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 07:46:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 18 Sep 2002 07:46:03 -0400 Received: from to-velocet.redhat.com ([216.138.202.10]:19950 "EHLO touchme.toronto.redhat.com") by vger.kernel.org with ESMTP id ; Wed, 18 Sep 2002 07:46:02 -0400 Date: Wed, 18 Sep 2002 07:51:03 -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: <20020918075103.B6143@redhat.com> References: <200209172103.g8HL33N15574@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: <200209172103.g8HL33N15574@eng2.beaverton.ibm.com>; from pbadari@us.ibm.com on Tue, Sep 17, 2002 at 02:03:02PM -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 17, 2002 at 02:03:02PM -0700, Badari Pulavarty wrote: > Hi Ben, > > Here is a 2.5.35 patch to make DIO async. Basically, DIO does not > wait for io completion. Waiting will be done at the higher level > (same way generic_file_read does). This looks pretty good. Andrew Morton has had a look over it too and agrees that it should go in after a bit of testing. Does someone want to try comparing throughput of dio based aio vs normal read/write? It would be interesting to see what kind of an effect pipelining aios makes and if there are any performance niggles we need to squash. Cheer, -ben