Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755342AbZFCRQW (ORCPT ); Wed, 3 Jun 2009 13:16:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754295AbZFCRQP (ORCPT ); Wed, 3 Jun 2009 13:16:15 -0400 Received: from mail-pz0-f177.google.com ([209.85.222.177]:58336 "EHLO mail-pz0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753885AbZFCRQO (ORCPT ); Wed, 3 Jun 2009 13:16:14 -0400 MIME-Version: 1.0 In-Reply-To: References: <20090530192829.GK6535@oblivion.subreption.com> <20090531022158.GA9033@oblivion.subreption.com> <20090602203405.GC6701@oblivion.subreption.com> <1244041914.12272.64.camel@localhost.localdomain> <20090603162831.GF6701@oblivion.subreption.com> <4A26A689.1090300@redhat.com> Date: Wed, 3 Jun 2009 13:16:14 -0400 Message-ID: <7e0fb38c0906031016m77416390v37fb0673e6e50501@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: 1075 Lines: 24 On Wed, Jun 3, 2009 at 12:47 PM, Linus Torvalds wrote: > The other mistake is to think that SELinux is sane, or should be the > default. It's a f*cking complex disaster, and makes performance plummet on > some things. While I think you couldn't be more wrong I'm not going to argue that topic.... I am at least interested in hearing about the 'performance plummet.' I don't see any performance reports on my todo list but I am interested in banging on any that people report. Last performance thing I heard anything about was Ingo doing some profiling of of a network stack benchmark in which SELinux was eating a percent or two his time. I cut the SELinux performance penalty by about 50% on my systems in that benchmark. If others have complaints let me or the selinux list know.... -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/