From: Jonathan Tripathy <jonnyt@abpni.co.uk>
To: Keir Fraser <keir@xen.org>, Xen-devel@lists.xensource.com
Subject: Re: RAM security
Date: Mon, 06 Dec 2010 16:53:33 +0000 [thread overview]
Message-ID: <4CFD150D.6070505@abpni.co.uk> (raw)
In-Reply-To: <C92254B4.153B9%keir@xen.org>
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
next prev parent reply other threads:[~2010-12-06 16:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <46C13AA90DB8844DAB79680243857F0F0AFF44@server1.ABPNI.local>
2010-12-06 14:35 ` RAM security Jonathan Tripathy
2010-12-06 14:49 ` George Dunlap
2010-12-06 15:13 ` Jonathan Tripathy
2010-12-06 15:35 ` Jonathan Tripathy
2010-12-06 16:26 ` Keir Fraser
2010-12-06 16:31 ` Jonathan Tripathy
2010-12-06 16:52 ` Keir Fraser
2010-12-06 16:53 ` Jonathan Tripathy [this message]
2010-12-06 17:05 ` Jan Beulich
2010-12-06 17:12 ` Jonathan Tripathy
2010-12-06 17:17 ` Jonathan Tripathy
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