From owner-freebsd-hackers Fri Jul 5 4:35:37 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A7D3E37B400 for ; Fri, 5 Jul 2002 04:35:34 -0700 (PDT) Received: from mailout.informatik.tu-muenchen.de (mailout.informatik.tu-muenchen.de [131.159.0.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id DD2E443E4A for ; Fri, 5 Jul 2002 04:35:33 -0700 (PDT) (envelope-from langd@informatik.tu-muenchen.de) Received: from mailrelay2.informatik.tu-muenchen.de (mailrelay.informatik.tu-muenchen.de [131.159.2.33]) by mailout.informatik.tu-muenchen.de (Postfix) with ESMTP id DBCE1615E for ; Fri, 5 Jul 2002 13:35:32 +0200 (MEST) Received: from atrbg11.informatik.tu-muenchen.de (atrbg11.informatik.tu-muenchen.de [131.159.24.91]) by mailrelay2.informatik.tu-muenchen.de (Postfix) with ESMTP id C26C747384 for ; Fri, 5 Jul 2002 13:35:32 +0200 (MEST) Received: by atrbg11.informatik.tu-muenchen.de (Postfix, from userid 20455) id 74F2713678; Fri, 5 Jul 2002 13:35:32 +0200 (CEST) Date: Fri, 5 Jul 2002 13:35:32 +0200 From: Daniel Lang To: freebsd-hackers@freebsd.org Subject: Swap configuration for 2GB phys RAM Message-ID: <20020705113532.GA11273@atrbg11.informatik.tu-muenchen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.27i X-Geek: GCS/CC d-- s: a- C++$ UBS++++$ P+++$ L- E-(---) W+++(--) N++ o K w--- O? M? V? PS+(++) PE--(+) Y+ PGP+ t++ 5+++ X R+(-) tv+ b+ DI++ D++ G++ e+++ h---(-) r++>+++ y+ Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi, I'm posting this to -hackers, since there was a related thread just recently. If this is unappropriate and would belong to -questions, please accept my apologies. We've just bought a Dell PowerEdge 2650 with Dual Xeons and 2 GB of RAM. I thought I would just install it the usual way, which would include reserving 4 GB swap. Now I'm not sure if I would run into problems, as this would match the entire address space. There has been a recent thread about someone who ran into possible problems because of that. I wonder what I could do to prevent any problems. Is is advisable to increase the kernel address space (KVA is this?) in my custom kernel? I've found in the handbook (could also be the FAQ) a paragraph that stated, if the hardware (MMU) would support it, FreeBSD could address 8 TB of (I guess virtual) memory. The poweredge can even be equipped with 6 GB RAM, which is already past the 4GB limit of a standard 32bit address space. So I wonder if it would be possible to just use the memory as usual? I don't know of the Xeon's have a different MMU which enables to address more than 4 GB, but from my guts I would doubt it. It seems that some people have machines like this in production. So any hints or advice would be appreciated. Thanks & best regards, Daniel P.S. Please cc: as I'm not subscribed, but I keep up with the archives, though. -- IRCnet: Mr-Spock - Me transfere sursum, Caledoni - *Daniel Lang * dl@leo.org * +49 89 289 25735 * http://www.leo.org/~dl/* To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message