From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from dax.scot.redhat.com (sct@dax.scot.redhat.com [195.89.149.242]) by kvack.org (8.8.7/8.8.7) with ESMTP id GAA15633 for ; Mon, 8 Feb 1999 06:22:36 -0500 Date: Mon, 8 Feb 1999 11:22:15 GMT Message-Id: <199902081122.LAA02263@dax.scot.redhat.com> From: "Stephen C. Tweedie" MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Subject: Re: Large memory system In-Reply-To: <19990130083631.B9427@msc.cornell.edu> References: <19990130083631.B9427@msc.cornell.edu> Sender: owner-linux-mm@kvack.org To: Daniel Blakeley Cc: linux-mm@kvack.org, Stephen Tweedie List-ID: Hi, On Sat, 30 Jan 1999 08:36:31 -0500, Daniel Blakeley said: > I've jumped the gun a little bit and recommended a Professor buy 4GB > of RAM on a Xeon machine to run Linux on and he did. After he got it > I read the large memory howto which states that the max memory size > for Linux 2.2.x is 2GB physical/2GB virtual. The memory size seems to > limited by the 32bit nature of the x86 architecture. The Xeon seems > to have a 36bit memory addressing mode. Can Linux be easily expanded > to use the 36bit addressing? It's not exactly trivial, but it can (and will) be done. For now, you can only use 4G on a 64-bit architecture (Alpha or Sparc64), but basically we know how to address it on Intel too, transparently to the user. --Stephen -- To unsubscribe, send a message with 'unsubscribe linux-mm my@address' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://humbolt.geo.uu.nl/Linux-MM/