[dpdk-dev] [PATCH 2/4] enic: set the max allowed MTU for the NIC

[John Daley (johndale)]

Hi Bruce,

> > * What was the MTU set to by default before this patch is applied? Was
> > it just set to 1518 or something else?
> > * What happens, if anything, if buffers bigger than the MTU size are sent
> down?
> This is obviously referring to buffers bigger than MTU on TX. There is also the
> question of what happens if buffer sizes smaller than MTU are provided on
> RX.

I think I answered all your questions in the revised commit messages of the v2 patchset (and then some) except this last one. Enic doesn't do any checking on Rx that buffers are greater than the MTU since it would affect performance. However if a packet is bigger than a buffer and Rx scatter is disabled, the packet will be dropped and 'imissed' incremented.

Thanks,
Johnd