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 16:53:33 +0000
Message-ID: <4CFD150D.6070505@abpni.co.uk>
References: <C92254B4.153B9%keir@xen.org>
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To: Keir Fraser <keir@xen.org>, Xen-devel@lists.xensource.com
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On 06/12/10 16:52, Keir Fraser wrote:
> 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
>
I guess in my head I'm comparing RAM scrubbing to dd if=/dev/zero, which 
takes longer as it's usually to disk