From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261511AbVFJHy6 (ORCPT ); Fri, 10 Jun 2005 03:54:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262512AbVFJHy6 (ORCPT ); Fri, 10 Jun 2005 03:54:58 -0400 Received: from tama5.ecl.ntt.co.jp ([129.60.39.102]:55027 "EHLO tama5.ecl.ntt.co.jp") by vger.kernel.org with ESMTP id S261511AbVFJHyz (ORCPT ); Fri, 10 Jun 2005 03:54:55 -0400 Message-ID: <42A94611.8070502@lab.ntt.co.jp> Date: Fri, 10 Jun 2005 16:49:37 +0900 From: Takashi Ikebe User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050317) X-Accept-Language: ja, en-us, en MIME-Version: 1.0 To: Jens Axboe CC: andrea@suse.de, Linux Kernel Mailing List Subject: Re: Real-time problem due to IO congestion. References: <42A91D36.8090506@lab.ntt.co.jp> <20050610062452.GK5140@suse.de> In-Reply-To: <20050610062452.GK5140@suse.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jens Axboe wrote: > On Fri, Jun 10 2005, Takashi Ikebe wrote: > > This basically needs io priorities to work, so that request allocation > is prioritized as well. I didn't actually add request allocation groups > in the cfq-ts posted with priority support, however I have some patches > from years ago that did so. I'll see if I can find the time to brush > those off. > As you and andrew said, basically application based approach seems reasonable, but I'm so interesting your patch, if you have time, please show me :-) Thank you. -- Takashi Ikebe