Documentation / networking / failover.rst


Based on kernel version 5.12. Page generated on 2021-04-27 09:53 EST.

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.. SPDX-License-Identifier: GPL-2.0

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FAILOVER
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Overview
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The failover module provides a generic interface for paravirtual drivers
to register a netdev and a set of ops with a failover instance. The ops
are used as event handlers that get called to handle netdev register/
unregister/link change/name change events on slave pci ethernet devices
with the same mac address as the failover netdev.

This enables paravirtual drivers to use a VF as an accelerated low latency
datapath. It also allows live migration of VMs with direct attached VFs by
failing over to the paravirtual datapath when the VF is unplugged.