Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 21 Jan 2002 09:40:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 21 Jan 2002 09:40:30 -0500 Received: from penguin.e-mind.com ([195.223.140.120]:11624 "EHLO penguin.e-mind.com") by vger.kernel.org with ESMTP id ; Mon, 21 Jan 2002 09:40:24 -0500 Date: Mon, 21 Jan 2002 15:41:25 +0100 From: Andrea Arcangeli To: Benjamin LaHaise Cc: Andi Kleen , linux-kernel@vger.kernel.org Subject: Re: performance of O_DIRECT on md/lvm Message-ID: <20020121154125.A8292@athlon.random> In-Reply-To: <200201181743.g0IHhO226012@street-vision.com.suse.lists.linux.kernel> <3C48607C.35D3DDFF@redhat.com.suse.lists.linux.kernel> <20020120201603.L21279@athlon.random.suse.lists.linux.kernel> <20020121021224.O21279@athlon.random> <20020121003552.A12850@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.12i In-Reply-To: <20020121003552.A12850@redhat.com>; from bcrl@redhat.com on Mon, Jan 21, 2002 at 12:35:52AM -0500 X-GnuPG-Key-URL: http://e-mind.com/~andrea/aa.gnupg.asc X-PGP-Key-URL: http://e-mind.com/~andrea/aa.asc Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 21, 2002 at 12:35:52AM -0500, Benjamin LaHaise wrote: > On Mon, Jan 21, 2002 at 02:12:24AM +0100, Andrea Arcangeli wrote: > > yes, in short the API to allow the userspace to keep the I/O pipeline > > full with a ring of user buffers is not available at the moment. > > See http://www.kvack.org/~blah/aio/ . Seems to work pretty nicely > for raw io. of course async-io API is the right fix to keep the I/O pipeline always full. Thanks for pointing it out. Andrea - 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/