Re: [PATCH v3 0/3] More graceful handling of migration without passt-repair

[David Gibson <david@gibson.dropbear.id.au>]

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On Wed, Feb 26, 2025 at 08:01:13PM +0100, Stefano Brivio wrote:
> On Wed, 26 Feb 2025 17:04:19 +1100
> David Gibson <david@gibson.dropbear.id.au> wrote:
> 
> > From Red Hat internal testing we've had some reports that if
> > attempting to migrate without passt-repair, the failure mode is uglier
> > than we'd like.  The migration fails, which is somewhat expected, but
> > we don't correctly roll things back on the source, so it breaks
> > network there as well.
> > 
> > Handle this more gracefully allowing the migration to proceed in this
> > case, but allow TCP connections to break
> > 
> > I've test patches 1..2/3 reasonably:
> >  * I get a clean migration if there are now active flows
> >  * Migration completes, although connections are broken if
> >    passt-repair isn't connected
> >  * Basic test suite (minus perf)
> > 
> > Patch 3 I've run the basic test suite on, but haven't tested the
> > specific functionality of.  Alas, I've spent most of today battling
> > with RHEL, virt-install, unshare and various other things trying to
> > create a test environment simulating two hosts with (possibly)
> > different addresses.
> 
> Sorry, I've been busy with other stuff most of the day and I didn't
> manage to test the specific functionality of 3/3 either. :(
> 
> I reviewed this and it all looks good to me but I'm not sure if I
> should merge this now or wait until we manage to test the 3/3 case. Let
> me know your preference. I can also merge up to 2/3 if it makes things
> more convenient.

Feel free to merge 1..2/3 whenever you want.  I'll probably send a new
spin with some other things fixed as well today.

-- 
David Gibson (he or they)	| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you, not the other way
				| around.
http://www.ozlabs.org/~dgibson

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