From: Stefan Hajnoczi <stefanha@gmail.com>
To: Thibaut Collet <thibaut.collet@6wind.com>
Cc: Jason Wang <jasowang@redhat.com>,
Juan Quintela <quintela@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>,
Stefan Hajnoczi <stefanha@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v2] net: Add support of VIRTIO_NET_F_GUEST_ANNOUNCE for vhost-net/vhost-user
Date: Tue, 9 Jun 2015 11:43:54 +0100 [thread overview]
Message-ID: <20150609104354.GD27900@stefanha-thinkpad.redhat.com> (raw)
In-Reply-To: <CABUUfwMZ13vLEfhi+6vMFVLUx5T9hOi3hQ5UCnOp75VVHvshRA@mail.gmail.com>
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On Mon, Jun 08, 2015 at 05:32:38PM +0200, Thibaut Collet wrote:
> > 3. The easiest solution - nop .receive()
>
> The solution 3 is similar of my implementation and does not solve issue
> pointed by Jason: legacy guest do not send a gratuitous ARP.
Yes, but it prints a warning so the user is aware they are operating in
a degraded state.
Sending gratuitous ARP packets minimizes the time that network
infrastructure forwards packets to the old host. But the network
infrastructure will learn about the new host as long as the guest
sends outgoing packets after migration.
Putting these two things together, it seems acceptable to do #3. Most
users should be running a modern virtio-net that supports the announce
feature anyway.
Stefan
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next prev parent reply other threads:[~2015-06-09 10:44 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-28 8:03 [Qemu-devel] [PATCH 1/1] net: fix queue's purge on VM stop Thibaut Collet
2015-05-29 13:12 ` Stefan Hajnoczi
2015-05-29 14:28 ` Thibaut Collet
2015-06-02 10:34 ` Stefan Hajnoczi
2015-06-03 7:56 ` Thibaut Collet
2015-06-03 9:42 ` Jason Wang
2015-06-03 13:40 ` Stefan Hajnoczi
2015-06-04 9:35 ` Jason Wang
2015-06-05 13:24 ` [Qemu-devel] [PATCH v2] net: Add support of VIRTIO_NET_F_GUEST_ANNOUNCE for vhost-net/vhost-user Thibaut Collet
2015-06-08 5:55 ` Jason Wang
2015-06-08 8:21 ` Thibaut Collet
2015-06-08 9:14 ` Jason Wang
2015-06-08 10:01 ` Thibaut Collet
2015-06-08 10:09 ` Michael S. Tsirkin
2015-06-08 10:22 ` Jason Wang
2015-06-08 13:32 ` Stefan Hajnoczi
2015-06-08 14:05 ` Thibaut Collet
2015-06-08 15:13 ` Stefan Hajnoczi
2015-06-08 15:32 ` Thibaut Collet
2015-06-09 10:38 ` Stefan Hajnoczi
2015-06-09 10:43 ` Stefan Hajnoczi [this message]
2015-06-08 16:13 ` Michael S. Tsirkin
2015-06-09 2:35 ` Jason Wang
2015-06-08 10:12 ` Michael S. Tsirkin
2015-06-08 11:29 ` Thibaut Collet
2015-06-08 12:45 ` Michael S. Tsirkin
2015-06-08 13:20 ` Thibaut Collet
2015-06-08 15:48 ` Michael S. Tsirkin
2015-06-08 13:25 ` Stefan Hajnoczi
2015-06-03 9:42 ` [Qemu-devel] [PATCH 1/1] net: fix queue's purge on VM stop Stefan Hajnoczi
2015-06-01 9:17 ` Jason Wang
2015-06-01 10:14 ` Thibaut Collet
2015-06-03 9:40 ` Jason Wang
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