RE: migrate_set_downtime bug

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> We used to have a heuristic that said 'if an iteration transfers more
> pages than the previous iteration, we've stopped converging'.  Why
> wouldn't that work?

I agree that this is the 'right' approach - but it is just too difficult to detect that we are not 'converging', and it does not set a limit on migration time.

- Dietmar

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