Differential D24238

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.

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rS359792: powerpc/booke: Add pte_find_next() to find the next in-use PTE

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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rS FreeBSD src repository - subversion

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Event Timeline

jhibbits created this revision.Mar 31 2020, 2:39 PM

Harbormaster completed remote builds in B30208: Diff 70057.Mar 31 2020, 2:40 PM

jhibbits added a parent revision: D24220: powerpc/booke: Change Book-E 64-bit pmap to 4-level table.Mar 31 2020, 2:43 PM

Fix the build

Harbormaster completed remote builds in B30210: Diff 70059.Mar 31 2020, 2:54 PM

Fix 32-bit boot. Tested in qemu.

Harbormaster completed remote builds in B30221: Diff 70076.Mar 31 2020, 9:19 PM

Works on X5000 and RB800.

This revision is now accepted and ready to land.Apr 10 2020, 9:32 PM

Closed by commit rS359792: powerpc/booke: Add pte_find_next() to find the next in-use PTE (authored by jhibbits). · Explain WhyApr 11 2020, 12:17 AM

This revision was automatically updated to reflect the committed changes.

jhibbits added a commit: rS359792: powerpc/booke: Add pte_find_next() to find the next in-use PTE.

Herald added a subscriber: imp. · View Herald TranscriptApr 11 2020, 12:17 AM

Revision Contents
Changeset List

Path

Size

head/

sys/

powerpc/

booke/

9 lines

29 lines

45 lines

Diff 70421

head/sys/powerpc/booke/pmap.c

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head/sys/powerpc/booke/pmap_32.c

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head/sys/powerpc/booke/pmap_64.c

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