From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with SMTP id AEEBD5F0019 for ; Wed, 3 Jun 2009 13:16:16 -0400 (EDT) Received: by pzk5 with SMTP id 5so155432pzk.12 for ; Wed, 03 Jun 2009 10:16:15 -0700 (PDT) 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 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org 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 List-ID: 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org