From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jonathan Tripathy <jonnyt@abpni.co.uk>
Subject: Re: RAM security
Date: Mon, 06 Dec 2010 17:12:14 +0000
Message-ID: <4CFD196E.2080403@abpni.co.uk>
References: <4CFD0FF5.1010808@abpni.co.uk> <C92254B4.153B9%keir@xen.org>
	<4CFD25F702000078000262DB@vpn.id2.novell.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <4CFD25F702000078000262DB@vpn.id2.novell.com>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Jan Beulich <JBeulich@novell.com>, Xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

3) If the physical server was shutdown (e.g. plug pulled), I'm guessing
>>>>> this will presetn a problem?
>>>> Xen scrubs all memory during boot, unless told not to via a boot parameter.
>>>>
>>> Now this bit of code makes me happy!
>>>
>>> Just wondering, if Xen scrubs all memory during boot, why is booting the
>>> Hypervisor so fast? My machine has 8GB of RAM and starts nice and snappy..
>> It probably takes just a couple of seconds to scrub 8GB.
> Plus it doesn't scrub the memory assigned to Dom0.
>
Doesn't this mean that if Dom0 releases some memory back to Xen, then 
Xen gives it to another domain, data leakage could occur?

Would one way to prevent this be to disable ballooning?

Thanks