From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262694AbULPPeg (ORCPT ); Thu, 16 Dec 2004 10:34:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262709AbULPPeg (ORCPT ); Thu, 16 Dec 2004 10:34:36 -0500 Received: from ns.virtualhost.dk ([195.184.98.160]:51104 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S262694AbULPPeS (ORCPT ); Thu, 16 Dec 2004 10:34:18 -0500 Date: Thu, 16 Dec 2004 16:34:16 +0100 From: Jens Axboe To: Linux Kernel Subject: [PATCH] Time sliced cfq ver17 Message-ID: <20041216153416.GC23414@suse.de> References: <20041215082004.GO3157@suse.de> <20041215120323.GT3157@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041215120323.GT3157@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, 2.6.10-rc3-mm1 patch: http://www.kernel.org/pub/linux/kernel/people/axboe/patches/v2.6/2.6.10-rc3-mm1/cfq-time-slices-17-2.6.10-rc3-mm1.gz 2.6-BK patch: http://www.kernel.org/pub/linux/kernel/people/axboe/patches/v2.6/2.6.10-rc3/cfq-time-slices-17.gz Changes: - Kill the spare queue logic - wait_request should not imply that queue must be allowed to allocate a request, otherwise a write could quickly flood the queue. Add must_alloc to handle that and make it one-shot. - Turn on/off idle window based on process think time and seek time. Improve idle timer logic. The seek/think time updates toggle the idle_window flag and increase queuing depth if we disable the idle window. - Improve SCSI requeing logic. Add request fully back into cfq queue but mark it as next service once this queue gets slice time again. - More preemption fixes. Allow new sync io to preempt equal priority async io to improve reader fairness. -- Jens Axboe