From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754991Ab3AKQEn (ORCPT ); Fri, 11 Jan 2013 11:04:43 -0500 Received: from e7.ny.us.ibm.com ([32.97.182.137]:35421 "EHLO e7.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753719Ab3AKQEm (ORCPT ); Fri, 11 Jan 2013 11:04:42 -0500 Message-ID: <50F037F2.8040301@linux.vnet.ibm.com> Date: Fri, 11 Jan 2013 08:04:02 -0800 From: Dave Hansen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: paul.szabo@sydney.edu.au CC: 695182@bugs.debian.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC] Reproducible OOM with partial workaround References: <201301110146.r0B1kF4T032208@como.maths.usyd.edu.au> In-Reply-To: <201301110146.r0B1kF4T032208@como.maths.usyd.edu.au> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13011116-5806-0000-0000-00001E1D1AE2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/10/2013 05:46 PM, paul.szabo@sydney.edu.au wrote: >> > ... I don't believe 64GB of RAM has _ever_ been booted on a 32-bit >> > kernel without either violating the ABI (3GB/1GB split) or doing >> > something that never got merged upstream ... > Sorry to be so contradictory: > > psz@como:~$ uname -a > Linux como.maths.usyd.edu.au 3.2.32-pk06.10-t01-i386 #1 SMP Sat Jan 5 18:34:25 EST 2013 i686 GNU/Linux > psz@como:~$ free -l > total used free shared buffers cached > Mem: 64446900 4729292 59717608 0 15972 480520 > Low: 375836 304400 71436 > High: 64071064 4424892 59646172 > -/+ buffers/cache: 4232800 60214100 > Swap: 134217724 0 134217724 Hey, that's pretty cool! I would swear that the mem_map[] overhead was such that they wouldn't boot, but perhaps those brain cells died on me.