Re: [Xen-devel] RAM security

[Jonathan Tripathy <jonnyt@xxxxxxxxxxx>]

On 06/12/10 16:52, Keir Fraser wrote:
> On 06/12/2010 08:31, "Jonathan Tripathy"<jonnyt@xxxxxxxxxxx>  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
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