From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 19 Sep 2002 22:06:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 19 Sep 2002 22:06:30 -0400 Received: from pizda.ninka.net ([216.101.162.242]:3737 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Thu, 19 Sep 2002 22:06:29 -0400 Date: Thu, 19 Sep 2002 19:01:54 -0700 (PDT) Message-Id: <20020919.190154.57630807.davem@redhat.com> To: ak@suse.de Cc: akpm@digeo.com, taka@valinux.co.jp, alan@lxorguk.ukuu.org.uk, neilb@cse.unsw.edu.au, linux-kernel@vger.kernel.org, nfs@lists.sourceforge.net Subject: Re: [NFS] Re: [PATCH] zerocopy NFS for 2.5.36 From: "David S. Miller" In-Reply-To: <20020920040619.A30304@wotan.suse.de> References: <20020920032346.A22949@wotan.suse.de> <20020919.182739.48496975.davem@redhat.com> <20020920040619.A30304@wotan.suse.de> X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) 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 From: Andi Kleen Date: Fri, 20 Sep 2002 04:06:19 +0200 > See "montdq/movnti", the latter of which even works on register > registers. Ben LaHaise pointed this out to me earlier today. The issue is that you really want to do prefetching in these loops (waiting for the hardware prefetch is too slow because it needs several cache misses to trigger) so for cache hints on reading only prefetch instructions are interesting. I'm talking about using this to bypass the cache on the stores. The prefetches are a seperate issue and I agree with you on that.