netdev - Re: [V5 PATCH] virtio-net: send gratuitous packets when needed

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Message-ID: <4F727909.5050609@redhat.com>
Date:	Wed, 28 Mar 2012 10:35:53 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, rusty@...tcorp.com.au,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, mst@...hat.com
Subject: Re: [V5 PATCH] virtio-net: send gratuitous packets when needed

On 03/28/2012 10:31 AM, David Miller wrote:
> From: Jason Wang<jasowang@...hat.com>
> Date: Fri, 16 Mar 2012 17:01:01 +0800
>
>> >  As hypervior does not have the knowledge of guest network configuration, it's
>> >  better to ask guest to send gratuitous packets when needed.
>> >  
>> >  Guest tests VIRTIO_NET_S_ANNOUNCE bit during config change interrupt and when it
>> >  is set, a workqueue is scheduled to send gratuitous packet through
>> >  NETDEV_NOTIFY_PEERS. This feature is negotiated through bit
>> >  VIRTIO_NET_F_GUEST_ANNOUNCE.
>> >  
>> >  Changes from v4:
>> >  - typos
>> >  - handle workqueue unconditionally
>> >  - move VIRTIO_NET_S_ANNOUNCE to bit 8 to separate rw bits from ro bits
>> >  
>> >  Changes from v3:
>> >  - cancel the workqueue during freeze
>> >  
>> >  Changes from v2:
>> >  - fix the race between unregister_dev() and workqueue
>> >  
>> >  Signed-off-by: Jason Wang<jasowang@...hat.com>
> What's happening with this patch?
Hi David:

I'm working on a new version of this patch as there's some changes in 
virtio-spec, I would post it soon.

Thanks
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