Messages in this thread | | | Date | Fri, 13 Apr 2012 13:38:04 -0400 (EDT) | Subject | Re: [net-next V7 PATCH] virtio-net: send gratuitous packets when needed | From | David Miller <> |
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From: Jason Wang <jasowang@redhat.com> Date: Thu, 12 Apr 2012 14:43:52 +0800
> As hypervior does not have the knowledge of guest network configuration, it's > better to ask guest to send gratuitous packets when needed. > > This patch implements VIRTIO_NET_F_GUEST_ANNOUNCE feature: hypervisor would > notice the guest when it thinks it's time for guest to announce the link > presnece. Guest tests VIRTIO_NET_S_ANNOUNCE bit during config change interrupt > and woule send gratuitous packets through netif_notify_peers() and ack the > notification through ctrl vq. > > We need to make sure the atomicy of read and ack in guest otherwise we may ack > more times than being notified. This is done through handling the whole config > change interrupt in an non-reentrant workqueue. > > Signed-off-by: Jason Wang <jasowang@redhat.com>
Michael, Rusty, et al.?
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