Re: Xen nuisance messages

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

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.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--