Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965577AbWIRIbY (ORCPT ); Mon, 18 Sep 2006 04:31:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965578AbWIRIbY (ORCPT ); Mon, 18 Sep 2006 04:31:24 -0400 Received: from ns1.suse.de ([195.135.220.2]:48349 "EHLO mx1.suse.de") by vger.kernel.org with ESMTP id S965577AbWIRIbX (ORCPT ); Mon, 18 Sep 2006 04:31:23 -0400 To: Rik van Riel Cc: linux-kernel , yogyas@gmail.com Subject: Re: How much kernel memory is in 64-bit OS ? References: <450DE3DE.50301@redhat.com> From: Andi Kleen Date: 18 Sep 2006 10:31:21 +0200 In-Reply-To: <450DE3DE.50301@redhat.com> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 675 Lines: 14 Rik van Riel writes: > > However, all 64 bit architectures have one thing in common. > There is so much address space available for both kernel and > userspace that we won't have to worry about a shortage for a > very long time. Nearly. The x86-64 port started off with a 512GB user space VM limit, and then that later was extended with 4 level page tables because it wasn't quite enough for everybody. -Andi - 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/