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iflib: ignore reclaim coalescing when low on tx descriptors
Needs ReviewPublic

Authored by gallatin on Thu, Apr 9, 11:35 PM.

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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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