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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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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Tests Not Applicable

Event Timeline

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.

Revision Contents
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Path

Size

sys/

amd64/

amd64/

64 lines

arm64/

arm64/

59 lines

Diff 111283

sys/amd64/amd64/pmap.c

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sys/arm64/arm64/pmap.c

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