Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 20 Jan 2002 16:42:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 20 Jan 2002 16:42:31 -0500 Received: from pc1-camc5-0-cust78.cam.cable.ntl.com ([80.4.0.78]:51364 "EHLO amadeus.home.nl") by vger.kernel.org with ESMTP id ; Sun, 20 Jan 2002 16:42:16 -0500 Message-Id: Date: Sun, 20 Jan 2002 21:42:04 +0000 (GMT) From: arjan@fenrus.demon.nl To: ak@suse.de (Andi Kleen) Subject: Re: performance of O_DIRECT on md/lvm cc: linux-kernel@vger.kernel.org In-Reply-To: X-Newsgroups: fenrus.linux.kernel User-Agent: tin/1.5.8-20010221 ("Blue Water") (UNIX) (Linux/2.4.3-6.0.1 (i586)) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org In article you wrote: > I think an optional readahead mode for O_DIRECT would be useful. I disagree. O_DIRECT says "do not cache. period. I know what I'm doing" and the kernel should respect that imho. After all we have sys_readahead for the other part... - 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/