sched_4bsd: remove kern.sched.4bsd.followon
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Authored by mchoo on Sep 4 2026, 5:33 PM.

Details

Reviewers

jhb
olce

Group Reviewers

scheduler

Commits

rGc7c6e744ad43: sched_4bsd: remove kern.sched.4bsd.followon
rGd33c9cbc3e6e: sched_4bsd: remove kern.sched.4bsd.followon
rGd29c9f5aca34: sched_4bsd: remove kern.sched.4bsd.followon

Summary

kern.sched.4bsd.followon was enabled only for KSE. It was never compiled
since ad1e7d285ab1 and since KSE is now completely removed, we should
remove this tunable.

MFC after: 2 weeks
MFC to: stable/14, stable/15
Sponsored by: FreeBSD Foundation

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Skipped

Unit

Tests Skipped

Build Status

Buildable 76502
Build 73385: arc lint + arc unit

Event Timeline

mchoo created this revision.Sep 4 2026, 5:33 PM

Herald added subscribers: olce, imp. · View Herald TranscriptSep 4 2026, 5:33 PM

mchoo requested review of this revision.Sep 4 2026, 5:33 PM

Harbormaster completed remote builds in B76502: Diff 185830.Sep 4 2026, 5:33 PM

mchoo added reviewers: scheduler, jhb.Sep 4 2026, 5:38 PM

olce accepted this revision.Sep 6 2026, 3:42 PM

This revision is now accepted and ready to land.Sep 6 2026, 3:42 PM

Suggestion: Rework the end of the commit message for something more concise, such as "is now completely removed, we should remove this tunable." => "and KSE was removed years ago.".

mchoo added a child revision: D59395: sched_4bsd: remove dumping from maybe_preempt().Sun, Sep 6, 6:45 PM

Closed by commit rGd29c9f5aca34: sched_4bsd: remove kern.sched.4bsd.followon (authored by mchoo). · Explain WhyFri, Sep 18, 2:15 PM

This revision was automatically updated to reflect the committed changes.

mchoo added a commit: rGd29c9f5aca34: sched_4bsd: remove kern.sched.4bsd.followon.

mchoo added a commit: rGd33c9cbc3e6e: sched_4bsd: remove kern.sched.4bsd.followon.Fri, Oct 2, 3:35 PM

mchoo added a commit: rGc7c6e744ad43: sched_4bsd: remove kern.sched.4bsd.followon.Fri, Oct 2, 3:50 PM