From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 0E5B51381F3 for ; Tue, 8 Oct 2013 17:04:23 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 0C8B2E0ACD; Tue, 8 Oct 2013 17:04:15 +0000 (UTC) Received: from mail-pb0-f46.google.com (mail-pb0-f46.google.com [209.85.160.46]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 0185EE08BD for ; Tue, 8 Oct 2013 17:04:13 +0000 (UTC) Received: by mail-pb0-f46.google.com with SMTP id rq2so8863473pbb.5 for ; Tue, 08 Oct 2013 10:04:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=/+lUxS03fiHf9Upg8IjEMHVWqE4w3yv36XzZDwlRNqE=; b=rSDPxrlhCNRjRGe3hso060o+ZCPINgyoXwg39BoG97+mj8qqaPTj6Q1Dbl99lZJVQn MJMscs1xv8bhnXnb7icWD6+4Hfs/yHvAaQbvAM6tL7/Dt7NMlon8GjCTdAj6FY8Z/xsB M8tD9D+5VONq38xZt6U8BTGlmsCke7g4TsG6ErVkO/YuUdrQHUizpt3r4q+lLjH+uiQh /oaNblxMBL/0efFtd9NjzInmjzxtlBAaNHxFfTuadclHsx55ND3a29xEo/J089oqwzzT JJocUFyrfj90L3bfQ15m6cLEBuSFGA0FU0jKU+XPVLLQZp5t2/tricF7MH8pUjmoc3cO M86w== X-Received: by 10.69.4.100 with SMTP id cd4mr3145442pbd.120.1381251852815; Tue, 08 Oct 2013 10:04:12 -0700 (PDT) Received: from [192.168.1.5] (213-154-212-42.static.vega-ua.net. [213.154.212.42]) by mx.google.com with ESMTPSA id dk3sm41211494pbc.32.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 08 Oct 2013 10:04:12 -0700 (PDT) Message-ID: <52543B10.10201@gmail.com> Date: Tue, 08 Oct 2013 20:04:16 +0300 From: Alexander Kapshuk User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org CC: Alan McKinnon Subject: Re: [gentoo-user] re: NX (Execute Disable) protection cannot be enabled: non-PAE kernel! [dmesg] References: <52530B6D.5080707@gmail.com> <52530E8C.1040701@gmail.com> In-Reply-To: <52530E8C.1040701@gmail.com> X-Enigmail-Version: 1.5.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Archives-Salt: d619d81a-260f-4596-a8dc-64461fc9512b X-Archives-Hash: f553f638b0317121e3aa0d62d50915fa On 10/07/2013 10:42 PM, Alan McKinnon wrote: > On 07/10/2013 21:28, Alexander Kapshuk wrote: >> Is the message below I should do something about? >> >> box0=; dmesg|grep -i PAE >> [ 0.000000] Notice: NX (Execute Disable) protection cannot be >> enabled: non-PAE kernel! >> >> >> My CPU seems to have support for it. >> box0=; grep pae /proc/cpuinfo >> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca >> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm >> constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl >> est tm2 ssse3 cx16 xtpr pdcm lahf_lm dtherm >> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca >> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm >> constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl >> est tm2 ssse3 cx16 xtpr pdcm lahf_lm dtherm >> >> But not my kernel, as far as I can tell. >> box0=; uname -a >> Linux box0 3.10.7-gentoo-r1 #1 SMP Sat Oct 5 23:57:58 EEST 2013 i686 >> Intel(R) Pentium(R) Dual CPU T3400 @ 2.16GHz GenuineIntel GNU/Linux >> >> box0=; grep -i pae .config >> box0=; echo $? >> 1 >> >> Thanks. >> >> > > Symbol: ARM_LPAE [=ARM_LPAE] > Type : unknown > > Symbol: X86_PAE [=n] > Type : boolean > Prompt: PAE (Physical Address Extension) Support > Location: > (1) -> Processor type and features > Defined at arch/x86/Kconfig:1213 > Depends on: X86_32 [=n] && !HIGHMEM4G [=n] > Selected by: HIGHMEM64G [=n] && && !M486 [=n] > > Thanks. I did a little research into the whole PAE business, as obviously my knowledge of the matter in question was limited. If I understood it correctly, PAE is a method that allows 32-bit kernels access 4 or more Gb of RAM, which is normally the domain of 64-bit kernels. Seeing I've got 3 Gb of RAM, I arrived at the conclusion I don't need PAE enabled, do I? box0=; sed 1q /proc/meminfo MemTotal: 3107668 kB Thanks.