netdev - Re: AF_VSOCK loopback

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Message-ID: <20161114191446.GH1352@stefanha-x1.localdomain>
Date:   Mon, 14 Nov 2016 19:14:46 +0000
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     "Jorgen S. Hansen" <jhansen@...are.com>
Cc:     "cavery@...hat.com" <cavery@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: AF_VSOCK loopback

On Fri, Nov 11, 2016 at 02:14:44PM +0000, Jorgen S. Hansen wrote:
> Hi Stefan,
> 
> All datagram communication in VMCI based AF_VSOCK is going through the host - also for loopback communication. The only difference wrt loopback is that the VMCI queue pairs implementing the shared queues for the stream protocols aren't registered with the hypervisor - they are created specifying the VMCI_QPFLAG_LOCAL flag, and exist only as local guest memory.
> 
> So in the current form, there isn't much loopback code in the vmci AF_VSOCK implementation, so it doesn't seem like there would be much to share either.

Thanks for clarifying.  I'm playing with a virtio-vsock implementation
of loopback and expect send patches later this week.

Stefan

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