[dpdk-users] When do we get non-contiguous mbufs from rte_eth_rx_burst?

[Stephen Hemminger]

On Thu, 9 Feb 2017 22:17:56 +0000
"Lazarenko, Vlad (WorldQuant)" <Vlad.Lazarenko at worldquant.com> wrote:

> Hey everyone,
> 
> Does anyone happen to know if it is possible to receive non-contiguous mbufs from rte_eth_rx_burst? If so, when would this happen? I am thinking that NICs with LSO enabled could possibly do this if data does not fit into  RTE_MBUF_DEFAULT_BUF_SIZE? But if the packet fits, I don't see why the driver could possibly split that across multiple mbufs. Any insight is highly appreciated.
> 
> Thanks,
> Vlad


Any driver that handles jumbo frames is going to return a multiple segment mbuf when given
a mbuf pool with smaller buffers. It is common to create 2K mbuf pool and handle 9K frames.

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Please don't use such Lawyer stuff on public mailing lists.
In fact according to the wording, it probably is against your rules for
me to respond to it.