From: Qi Zhang Date: Tue, 10 Oct 2017 13:22:05 +0000 (-0400) Subject: net/i40e: fix mbuf free in vector Tx X-Git-Tag: spdx-start~1380 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=24853544c84c;p=dpdk.git net/i40e: fix mbuf free in vector Tx vPMD tx does not set sw_ring's mbuf to NULL after free. Therefore, in cases where the vector transmit function is in use, we must use the appropriate index and threshold values for the queue to only free the unreleased mbufs Fixes: b4669bb95038 ("i40e: add vector Tx") Cc: stable@dpdk.org Signed-off-by: Qi Zhang Acked-by: Bruce Richardson --- diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c index 3a8d32c861..f21c1c5d21 100644 --- a/drivers/net/i40e/i40e_rxtx.c +++ b/drivers/net/i40e/i40e_rxtx.c @@ -2305,18 +2305,40 @@ i40e_reset_rx_queue(struct i40e_rx_queue *rxq) void i40e_tx_queue_release_mbufs(struct i40e_tx_queue *txq) { + struct rte_eth_dev *dev; uint16_t i; + dev = &rte_eth_devices[txq->port_id]; + if (!txq || !txq->sw_ring) { PMD_DRV_LOG(DEBUG, "Pointer to rxq or sw_ring is NULL"); return; } - for (i = 0; i < txq->nb_tx_desc; i++) { - if (txq->sw_ring[i].mbuf) { + /** + * vPMD tx will not set sw_ring's mbuf to NULL after free, + * so need to free remains more carefully. + */ + if (dev->tx_pkt_burst == i40e_xmit_pkts_vec) { + i = txq->tx_next_dd - txq->tx_rs_thresh + 1; + if (txq->tx_tail < i) { + for (; i < txq->nb_tx_desc; i++) { + rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf); + txq->sw_ring[i].mbuf = NULL; + } + i = 0; + } + for (; i < txq->tx_tail; i++) { rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf); txq->sw_ring[i].mbuf = NULL; } + } else { + for (i = 0; i < txq->nb_tx_desc; i++) { + if (txq->sw_ring[i].mbuf) { + rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf); + txq->sw_ring[i].mbuf = NULL; + } + } } }