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Differential D56339

iflib: ignore reclaim coalescing when low on tx descriptors
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Authored by gallatin on Apr 9 2026, 11:35 PM.
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zlei
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sumit.saxena_broadcom.com
shurd
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iflib
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rG52e7958702be: iflib: ignore reclaim coalescing when low on tx descriptors
Summary

If we are low on TX descriptors, bypass iflib_txq_can_reclaim() and force a reclaim. This is intended to reduce the number of output drops under heavy load when using simple transmit.

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rG FreeBSD src repository
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gallatin created this revision.Apr 9 2026, 11:35 PM
Herald added a reviewer: shurd. · View Herald TranscriptApr 9 2026, 11:35 PM
Herald added a reviewer: iflib. · View Herald Transcript
Herald added subscribers: glebius, melifaro, ae, imp. · View Herald Transcript
gallatin requested review of this revision.Apr 9 2026, 11:35 PM
This revision was not accepted when it landed; it landed in state Needs Review.Apr 17 2026, 5:35 PM
Closed by commit rG52e7958702be: iflib: ignore reclaim coalescing when low on tx descriptors (authored by gallatin). · Explain Why
This revision was automatically updated to reflect the committed changes.
gallatin added a commit: rG52e7958702be: iflib: ignore reclaim coalescing when low on tx descriptors.

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sys/
net/
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sys/net/iflib.c

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