 17 Dec 2002 19:11:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 17 Dec 2002 19:11:58 -0500 Received: from neon-gw-l3.transmeta.com ([63.209.4.196]:46605 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Tue, 17 Dec 2002 19:11:58 -0500 Date: Tue, 17 Dec 2002 16:20:36 -0800 (PST) From: Linus Torvalds To: Ulrich Drepper cc: "H. Peter Anvin" , Alan Cox , Matti Aarnio , Hugh Dickins , Dave Jones , Ingo Molnar , Linux Kernel Mailing List Subject: Re: Intel P6 vs P7 system call performance In-Reply-To: <3DFF83C5.6000007@redhat.com> 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 Content-Length: 716 Lines: 21 On Tue, 17 Dec 2002, Ulrich Drepper wrote: > > This is why I'd say mkae no distinction at all. Have the first > nr_syscalls * 8 bytes starting at 0xfffff000 as a jump table. No, the way sysenter works, the table approach just sucks up dcache space (the kernel cannot know which sysenter is the one that the user uses anyway, so the jump table would have to just add back some index and we'd be back exactly where we started) I'll keep it the way it is now. Linus - 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/