linux-kernel - Re: [RFC V2 PATCH] virtio-spec: ack the announce notification through ctrl

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Message-ID: <878viochwi.fsf@rustcorp.com.au>
Date:	Mon, 26 Mar 2012 11:12:05 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Jason Wang <jasowang@...hat.com>,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, mst@...hat.com
Subject: Re: [RFC V2 PATCH] virtio-spec: ack the announce notification through ctrl_vq

On Fri, 23 Mar 2012 11:05:01 +0800, Jason Wang <jasowang@...hat.com> wrote:
> During link announcement, driver needs a method to notify device that it has
> received the notification and let it clear the VIRITO_NET_S_ANNOUNCE bit in the
> status field. Doing this through a dedicated command looks suitable for all
> platforms (especially for the ones who don't trap the status read or write) with
> a ctrl vq and can solve the race between host and guest.
> 
> So this patch makes VIRTIO_NET_F_ANNOUNCE depends on VIRTIO_NET_F_CTRL_VQ and
> introduces a dedicated command VIRTIO_NET_CTRL_ANNOUNCE_ACK to let device clear
> the VIRTIO_NET_S_ANNOUNCE bit in the status field.

Applied, thanks!

Cheers,
Rusty.
-- 
  How could I marry someone with more hair than me?  http://baldalex.org
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