Suspend-To-Disk / Hibernate hypothetical question

[Kevin Flynn]

My understanding is that hibernation is achieved by copying the contents of 
(used?) RAM to the system swap disk partition.

Hypothetical question:  What if the total memory (physical + swap) in use 
exceeds the size of the swap space?  How can hibernation then occur?

Thanks for any insights.  (Also thanks to the developers for this 
functionality!)

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