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Add some notes on live migration version and SPDK usage. #783

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Sep 18, 2023
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Add some notes on live migration version and SPDK usage. #783

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9 changes: 9 additions & 0 deletions README.md
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Expand Up @@ -241,6 +241,15 @@ demonstrate the benefits of shadow ioeventfd, see
Other usage notes
=================

Live migration
--------------

The `master` branch of `libvfio-user` implements live migration with a protocol
based on vfio's v2 protocol. Currently, there is no support for this in any qemu
client. For current use cases that support live migration, such as SPDK, you
should refer to the [https://github.com/nutanix/libvfio-user/tree/migration-v1]
(migration-v1 branch).

qemu
----

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5 changes: 5 additions & 0 deletions docs/spdk.md
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Expand Up @@ -96,6 +96,11 @@ Finally, type `q` in the source QEMU monitor to exit source QEMU.
For more information in live migration see
https://www.linux-kvm.org/page/Migration.

Note that the above live migration code in `qemu` and `SPDK` relies on the older
live migration format, this is kept in the
[https://github.com/nutanix/libvfio-user/tree/migration-v1](migration-v1)
branch of `libvfio-user`.

libvirt
-------

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