From: Chas Williams <3chas3@gmail.com>
To: dev@dpdk.org
Subject: [dpdk-dev] MTU vs MRU
Date: Tue, 25 Sep 2018 20:38:34 -0400 [thread overview]
Message-ID: <f21f94db-39a5-7e05-796a-4cb41fff40e9@gmail.com> (raw)
What does (or should) rte_eth_dev_set_mtu() do? The documentation says
"Change the MTU of an Ethernet device." At least of few of the PMDs do
something similar to the following:
eth_em_infos_get(dev, &dev_info);
frame_size = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ...
/* check that mtu is within the allowed range */
if ((mtu < ETHER_MIN_MTU) || (frame_size > dev_info.max_rx_pktlen))
return -EINVAL;
/* update max frame size */
dev->data->dev_conf.rxmode.max_rx_pkt_len = frame_size;
What does max_rx_pkt_len mean here? MRU or is pkt here really frame?
reply other threads:[~2018-09-26 0:38 UTC|newest]
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