Re: [RFC PATCH 34/35] Add the Xen virtual network device driver.

Herbert Xu
2006-05-11T08:05:03Z

On Thu, May 11, 2006 at 08:49:04AM +0100, Keir Fraser wrote:
>
> The alternatives are unattractive:
> 1. We have no good way to distinguish interrupts caused by packets
> from local VMs versus packets from remote hosts. Both get muxed on the
> same virtual interface.
> 2. An entropy front/back is tricky -- how do we decide how much
> entropy to pull from domain0? How much should domain0 be prepared to
> give other domains? How easy is it to DoS domain0 by draining its
> entropy pool? Yuk.

IMHO there just isn't enough real entropy to go around in one physical
machine without a proper HRNG. So either use urandom in all the guests
or for those that really have to use /dev/random, install a hardware
RNG (or wait for it :).

Cheers,
--
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Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
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