Re: Xen nuisance messages

["Cherry G. Mathew" <cherry.g.mathew%gmail.com@localhost>]

On 24 February 2012 19:51, Manuel Bouyer <bouyer%antioche.eu.org@localhost> 
wrote:
> On Fri, Feb 24, 2012 at 08:58:04AM -0500, Thor Lancelot Simon wrote:
>> On Fri, Feb 24, 2012 at 08:56:44AM -0500, Greg Troxel wrote:
>> >
>> > > What's wrong with xbd?
>> >
>> > I think what might be wrong with xbd is that another domU could observe
>> > things that are correlated in time with the transactions on this domU,
>> > and thereby predict other domUs entropy values.
>>
>> What are those things, exactly?  Changes in the latency of its own disk
>> requests?
>
> that, and it could also influence the latency of other's disks requests.
> I'm not sure what the exact consequences are, so I prefer to leave
> users enable it explicitely. In my view, it's not much different
> from a network (pphysical) interface, which is disabled by default.
>


Considering that isolating "domains" from this sort of communication
was one of the primary goals of Nemesis (from which Xen was born),
it's odd that Xen doesn't address this.

-- 
~Cherry