From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 8B07CA0471 for ; Tue, 18 Jun 2019 09:43:57 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 4553A1C12B; Tue, 18 Jun 2019 09:43:36 +0200 (CEST) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id E4E191C0DC; Tue, 18 Jun 2019 09:43:29 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 18 Jun 2019 00:43:29 -0700 X-ExtLoop1: 1 Received: from npg-dpdk-virtio-tbie-2.sh.intel.com ([10.67.104.151]) by orsmga006.jf.intel.com with ESMTP; 18 Jun 2019 00:43:28 -0700 From: Tiwei Bie To: maxime.coquelin@redhat.com, zhihong.wang@intel.com, dev@dpdk.org Cc: stable@dpdk.org Date: Tue, 18 Jun 2019 15:41:59 +0800 Message-Id: <20190618074159.3322-5-tiwei.bie@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190618074159.3322-1-tiwei.bie@intel.com> References: <20190618074159.3322-1-tiwei.bie@intel.com> Subject: [dpdk-dev] [PATCH 4/4] net/virtio: fix packets check in mergeable packed Rx X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" We should check the descriptor state instead of vq's internal free count (i.e. the number of descriptors that we haven't made available) for the remaining mergeable packets. Fixes: a76290c8f1cf ("net/virtio: implement Rx path for packed queues") Cc: stable@dpdk.org Signed-off-by: Tiwei Bie --- drivers/net/virtio/virtio_rxtx.c | 50 +++++++++++++++----------------- 1 file changed, 23 insertions(+), 27 deletions(-) diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c index 8b75291f5..b5062ff84 100644 --- a/drivers/net/virtio/virtio_rxtx.c +++ b/drivers/net/virtio/virtio_rxtx.c @@ -1882,38 +1882,34 @@ virtio_recv_mergeable_pkts_packed(void *rx_queue, while (seg_res != 0) { uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res, VIRTIO_MBUF_BURST_SZ); - if (likely(vq->vq_free_cnt >= rcv_cnt)) { - num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, - len, rcv_cnt); - uint16_t extra_idx = 0; + uint16_t extra_idx = 0; - rcv_cnt = num; - - while (extra_idx < rcv_cnt) { - rxm = rcv_pkts[extra_idx]; - - rxm->data_off = - RTE_PKTMBUF_HEADROOM - hdr_size; - rxm->pkt_len = (uint32_t)(len[extra_idx]); - rxm->data_len = (uint16_t)(len[extra_idx]); - - prev->next = rxm; - prev = rxm; - rx_pkts[nb_rx]->pkt_len += len[extra_idx]; - extra_idx += 1; - } - seg_res -= rcv_cnt; - if (!seg_res) { - virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); - nb_rx++; - } - } else { - PMD_RX_LOG(ERR, - "No enough segments for packet."); + rcv_cnt = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, + len, rcv_cnt); + if (unlikely(rcv_cnt == 0)) { + PMD_RX_LOG(ERR, "No enough segments for packet."); rte_pktmbuf_free(rx_pkts[nb_rx]); rxvq->stats.errors++; break; } + + while (extra_idx < rcv_cnt) { + rxm = rcv_pkts[extra_idx]; + + rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; + rxm->pkt_len = (uint32_t)(len[extra_idx]); + rxm->data_len = (uint16_t)(len[extra_idx]); + + prev->next = rxm; + prev = rxm; + rx_pkts[nb_rx]->pkt_len += len[extra_idx]; + extra_idx += 1; + } + seg_res -= rcv_cnt; + if (!seg_res) { + virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); + nb_rx++; + } } rxvq->stats.packets += nb_rx; -- 2.17.1