Increase the default mlock limit from 64k to 256k
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Authored by asomers on Aug 12 2026, 11:37 PM.

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cy
imp
jhb
emaste
markj

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rGd9cf2a867184: Increase the default mlock limit from 64k to 256k

Summary

The current default has been unchanged for 14 years. Increase it to
keep pace with modern hardware and software. security/pinentry-gnome,
in particular, can sometimes need 112 kB.

PR: 297452
MFC after: 2 weeks
Sponsored by: ConnectWise

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rG FreeBSD src repository

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Event Timeline

asomers created this revision.Aug 12 2026, 11:37 PM

Herald added a subscriber: imp. · View Herald TranscriptAug 12 2026, 11:37 PM

asomers requested review of this revision.Aug 12 2026, 11:37 PM

Herald added a subscriber: andrew_tao173.riddles.org.uk. · View Herald TranscriptAug 12 2026, 11:37 PM

Harbormaster completed remote builds in B75542: Diff 183953.Aug 12 2026, 11:37 PM

I see no problem with this. What do others think?

This revision is now accepted and ready to land.Aug 13 2026, 3:20 PM

I think Linux in-kernel default is 8MB, not sure if they have a separate lower limit equivalent to this. But I think increasing it a bit is fine if there are common-enough ports that want more than the current small 64K.

Closed by commit rGd9cf2a867184: Increase the default mlock limit from 64k to 256k (authored by asomers). · Explain WhyFri, Aug 14, 2:33 PM

This revision was automatically updated to reflect the committed changes.

asomers added a commit: rGd9cf2a867184: Increase the default mlock limit from 64k to 256k.

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usr.bin/

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Increase the default mlock limit from 64k to 256kClosedPublicActions