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Mention mixed page sizes
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~ [http://forum.osdev.org/viewtopic.php?p=198045#p198045 Brendan]
Luckily though you can freely mix 4k, 2MiB and 1GiB pages. You don't have to use an uniform page size for everything. So a process having 9MB of data can get 4 2MiB pages and make up the rest with 4k pages. That saves paging structures, improves TLB usage and does not increase the overhead at all.
== Recursive mapping ==
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