From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264795AbUG2RNx (ORCPT ); Thu, 29 Jul 2004 13:13:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264299AbUG2RLw (ORCPT ); Thu, 29 Jul 2004 13:11:52 -0400 Received: from holomorphy.com ([207.189.100.168]:27029 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S264791AbUG2RKw (ORCPT ); Thu, 29 Jul 2004 13:10:52 -0400 Date: Thu, 29 Jul 2004 10:10:37 -0700 From: William Lee Irwin III To: Avi Kivity Cc: jmoyer@redhat.com, suparna@in.ibm.com, linux-aio@kvack.org, linux-kernel@vger.kernel.org, linux-osdl@osdl.org Subject: Re: [PATCH 20/22] AIO poll Message-ID: <20040729171037.GS2334@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Avi Kivity , jmoyer@redhat.com, suparna@in.ibm.com, linux-aio@kvack.org, linux-kernel@vger.kernel.org, linux-osdl@osdl.org References: <20040702130030.GA4256@in.ibm.com> <20040702163946.GJ3450@in.ibm.com> <16649.5485.651481.534569@segfault.boston.redhat.com> <41091FAA.6080409@exanet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41091FAA.6080409@exanet.com> User-Agent: Mutt/1.5.6+20040523i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jeff Moyer wrote: >> What are the barriers to getting the AIO poll support into the kernel? I >> think if we have AIO support at all, it makes sense to add this. On Thu, Jul 29, 2004 at 07:02:50PM +0300, Avi Kivity wrote: > I second the motion. I don't see how one can write a server which uses > both networking and block aio without aio poll. I just did it for OLS. The answer is busywait. i.e. 100% cpu. This is because you can't use timeouts unless they're unified. -- wli