failover.rst 639 B

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  1. .. SPDX-License-Identifier: GPL-2.0
  2. ========
  3. FAILOVER
  4. ========
  5. Overview
  6. ========
  7. The failover module provides a generic interface for paravirtual drivers
  8. to register a netdev and a set of ops with a failover instance. The ops
  9. are used as event handlers that get called to handle netdev register/
  10. unregister/link change/name change events on slave pci ethernet devices
  11. with the same mac address as the failover netdev.
  12. This enables paravirtual drivers to use a VF as an accelerated low latency
  13. datapath. It also allows live migration of VMs with direct attached VFs by
  14. failing over to the paravirtual datapath when the VF is unplugged.