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powerpc/booke: Add pte_find_next() to find the next in-use PTE
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Authored by jhibbits on Mar 31 2020, 2:39 PM.

Details

Summary

Iterating over VM_MIN_ADDRESS->VM_MAXUSER_ADDRESS can take a very long
time iterating one page at a time (2**(log_2(SIZE)-12) operations),
yielding possibly several days or even weeks on 64-bit Book-E, even for
a largely empty, which can happen when swapping out a process by
vmdaemon. Speed this up by instead finding the next PTE at or equal to
the given VA.

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Repository
rS FreeBSD src repository
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Unit
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