From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx184.postini.com [74.125.245.184]) by kanga.kvack.org (Postfix) with SMTP id CBA6B6B0002 for ; Sun, 10 Feb 2013 14:09:23 -0500 (EST) Date: Sun, 10 Feb 2013 20:09:21 +0100 From: Pavel Machek Subject: Re: PAE problems was [RFC] Reproducible OOM with just a few sleeps Message-ID: <20130210190921.GA18384@amd.pavel.ucw.cz> References: <201302010313.r113DTj3027195@como.maths.usyd.edu.au> <510B46C3.5040505@turmel.org> <20130201102044.GA2801@amd.pavel.ucw.cz> <20130201102545.GA3053@amd.pavel.ucw.cz> <5112F518.3020003@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5112F518.3020003@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Dave Hansen Cc: Phil Turmel , "H. Peter Anvin" , paul.szabo@sydney.edu.au, ben@decadent.org.uk, linux-kernel@vger.kernel.org, linux-mm@kvack.org On Wed 2013-02-06 16:28:08, Dave Hansen wrote: > On 02/01/2013 02:25 AM, Pavel Machek wrote: > > Ouch, and... IIRC (hpa should know for sure), PAE is neccessary for > > R^X support on x86, thus getting more common, not less. If it does not > > work, that's bad news. > > Dare I ask what "R^X" is? Read xor Execute, aka NX.... support for executable but not readable pages. Usefull for making exploits harder iirc. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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