In D34717#925881, @corvink wrote:

I do agree, that this patch series does things in the wrong order. It would be better to add the cmdline parameter and especially the manpage entry as last step. So, I'm going to revert this commit.

In D34720#924367, @corvink wrote:

There are some patches in flight for using a nvlist for snapshot/restore. Wouldn't it be better to use it for migration too?
So, the sender could send a nvlist which contains information about all sections like memory, kern_structs etc. After that, both (sender and reciever) can send/recv all sections mentioned in the nvlist.

Addressed @corvink's comments and added Casper support.

Updated the patches to a newer version of FreeBSD.
Addressed @corvink's and @imp's comments.

We're preparing an update for the patches to a current version of FreeBSD. We'll address @corvink's and @imp's comments there. Thank you for those!

Addressed the comments from @markj for this and subsequent diffs as well as some other small fixes.