On 07/28/2016 01:07 AM, Prerna Saxena wrote:
> From: Prerna Saxena <prerna.sax...@nutanix.com>
> 
> This introduces the VHOST_USER_PROTOCOL_F_REPLY_ACK.
> 

> +
> +With this protocol extension negotiated, the sender (QEMU) can set the
> +"need_reply" [Bit 3] flag to any command. This indicates that
> +the client MUST respond with a Payload VhostUserMsg indicating success or
> +failure. The payload should be set to zero on success or non-zero on failure.
> +(Unless the message already has an explicit reply body)

Rather than make this parenthetical, I would go with:

The payload should be set to zero on success or non-zero on failure,
unless the message already has an explicit reply body.

> +
> +This indicates to QEMU that the requested operation has deterministically
> +been met or not. Today, QEMU is expected to terminate the main vhost-user

Reads awkwardly; maybe:

The response payload gives QEMU a deterministic indication of the result
of the command.

> +loop upon receiving such errors. In future, qemu could be taught to be more
> +resilient for selective requests.
> +
> +For the message types that already solicit a reply from the client, the
> +presence of VHOST_USER_PROTOCOL_F_REPLY_ACK or need_reply bit being set 
> brings
> +no behaviourial change. (See the 'Communication' section for details.)

s/behaviourial/behavioural/ (or if the document widely favors US
spelling, behavioral)


-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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