[Qemu-devel] Debugging Migration

[John Snow]

Is there a convenient way of "pausing" or stalling a live migration to
allow methodical testing of race conditions?

I'd like to instrument something along the lines of:

(1) Live migration begins.
(2) migration is artificially halted or paused, but QEMU is allowed to run.
(3) Some additional qtest/QMP commands are received and processed.
(4) migration is allowed to resume.

Does anyone have perhaps even test patches to instrument this sort of
thing, or is it up to detective john to add it if he wants it?

Thanks,
--js