From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 18 Sep 2002 11:59:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 18 Sep 2002 11:59:46 -0400 Received: from to-velocet.redhat.com ([216.138.202.10]:36597 "EHLO touchme.toronto.redhat.com") by vger.kernel.org with ESMTP id ; Wed, 18 Sep 2002 11:59:45 -0400 Date: Wed, 18 Sep 2002 12:04:47 -0400 From: Benjamin LaHaise To: Badari Pulavarty Cc: linux-kernel@vger.kernel.org, linux-aio@kvack.org Subject: Re: [RFC] [PATCH] 2.5.35 patch for making DIO async Message-ID: <20020918120447.F6398@redhat.com> References: <20020918075103.B6143@redhat.com> <200209181558.g8IFwNp14249@eng2.beaverton.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <200209181558.g8IFwNp14249@eng2.beaverton.ibm.com>; from pbadari@us.ibm.com on Wed, Sep 18, 2002 at 08:58:22AM -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 18, 2002 at 08:58:22AM -0700, Badari Pulavarty wrote: > Thanks for looking at the patch. Patch needed few cleanups to get it > working. Here is the status so far.. > > 1) I tested synchronous raw read/write. They perform almost same as > without this patch. I am looking at why I can't match the performance. > (I get 380MB/sec on 40 dd's on 40 disks without this patch. > I get 350MB/sec with this patch). Hmm, we should try to improve that. Have you tried profiling a long run? > 2) wait_on_sync_kiocb() needed blk_run_queues() to make regular read/ > write perform well. That should be somewhat conditional, but for now it sounds like the right thing to do. > 3) I am testing aio read/writes. I am using libaio.0.3.92. > When I try aio_read/aio_write on raw device, I am get OOPS. > Can I use libaio.0.3.92 on 2.5 ? Are there any interface > changes I need to worry between 2.4 and 2.5 ? libaio 0.3.92 should work on 2.5. Could you send me a copy of the decoded Oops? -ben -- GMS rules.