From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xen.org>
Subject: Re: RAM security
Date: Mon, 06 Dec 2010 08:52:04 -0800
Message-ID: <C92254B4.153B9%keir@xen.org>
References: <4CFD0FF5.1010808@abpni.co.uk>
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To: Jonathan Tripathy <jonnyt@abpni.co.uk>, Xen-devel@lists.xensource.com
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On 06/12/2010 08:31, "Jonathan Tripathy" <jonnyt@abpni.co.uk> wrote:

>>> 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. Xen does the
scrubbing immediately before starting dom0, and you should see it say
'Scrubbing RAM...' and extra dots continur to appear until scrubbing is
complete.

 -- Keir