From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755042AbYGVUzT (ORCPT ); Tue, 22 Jul 2008 16:55:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752275AbYGVUzG (ORCPT ); Tue, 22 Jul 2008 16:55:06 -0400 Received: from lucidpixels.com ([75.144.35.66]:60023 "EHLO lucidpixels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751629AbYGVUzF (ORCPT ); Tue, 22 Jul 2008 16:55:05 -0400 Date: Tue, 22 Jul 2008 16:55:03 -0400 (EDT) From: Justin Piszcz To: Peter Zijlstra cc: linux-kernel@vger.kernel.org, Alan Piszcz Subject: Re: 128 GiB memory question-- kernel only sees 64GiB? In-Reply-To: <1216736883.7257.102.camel@twins> Message-ID: References: <1216736883.7257.102.camel@twins> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 22 Jul 2008, Peter Zijlstra wrote: > On Tue, 2008-07-22 at 10:21 -0400, Justin Piszcz wrote: >> Hello, >> >> To be able to utilize 128 GiB of memory on a host, does one need to enable >> NUMA support? Currently only 64 GiB is showing up. >> >> As far as machine name/motherboard type, I do not have this information >> currently but I am told there are one or two of these boxes are running >> CentOS 5.x and/or RHEL5/AS. > > Sounds like you need to bug RH with that ;-) > >> Is there something special you need to do to utilize all 128 GiB of >> memory? > > Does a recent kernel work for you? Also, you could at the very least > have mentioned your machine architecture; is it x86_64, ia64 or ppc64? > Sun X4600, will find out if they are running the right kernel and also check the BIOS, thanks. Justin.