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Re: [Qemu-devel] [V5 PATCH 0/4] Send gratuitous packets by guest
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [V5 PATCH 0/4] Send gratuitous packets by guest |
Date: |
Tue, 27 Mar 2012 08:27:16 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Mon, Mar 26, 2012 at 05:10:15PM -0500, Anthony Liguori wrote:
> On 03/16/2012 03:54 AM, Jason Wang wrote:
> >This an update of series that let guest and qemu to be co-operated to
> >send gratuitous packets when needed such as after migration, loadvm
> >and continuing.
> >
> >As it's hard for qemu to track the network configuration in guest such
> >as bondings, vlans or ipv6. So current gratuitous may not work under
> >those situations.
>
> Can you be more specific about the failure scenarios?
>
> Does this mean that migration cannot work today with guests using
> ipv6? I don't think just pushing this to the guest is an acceptable
> solution in the short term.
>
> Are there scenarios we cannot handle no matter what in the host?
Consider a nested virt scenario. It seems clear that you either
must notify the guest about migration, or learn nested
guest macs.
> Does this mean that for emulated drivers, we're completely out of
> luck?
>
> Regards,
>
> Anthony Liguori
For these, I think we can cause announcements by sending link up event
to the guest.
--
MST
- Re: [Qemu-devel] [V5 PATCH 1/4] net: announce self after vm start, (continued)
- Re: [Qemu-devel] [V5 PATCH 1/4] net: announce self after vm start, Jason Wang, 2012/03/16
- Re: [Qemu-devel] [V5 PATCH 1/4] net: announce self after vm start, Paolo Bonzini, 2012/03/16
- Re: [Qemu-devel] [V5 PATCH 1/4] net: announce self after vm start, Jason Wang, 2012/03/16
- Re: [Qemu-devel] [V5 PATCH 1/4] net: announce self after vm start, Paolo Bonzini, 2012/03/16
- Re: [Qemu-devel] [V5 PATCH 1/4] net: announce self after vm start, Jason Wang, 2012/03/18
[Qemu-devel] [V5 PATCH 2/4] net: model specific announcing support, Jason Wang, 2012/03/16
[Qemu-devel] [V5 PATCH 3/4] virtio-net: notify guest to annouce itself, Jason Wang, 2012/03/16
[Qemu-devel] [V5 PATCH 4/4] virtio-net: compat guest announce support., Jason Wang, 2012/03/16
Re: [Qemu-devel] [V5 PATCH 0/4] Send gratuitous packets by guest, Anthony Liguori, 2012/03/26