Re: [PATCH 2/2] lguest: virtio-rng support

[H. Peter Anvin]

Johannes Berg wrote:
> > +
> > +/* Our random number generator device reads from /dev/urandom into the Guest's
> > + * input buffers.  The usual case is that the Guest doesn't want random numbers
> > + * and so has no buffers although /dev/urandom is still readable, whereas
> > + * console is the reverse.
>
> Is it really a good idea to use the hosts /dev/urandom to fill the
> guests /dev/random?

Only if you have an entropy estimate to go with it.  It's still dubious, 
though: the guests own pool will do its own mixing, so you might as well 
pull from /dev/random in the host as being a genuine entropy source and 
only add what entropy is available.

	-hpa
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