From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267186AbTGOLKP (ORCPT ); Tue, 15 Jul 2003 07:10:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267190AbTGOLKP (ORCPT ); Tue, 15 Jul 2003 07:10:15 -0400 Received: from pc2-cwma1-4-cust86.swan.cable.ntl.com ([213.105.254.86]:50373 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S267186AbTGOLKN (ORCPT ); Tue, 15 Jul 2003 07:10:13 -0400 Subject: Re: RFC on io-stalls patch From: Alan Cox To: Jens Axboe Cc: Andrea Arcangeli , Marcelo Tosatti , Chris Mason , lkml , "Stephen C. Tweedie" , Jeff Garzik , Andrew Morton , Alexander Viro In-Reply-To: <20030715052640.GY833@suse.de> References: <1057932804.13313.58.camel@tiny.suse.com> <20030712073710.GK843@suse.de> <1058034751.13318.95.camel@tiny.suse.com> <20030713090116.GU843@suse.de> <20030713191921.GI16313@dualathlon.random> <20030714054918.GD843@suse.de> <20030714131206.GJ833@suse.de> <20030714195138.GX833@suse.de> <20030714201637.GQ16313@dualathlon.random> <20030715052640.GY833@suse.de> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Message-Id: <1058268126.3857.25.camel@dhcp22.swansea.linux.org.uk> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-5) Date: 15 Jul 2003 12:22:07 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Maw, 2003-07-15 at 06:26, Jens Axboe wrote: > Sorry, but I think that is nonsense. This is the way we have always > worked. You just have to maintain a decent queue length still (like we > always have in 2.4) and there are no problems. The memory pinning problem is still real - and always has been. It shows up best not on IDE disks but large slow media like magneto opticals where you can queue lots of I/O but you get 500K/second