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Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communic

From: Richard W.M. Jones
Subject: Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication
Date: Wed, 5 Aug 2009 19:32:04 +0100
User-agent: Mutt/1.5.18 (2008-05-17)

On Mon, Aug 03, 2009 at 02:57:01PM -0500, Anthony Liguori wrote:
> Richard W.M. Jones wrote:
>> On Mon, Jul 27, 2009 at 06:44:28PM -0500, Anthony Liguori wrote:
>>> It really suggests that you need _one_ vmchannel that's exposed to   
>>> userspace with a single userspace daemon that consumes it.
>> ... or a more flexible API.  I don't like having fixed /dev/vmch*
>> devices either.
> Have you considered using a usb serial device?  Something attractive  
> about it is that a productid/vendorid can be specified which means that  
> you can use that as a method of enumerating devices.
> Hot add/remove is supported automagically.

[ Meant to reply to this two days ago :-( ]

We're using -net channel ^W guestfwd in libguestfs now.  Apart from
the problem with using the "new syntax", which I hope to get around
to resolving some day, it performs quite well.

The userspace API is somewhat annoying.

Hot add/remove isn't a concern for us right now, nor is migration.
Since we can throw up new qemu-based appliances in a few seconds.


Richard Jones, Emerging Technologies, Red Hat  http://et.redhat.com/~rjones
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