Mark Kavanagh <mark.b.kavan...@intel.com> writes:
> DPDK provides an API to set the MTU of compatible physical devices -
> rte_eth_dev_set_mtu(). Prior to DPDK v16.07 however, this API was not
> implemented in some DPDK PMDs (i40e, specifically). To allow the use
> of jumbo frames with affected NICs in OvS-DPDK, MTU configuration was
> achieved by setting the jumbo frame flag, and corresponding maximum
> permitted Rx frame size, in an rte_eth_conf structure for the NIC
> port, and subsequently invoking rte_eth_dev_configure() with that
> configuration.
>
> However, that method does not set the MTU field of the underlying DPDK
> structure (rte_eth_dev) for the corresponding physical device;
> consequently, rte_eth_dev_get_mtu() reports the incorrect MTU for an
> OvS-DPDK phy device with non-standard MTU.
>
> Resolve this issue by invoking rte_eth_dev_set_mtu() when setting up
> or modifying the MTU of a DPDK phy port.
>
> Fixes: 0072e93 ("netdev-dpdk: add support for jumbo frames")
> Reported-by: Aaron Conole <acon...@redhat.com>
> Reported-by: Vipin Varghese <vipin.vargh...@intel.com>
> Signed-off-by: Mark Kavanagh <mark.b.kavan...@intel.com>
> ---
I won't have a chance to test this near-term, but it looks correct to
me. Thanks for this work, Mark!
Reviewed-by: Aaron Conole <acon...@redhat.com>
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