Re: [PATCH V12 net-next 07/10] net: hibmcge: Implement rx_poll function to receive packets

[Paolo Abeni]

On 10/15/24 13:41, Jijie Shao wrote:
> on 2024/10/15 18:28, Paolo Abeni wrote:
> > Side note: the above always uses the maximum MTU for the packet size,
> > if the device supports jumbo frames (8Kb size packets), it will
> > produce quite bad layout for the incoming packets... Is the device
> > able to use multiple buffers for the incoming packets?
>
> In fact, jumbo frames are not supported in device, and the maximum MTU is 4Kb.

FTR, even 4Kb is bad enough: tiny packets (tcp syn, UDP dns req) will 
use a truesize above 5K. You can get a much better the layout using 
copybreak.

Cheers,

Paolo