From owner-svn-src-head@freebsd.org Sun Jul 26 17:57:37 2015 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A6F859AB25D; Sun, 26 Jul 2015 17:57:37 +0000 (UTC) (envelope-from gjb@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 7CB08E24; Sun, 26 Jul 2015 17:57:37 +0000 (UTC) (envelope-from gjb@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.70]) by repo.freebsd.org (8.14.9/8.14.9) with ESMTP id t6QHvb8l070189; Sun, 26 Jul 2015 17:57:37 GMT (envelope-from gjb@FreeBSD.org) Received: (from gjb@localhost) by repo.freebsd.org (8.14.9/8.14.9/Submit) id t6QHvbt2070188; Sun, 26 Jul 2015 17:57:37 GMT (envelope-from gjb@FreeBSD.org) Message-Id: <201507261757.t6QHvbt2070188@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: gjb set sender to gjb@FreeBSD.org using -f From: Glen Barber Date: Sun, 26 Jul 2015 17:57:37 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r285894 - head/release/doc/en_US.ISO8859-1/relnotes stable/10/release/doc/en_US.ISO8859-1/relnotes X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Jul 2015 17:57:37 -0000 Author: gjb Date: Sun Jul 26 17:57:35 2015 New Revision: 285894 URL: https://svnweb.freebsd.org/changeset/base/285894 Log: Further refine the PAE_TABLES entry, based on feedback from alc. Sponsored by: The FreeBSD Foundation Modified: head/release/doc/en_US.ISO8859-1/relnotes/article.xml Changes in other areas also in this revision: Modified: stable/10/release/doc/en_US.ISO8859-1/relnotes/article.xml Modified: head/release/doc/en_US.ISO8859-1/relnotes/article.xml ============================================================================== --- head/release/doc/en_US.ISO8859-1/relnotes/article.xml Sun Jul 26 16:40:51 2015 (r285893) +++ head/release/doc/en_US.ISO8859-1/relnotes/article.xml Sun Jul 26 17:57:35 2015 (r285894) @@ -803,13 +803,16 @@ The PAE_TABLES kernel configuration option has been added for &os;/&arch.i386;, which instructs &man.pmap.9; - to use PAE format for page tables with - 32-bit physical addresses. Unlike the PAE - option, PAE_TABLES preserves kernel binary - interface (KBI) compatibility with - non-PAE kernels, allowing - non-PAE kernel modules and drivers to work - with a PAE_TABLES-enabled kernel. + to use PAE format for page tables while + maintaining a 32-bit physical address size elsewhere in the + kernel. The use of this option can enhance application-level + security by enabling the creation of no execute + mappings on modern &arch.i386; processors. Unlike the + PAE option, PAE_TABLES + preserves kernel binary interface (KBI) + compatibility with non-PAE kernels, + allowing non-PAE kernel modules and drivers + to work with a PAE_TABLES-enabled kernel. Additionally, system limits are tuned for 4GB maximum RAM, avoiding kernel virtual address space (KVA) exhaustion.