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

[Jijie Shao]

on 2024/10/15 19:57, Paolo Abeni wrote:
> 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

Sorry, Actually 4KB。the default mtu is 1500