From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [DPDK/ethdev Bug 1958] Broadcom bnxt RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE always on
Date: Wed, 17 Jun 2026 14:51:42 +0000 [thread overview]
Message-ID: <bug-1958-3@http.bugs.dpdk.org/> (raw)
http://bugs.dpdk.org/show_bug.cgi?id=1958
Bug ID: 1958
Summary: Broadcom bnxt RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE always
on
Product: DPDK
Version: 26.03
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: dev@dpdk.org
Reporter: riaan.wiid@vastech.co.za
Target Milestone: ---
Environment
===========
dpdk-26.03 (tag v26.03)
OS: Rocky Linux (9.3 (Blue Onyx))
HW: Broadcom BCM57414 NetXtreme-E 10Gb/25Gb
Compiler: gcc 14.2.1 20240801 (Red Hat 14.2.1-1)
Description of Problem
======================
RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE is always enabled if not enabling PTP support
on a NIC port. In our case we are not enabling PTP support which means
RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE is enabled by default on all queues, which is
undesired behaviour when making use of Mbuf refcnt in our designs.
This behaviour seems to have started after this commit
https://github.com/DPDK/dpdk/commit/5722ed1aafd2fc5ad44e432a4f6c7bd337c673d8
RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE cannot be disabled through the offloads
specified in either rte_eth_dev_configure() or rte_eth_tx_queue_setup()
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