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Page table optimization #66

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merged 7 commits into from Dec 18, 2017

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@weclaw1
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commented Dec 17, 2017

Use unused bits 51-61 in first entries of each page table as a counter for used entries.
I also removed unnecessary checks in unmap_inner.
After this change checking if page table is empty is a O(1) operation instead of O(N), where N is the number of entries.

@jackpot51 jackpot51 merged commit a9fa08f into redox-os:master Dec 18, 2017
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commented Dec 18, 2017

Thanks very much!

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