| Sridhar Samudrala | 30c8bd5 | 2018-05-24 09:55:13 -0700 | [diff] [blame] | 1 | .. SPDX-License-Identifier: GPL-2.0 |
| 2 | |
| 3 | ======== |
| 4 | FAILOVER |
| 5 | ======== |
| 6 | |
| 7 | Overview |
| 8 | ======== |
| 9 | |
| 10 | The failover module provides a generic interface for paravirtual drivers |
| 11 | to register a netdev and a set of ops with a failover instance. The ops |
| 12 | are used as event handlers that get called to handle netdev register/ |
| 13 | unregister/link change/name change events on slave pci ethernet devices |
| 14 | with the same mac address as the failover netdev. |
| 15 | |
| 16 | This enables paravirtual drivers to use a VF as an accelerated low latency |
| 17 | datapath. It also allows live migration of VMs with direct attached VFs by |
| 18 | failing over to the paravirtual datapath when the VF is unplugged. |