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Differential D36801

Micro-optimize the application of MADV_WILLNEED to existing superpage mappings
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Authored by alc on Sep 29 2022, 6:16 PM.
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andrew
emaste
imp
mhorne

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kib
markj
manu
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rG1d5ebad06c20: pmap: optimize MADV_WILLNEED on existing superpages
Summary

Specifically, avoid the pointless calls to pmap_enter_quick_locked().

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rG FreeBSD src repository
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alc created this revision.Sep 29 2022, 6:16 PM
Herald added a reviewer: manu. · View Herald TranscriptSep 29 2022, 6:16 PM
Herald added subscribers: emaste, andrew. · View Herald Transcript
alc requested review of this revision.Sep 29 2022, 6:16 PM
kib accepted this revision.Sep 29 2022, 8:07 PM
This revision is now accepted and ready to land.Sep 29 2022, 8:07 PM
markj accepted this revision.Sep 30 2022, 2:33 PM
alc mentioned this in D36563: riscv: handle existing mapping in pmap_enter_l2().Sep 30 2022, 4:54 PM
Closed by commit rG1d5ebad06c20: pmap: optimize MADV_WILLNEED on existing superpages (authored by alc). · Explain WhySep 30 2022, 5:15 PM
This revision was automatically updated to reflect the committed changes.
alc added a commit: rG1d5ebad06c20: pmap: optimize MADV_WILLNEED on existing superpages.
Herald added a subscriber: imp. · View Herald TranscriptSep 30 2022, 5:15 PM
mhorne added a subscriber: mhorne.Oct 4 2022, 3:45 PM
mhorne added inline comments.
sys/amd64/amd64/pmap.c
7321

I believe this is meant to say KERN_RESOURCE_SHORTAGE instead. I can make the adjustment when I commit the related riscv pmap changes, if you like.

alc added inline comments.Oct 4 2022, 5:32 PM
sys/amd64/amd64/pmap.c
7321

Yes, you are correct. Yes, please make the fix when you commit the riscv changes.

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sys/
amd64/
amd64/
64 lines
arm64/
arm64/
59 lines

Diff 111283

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sys/amd64/amd64/pmap.c

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sys/arm64/arm64/pmap.c

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