Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262288AbTI0XuW (ORCPT ); Sat, 27 Sep 2003 19:50:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262290AbTI0XuW (ORCPT ); Sat, 27 Sep 2003 19:50:22 -0400 Received: from pizda.ninka.net ([216.101.162.242]:54169 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id S262288AbTI0XuT (ORCPT ); Sat, 27 Sep 2003 19:50:19 -0400 Date: Sat, 27 Sep 2003 16:36:35 -0700 From: "David S. Miller" To: Andi Kleen Cc: davidm@napali.hpl.hp.com, ak@muc.de, linux-kernel@vger.kernel.org Subject: Re: NS83820 2.6.0-test5 driver seems unstable on IA64 Message-Id: <20030927163635.65a0088a.davem@redhat.com> In-Reply-To: References: X-Mailer: Sylpheed version 0.9.2 (GTK+ 1.2.6; sparc-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 27 Sep 2003 06:26:40 +0200 Andi Kleen wrote: > You handle misalignment->misalignment copies with zero or small cost - > when both source and destination have the same misalignment. I guess > you do that by just aligning the pointer at the beginning of the > function. That works as long as both source and destination have > the same misalignment. Nope, different alignments are fully optimized as well. Sparc64 VIS has special instructions so that you can handle all of these different src/dst alignment cases and still use the 64-byte-at-a-time cache bypassing loads and stores. - 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/