RE: [PATCH] AF_VMCHANNEL address family for guest<->host communication.

Itamar Heim
2008-12-15T18:27:02Z

> -----Original Message-----
> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org] On
> Behalf Of Jeremy Fitzhardinge

> The trouble is that it presumes that the host and guest (or whoever the
> endpoints are) are on the same physical machine and will remain that
> way. Given that live migration is a feature that people seem to like,
> then you'd end up needing to transport this protocol over a real network
> anyway - and at that point you may as well use proper TCP/IP. The
> alternative is to say either "if you use this feature you can't migrate,
> and you can only resume on the same host", or "you can use this feature,
> and we'll work out a global namespace and proxy it over TCP for you".
> Neither seems very satisfactory.
[IH] when migrating a guest to another host, migration takes care of
closing/opening of the VMChannel on the target host. The VMChannel is
local to the hypervisor, not accessible via network. Migration is not an
issue requiring the VMChannel to use TCP/IP.