>> o if swsusp does not need to write already-backed pages it could
>> reduce suspend time
>
> Hmmm. Not sure if it's worth the time taken to code & run figuring out
> if it's already backed, though :>. Would we ever be talking about a
> significant proportion of pages?
Depends on how aggressively you write them out, I guess.
Is there even a way to write pages to swap without unmapping them?
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