decaf live migration

[zach.tu...@gmail.com]

How should I modify the code to support live migration?

After starting decaf, running the migrate command will report the following error:

error:invalid runstate transition:'running' -> ‘inmigrate'

aborted(core dumped)

[Heng Yin]

There is no short answer for this question. In general, live migration
relies on properly saving and restoring the machine state, including
memory, CPU state, and the state of IO devices. DECAF has already
added functionality for saving and restoring some additional states,
such as shadow memory, hooks, VMI state, etc. But it has not been
tested extensively. Also, if you load a plugin, and would like that
plugin to work properly, you need to save and restore the plugin
related state as well.

Heng

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