Re: [Qemu-devel] [virtio-comment] Re: [PATCH v1] docs/vhost-user: extend the vhost-user protocol to support the vhost-pci based inter-vm communication

[Michael S. Tsirkin]

On Tue, Nov 08, 2016 at 12:17:38PM +0000, Marc-André Lureau wrote:
> Yes, that's the trouble. At any time the Master may send a request and expects
> an immediate reply. There is a race of getting a request from the Slave in the
> middle with your proposed change. I'd rather avoid making the request
> bidirectionnal if possible. (I proposed a second channel for Slave->Master
> request in the past: https://lists.gnu.org/archive/html/qemu-devel/2016-04/
> msg00095.html)

I don't have an issue with this, but supporting commands from
slave on the same channel shouldn't be too hard too,
and it's less work for the management.

-- 
MST