From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261206AbVFJUTY (ORCPT ); Fri, 10 Jun 2005 16:19:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261207AbVFJUTY (ORCPT ); Fri, 10 Jun 2005 16:19:24 -0400 Received: from hermine.aitel.hist.no ([158.38.50.15]:15621 "HELO hermine.aitel.hist.no") by vger.kernel.org with SMTP id S261206AbVFJUTV (ORCPT ); Fri, 10 Jun 2005 16:19:21 -0400 Date: Fri, 10 Jun 2005 22:25:15 +0200 To: Takashi Ikebe Cc: Andrew Morton , axboe@suse.de, andrea@suse.de, linux-kernel@vger.kernel.org Subject: Re: Real-time problem due to IO congestion. Message-ID: <20050610202515.GA21733@hh.idb.hist.no> References: <42A91D36.8090506@lab.ntt.co.jp> <20050609234231.42a10763.akpm@osdl.org> <42A93D85.4060005@lab.ntt.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42A93D85.4060005@lab.ntt.co.jp> User-Agent: Mutt/1.5.9i From: Helge Hafting Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 10, 2005 at 04:13:09PM +0900, Takashi Ikebe wrote: > > I see. > The program which I tested is just sample, and I wanted to know the > phenomena is spec or bug. > I also understand that this problem is spec, and need to apply some > buffering to such applications. > There is an alternative. Get a separate disk just for the RT-job. You can then run your very heavy IO on other disks, the RT disk won't be delayed by that. Helge Hafting