RE: [virtio-comment] Re: [virtio] Re: [PATCH v10 04/10] admin: introduce virtio admin virtqueues

[Parav Pandit <parav@nvidia.com>]

> From: Stefan Hajnoczi <stefanha@redhat.com>
> Sent: Tuesday, March 7, 2023 2:04 PM

> An alternative is unconditional out-of-order completion, where there are no
> per-command ordering rules. The driver must wait for a command to complete
> if it relies on the results of that command for its next command. I like this
> approach because it's less complex in the spec and for device implementers,
> while the burden on the driver implementer is still reasonable.
+1.
This has best of both.
1. Command ordering knowledge and hence the decision left to the one which issues them. (driver).
2. Ability to execute multiple unrelated commands using a single AQ.
3. stateless device in AQ command execution