From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 30 May 2001 10:12:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 30 May 2001 10:12:01 -0400 Received: from ns.virtualhost.dk ([195.184.98.160]:2322 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id ; Wed, 30 May 2001 10:11:57 -0400 Date: Wed, 30 May 2001 16:06:53 +0200 From: Jens Axboe To: andrea@e-mind.com Cc: Jens Axboe , Mark Hemment , Linux Kernel , riel@conectiva.com.br Subject: Re: [patch] 4GB I/O, cut three Message-ID: <20010530160653.G17136@suse.de> In-Reply-To: <20010529160704.N26871@suse.de> <20010530115538.B15089@suse.de> <20010530160008.C1408@athlon.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20010530160008.C1408@athlon.random>; from andrea@suse.de on Wed, May 30, 2001 at 04:00:08PM +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 30 2001, Andrea Arcangeli wrote: > > > I did change the patch so that bounce-pages always come from the NORMAL > > > zone, hence the ZONE_DMA32 zone isn't needed. I avoided the new zone, as > > > I'm not 100% sure the VM is capable of keeping the zones it already has > > > balanced - and adding another one might break the camels back. But as the > > > test box has 4GB, it wasn't bouncing anyway. > > > > You are right, this is definitely something that needs checking. I > > really want this to work though. Rik, Andrea? Will the balancing handle > > the extra zone? > > The bounces can came from the ZONE_NORMAL without problems, however the Of course > ZONE_DMA32 way is fine too, but yes probably it isn't needed in real > life unless you do an huge amount of I/O at the same time. If you want It's not strictly needed, but it does buy us 3 extra gig to do I/O from an a pae enabled x86. > to reduce the amount of changes you can defer the zone_dma32 patch and > possibly plug it in later. Yes, I did modular patches for this reason. Thanks! -- Jens Axboe