Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757950AbZFCRcG (ORCPT ); Wed, 3 Jun 2009 13:32:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756188AbZFCRbz (ORCPT ); Wed, 3 Jun 2009 13:31:55 -0400 Received: from rv-out-0506.google.com ([209.85.198.225]:18381 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756017AbZFCRbz (ORCPT ); Wed, 3 Jun 2009 13:31:55 -0400 MIME-Version: 1.0 In-Reply-To: References: <20090530192829.GK6535@oblivion.subreption.com> <20090602203405.GC6701@oblivion.subreption.com> <1244041914.12272.64.camel@localhost.localdomain> <20090603162831.GF6701@oblivion.subreption.com> <4A26A689.1090300@redhat.com> <7e0fb38c0906031016m77416390v37fb0673e6e50501@mail.gmail.com> Date: Wed, 3 Jun 2009 13:31:56 -0400 Message-ID: <7e0fb38c0906031031t551f566fxc4ff2f08a73f807f@mail.gmail.com> Subject: Re: Security fix for remapping of page 0 (was [PATCH] Change ZERO_SIZE_PTR to point at unmapped space) From: Eric Paris To: Linus Torvalds Cc: Rik van Riel , "Larry H." , Christoph Lameter , Stephen Smalley , linux-mm@kvack.org, Alan Cox , linux-kernel@vger.kernel.org, pageexec@freemail.hu Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 921 Lines: 26 On Wed, Jun 3, 2009 at 1:28 PM, Linus Torvalds wrote: > > > On Wed, 3 Jun 2009, Eric Paris wrote: >> >> I am at least interested in hearing about the 'performance plummet.' > > It's perhaps not so much SElinux itself, but the AUDIT support (which it > requires) that is really _very_ noticeable on microbenchmarks. > > Last time I ran lmbench on a Fedora kernel it was horrible. Turning off > AUDIT (which also turns off SElinux) fixes it. > > It may be crazy distro auditing rules or whatever, but that doesn't change > the basic issue. Probably AUDITSYSCALL, not AUDIT. SELinux only needs AUDIT. I'll poke that too someday, thanks. -Eric -- 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/