sysctl: mark more nodes as MPSAFE
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Authored by kaktus on Jan 5 2020, 10:28 AM.

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kib
mjg
manu

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rS356413: sysctl: mark more nodes as MPSAFE

Summary

vm.kvm_size and vm.kvm_free are read only and marked as MPSAFE on i386 already. Mark them as that on amd64 and arm64 too to avoid locking Giant.

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rS FreeBSD src repository - subversion

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kaktus created this revision.Jan 5 2020, 10:28 AM

Herald added a reviewer: manu. · View Herald TranscriptJan 5 2020, 10:28 AM

Herald added subscribers: emaste, andrew, imp. · View Herald Transcript

val_packett.cool added a subscriber: val_packett.cool.Jan 5 2020, 12:10 PM

Due to resurrected efforts to get rid of Giant, It might be worth to make add a flag now to mark non-mpsafe sysctls, and remove CFLFLAG_MPSAFE. I am not sure how huge the work itself, and the churn, would be.

This revision is now accepted and ready to land.Jan 6 2020, 12:53 AM

Closed by commit rS356413: sysctl: mark more nodes as MPSAFE (authored by kaktus). · Explain WhyJan 6 2020, 10:52 AM

This revision was automatically updated to reflect the committed changes.

kaktus added a commit: rS356413: sysctl: mark more nodes as MPSAFE.

Revision Contents
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Path

Size

head/

sys/

amd64/

pmap.c

10 lines

arm64/

pmap.c

10 lines

Diff 66405

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head/sys/amd64/amd64/pmap.c