bq_insert: delay the BUF_UNLOCK if not bd_flush()ing
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Authored by rlibby on May 11 2026, 7:42 PM.

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olce

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kib
markj
jeff

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rG2a56cedac2e4: bq_insert: delay the BUF_UNLOCK if not bd_flush()ing

Summary

Reduce bufqueue lock contention by delaying the BUF_UNLOCK to after
dropping the bufqueue lock. Still do the early BUF_UNLOCK if we
actually have to bd_flush.

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rG FreeBSD src repository

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Event Timeline

rlibby created this revision.May 11 2026, 7:42 PM

Herald added subscribers: olce, imp. · View Herald TranscriptMay 11 2026, 7:42 PM

rlibby requested review of this revision.May 11 2026, 7:42 PM

Harbormaster completed remote builds in B72990: Diff 177600.May 11 2026, 7:42 PM

rlibby added reviewers: kib, markj, jeff.May 11 2026, 7:44 PM

kib accepted this revision.May 11 2026, 7:48 PM

This revision is now accepted and ready to land.May 11 2026, 7:48 PM

markj accepted this revision.May 12 2026, 1:13 PM

Closed by commit rG2a56cedac2e4: bq_insert: delay the BUF_UNLOCK if not bd_flush()ing (authored by rlibby). · Explain WhyMay 13 2026, 5:45 PM

This revision was automatically updated to reflect the committed changes.

rlibby added a commit: rG2a56cedac2e4: bq_insert: delay the BUF_UNLOCK if not bd_flush()ing.

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sys/

kern/

vfs_bio.c

20 lines

Diff 177797

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bq_insert: delay the BUF_UNLOCK if not bd_flush()ingClosedPublicActions