Re: [PATCH V2 13/13] migration: cpr-transfer mode

[Peter Xu <peterx@redhat.com>]

On Wed, Oct 09, 2024 at 04:18:31PM -0400, Steven Sistare wrote:
> Yes, I am also brainstorming along these lines, looking for more gotcha's,
> but its a big design change. I don't love it so far.
> 
> These issues all creep in because of transfer mode.  Exec mode did not have this
> problem, as cpr-state is written to an in-memory file.

I understand.  Hopefully we're getting there very soon..

I still have concern on having -global used in productions, and meanwhile
it might still be challenging for handshake to work as early as cpr stage
even for later, because at least in my mind the handshake still happens in
the main migration channel (where it includes channel establishments etc,
which is not proper during cpr stage).

I don't really know whether that'll work at last..

So in my mind the previous two-steps proposal is so far the only one that
all seem to work, with no unpredictable side effects.

Said that, maybe we can still think about simpler solutions in the
following days or see others opinions, we don't need to make a decision
today, so maybe there's still better way to go.

-- 
Peter Xu