From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 16 Nov 2002 12:36:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 16 Nov 2002 12:36:24 -0500 Received: from mailout07.sul.t-online.com ([194.25.134.83]:30393 "EHLO mailout07.sul.t-online.com") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Sat, 16 Nov 2002 12:36:23 -0500 Content-Type: text/plain; charset=US-ASCII From: Marc-Christian Petersen Organization: WOLK - Working Overloaded Linux Kernel To: Andrea Arcangeli Subject: Re: 2.[45] fixes for design locking bug in wait_on_page/wait_on_buffer/get_request_wait Date: Sat, 16 Nov 2002 18:43:36 +0100 User-Agent: KMail/1.4.3 Cc: linux-kernel@vger.kernel.org, Con Kolivas References: <200211161657.51357.m.c.p@wolk-project.de> <200211161810.23039.m.c.p@wolk-project.de> <20021116173224.GG31697@dualathlon.random> In-Reply-To: <20021116173224.GG31697@dualathlon.random> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: <200211161841.59889.m.c.p@wolk-project.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 16 November 2002 18:32, Andrea Arcangeli wrote: Hi Andrea, > you may want to try with this setting that helps with very slow devices: > echo 2 500 0 0 500 3000 3 1 0 > /proc/sys/vm/bdflush > > or also with my current default tuned for high performance: > echo 50 500 0 0 500 3000 60 20 > /proc/sys/vm/bdflush I've tested both without any changes, "pausings" are still there. > you may have too many dirty buffers around and you end running at disk > speed at every memory allocation, the first setting will decrease the > amount of dirty buffers dramatically, if you still have significant > slowdown with the first setting above, it's most probably only the usual > elevator issue. Seems so. So I have to use 2.4.18 until there is a real proper fix for that. ciao, Marc