Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751003AbWAJOJ7 (ORCPT ); Tue, 10 Jan 2006 09:09:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932075AbWAJOJ7 (ORCPT ); Tue, 10 Jan 2006 09:09:59 -0500 Received: from mx2.suse.de ([195.135.220.15]:25572 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S1751003AbWAJOJ6 (ORCPT ); Tue, 10 Jan 2006 09:09:58 -0500 Message-ID: <43C3C023.9040308@suse.de> Date: Tue, 10 Jan 2006 15:09:39 +0100 From: Gerd Hoffmann User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050715) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Jens Axboe Cc: Mikael Pettersson , linux-kernel@vger.kernel.org, Andrew Morton , Linus Torvalds Subject: Re: 2G memory split References: <20060110125852.GA3389@suse.de> <17347.47882.735057.154898@alkaid.it.uu.se> <20060110135404.GF3389@suse.de> In-Reply-To: <20060110135404.GF3389@suse.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 922 Lines: 25 Hi, > 0xb0000000 is a much better default, but I didn't think that would fly > as a patch. I think that will not fly with CONFIG_X86_PAE. In PAE mode the 3rd pmd (for the 0xc0000000 => 0xffffffff kernel address range) is shared, anything but 0xc000000 most likely needs some more hackery than just changing PAGE_OFFSET. As the whole point of this split patchery is to avoid highmem in the first place it maybe makes sense to have some "optimize for 1/2/4/more GB main memory" config option which in turn picks sane PAGE_OFFSET+HIGHMEM+PAE settings? cheers, Gerd -- Gerd 'just married' Hoffmann I'm the hacker formerly known as Gerd Knorr. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/