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Re: [Qemu-devel] [PATCH v3 2/2] vhost user: Add RARP injection for legac


From: Thibaut Collet
Subject: Re: [Qemu-devel] [PATCH v3 2/2] vhost user: Add RARP injection for legacy guest
Date: Thu, 11 Jun 2015 07:49:43 +0200

> Yes, but still need a mechanism to notify the backend of migration
> completion from qemu side if GUEST_ANNOUNCE is not negotiated.


backend is aware of a connection with the guest (with the feature negociation) and can send a rarp. This rarp will be always sent by the backend when a VM is launched (first start or live migration completion) if the GUEST_ANOUNCE is not supported.
In this case the issue is solved without done everything by QEMU.
If sending a rarp message on the start of te VM is not accceptable, we must provide a mechanism similar of the one I have implemented. The message content can be empty as the backend is able to create the rarp message.

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