Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750847AbVJFMgz (ORCPT ); Thu, 6 Oct 2005 08:36:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750848AbVJFMgz (ORCPT ); Thu, 6 Oct 2005 08:36:55 -0400 Received: from fmr16.intel.com ([192.55.52.70]:58284 "EHLO fmsfmr006.fm.intel.com") by vger.kernel.org with ESMTP id S1750845AbVJFMgz convert rfc822-to-8bit (ORCPT ); Thu, 6 Oct 2005 08:36:55 -0400 X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Subject: RE: PAE causing failure to run various executables. Date: Thu, 6 Oct 2005 05:36:35 -0700 Message-ID: <88056F38E9E48644A0F562A38C64FB6005EE9110@scsmsx403.amr.corp.intel.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: PAE causing failure to run various executables. Thread-Index: AcXJ9K4UZpCWwflGQcept2jCd165EAAfU84g From: "Pallipadi, Venkatesh" To: "avi" , "Dave Jones" Cc: X-OriginalArrivalTime: 06 Oct 2005 12:36:36.0422 (UTC) FILETIME=[97594660:01C5CA72] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1772 Lines: 60 >-----Original Message----- >From: linux-kernel-owner@vger.kernel.org >[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of avi >Sent: Wednesday, October 05, 2005 2:32 PM >To: Dave Jones >Cc: linux-kernel@vger.kernel.org >Subject: Re: PAE causing failure to run various executables. > >Dave Jones wrote: > >>A fedora user recently filed a puzzling bug at >>https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169741 >> >>The system being reported has exactly 4GB, and its E820 >>tables seem to concur that there is in fact 4GB. >> >>When run in non-PAE mode, it triggers the >>"Warning only 4GB will be used. Use a PAE enabled kernel." >>message, which is odd, but the system does actually run. >> >>When run in PAE mode, it seems to lose its mind, and it >>fails to run various binaries. >> >>Booting with mem=4G causes the machine to boot fine >>(though for some reason, it finds only 3042M of RAM). >> >> >> >looks like a 1GB hole. Yes. E820 map here indeed shows 1GB of memory at higher than 32 bits range. > >>The reporter of this bug has tested on 2.6.14-rc3-git4, and found the >>same issue exists as he saw on the original FC3 kernel, thus >ruling out >>any Fedora-specific patches. >> >>Anyone have any ideas what's wrong here? >> >> >> >maybe the last 1GB is bad. since it can only be accessed by pae, only >the pae kernel fails. > Another possible reason can be NX(Execute Disable) support, which is active only on a PAE kernel. Trying "noexec=off" on a PAE kernel can be tried here. Thanks, Venki - 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/