Re: [PATCH V2,net-next, 3/3] net: mana: Add support for jumbo frame

Jacob Keller
2023-04-11T23:13:01Z

On 4/7/2023 1:59 PM, Haiyang Zhang wrote:
> During probe, get the hardware-allowed max MTU by querying the device
> configuration. Users can select MTU up to the device limit.
> When XDP is in use, limit MTU settings so the buffer size is within
> one page.
> Also, to prevent changing MTU fails, and leaves the NIC in a bad state,
> pre-allocate all buffers before starting the change. So in low memory
> condition, it will return error, without affecting the NIC.
>

What happens if XDP gets enabled after MTU larger than PAGE_SIZE is set?
Will XDP fail to enable in that case?

Thanks,
Jake