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Re: [Xen-devel] Regarding PAE kernel with Xen 3.2.3

To: Rajiv Rajaian <rajiv.grid@xxxxxxxxx>
Subject: Re: [Xen-devel] Regarding PAE kernel with Xen 3.2.3
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Wed, 29 Jul 2009 16:03:55 +0300
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On Tue, Jul 28, 2009 at 01:00:16PM +0000, Rajiv Rajaian wrote:
> Hi
>  I ve installed xen 3.2.3 in DELL Server with Redhat Enterprise Server 5
> Having Quad-Core AMD Opteron(tm) Processor 8350 & 32 GB RAM
> While booting with PAE kernel  Memory shows 32 GB RAM
> [root@careserver ~]# cat /proc/meminfo
> MemTotal:     33264952 kB
> MemFree:      28127132 kB
> [root@careserver ~]# uname -r
> 2.6.18-8.el5PAE
> While booting with xen kernel It shows only 13GB RAM in proc/meminfo
> as well as the xm info

Is this 32bit kernel/xen? I think 32bit PAE Xen hypervisor is limited to 16 GB 
memory support.

You need 64bit Xen for 32GB RAM. dom0 kernel can still be 32bit PAE, if you
need that.

> Here the xen rpms I ve installed
> [root@careserver ~]# rpm -qa | grep xen
> kernel-xen-2.6.18-128.2.1.el5
> xen-devel-3.2.3-0xs
> xen-libs-3.2.3-0xs
> xen-3.2.3-0xs
> xen-debuginfo-3.2.3-0xs

where did you get these rpms? 

Have you tried Xen 3.3.1 or 3.4.0 from http://www.gitco.de/repo/ ?

> Will it show only the partial physical memory ?? .. Or any thing else
> to be configured to get the total 32GB RAM with xen kernel??
> How to get all the RAM with PAE support ??
> Please give your valuable suggestions

-- Pasi

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