From: Rusty Russell <rusty@rustcorp.com.au>
To: Vlad Zolotarov <vladz@cloudius-systems.com>, kvm@vger.kernel.org
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: virtio specification: OOO completion of the xmit buffers in the networking device
Date: Wed, 04 Jun 2014 13:22:49 +0930 [thread overview]
Message-ID: <871tv549gu.fsf@rustcorp.com.au> (raw)
In-Reply-To: <538C7D2D.8080508@cloudius-systems.com>
Vlad Zolotarov <vladz@cloudius-systems.com> writes:
> Rusty, hi!
> I'd like to ask for a small clarification about the virtio spec.
> The virtio specification is put the way that it allows the out-of-order
> completions in general. Although it states that it's mostly relevant to
> the virtio-blk it doesn't explicitly bans it for virtio networking
> devices (for generality?).
Indeed.
> (AFAICS the current virtio HV implementations make sure there is no OOO
> Tx buffers completions).
>
> I wonder if this feature (OOO Tx buffers completions) seems practical to
> u and if not can I hope that it could be clearly stated in the future
> virtio specification releases that it's forbidden?
Are you sure that vhost-net doesn't allow async completion already?
I can't immediately see why it can't happen, but MST is CC'd.
Cheers,
Rusty.
next prev parent reply other threads:[~2014-06-04 4:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-02 13:33 virtio specification: OOO completion of the xmit buffers in the networking device Vlad Zolotarov
2014-06-04 3:52 ` Rusty Russell [this message]
2014-06-04 18:54 ` Michael S. Tsirkin
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