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SubjectSuggestion for laptop suspension
On my laptop, suspending to disk is slow.  It takes a whole minute, and
another minute to unsuspend--if all of core is in use. But it is much
faster when I do it not too long after the system was booted, when it has
not yet managed to use up most of core.

This suggests that it could be nice to make the kernel empty its caches, and
mark all that core "unused", when a suspend is about to happen. I don't
know the details of how suspension works, so I am not sure this is possible,
but I think there are hooks for doing something in the kernel before a
suspend.
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