During migration we send the current serial, but i don't see where we read this back when handling the migration message.
This got removed and refactored in: commit 934fb14ccc731689369c55ead8125a590c0c4343 Author: Yonit Halperin <yhalperi@redhat.com> Date: Mon Aug 6 14:39:22 2012 +0300 snd_worker: handling migration
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