Re: [lwip-users] Why does enabling Debug fix this tcp_sndbuf()

[Indan Zupancic]

Hello,

Beware that everything should be cache line aligned!
To be future proof assume cache size is 64 bytes, even if it's 32 bytes.

I recommend making the TX descriptors non-cacheable, bufferable
and the RX descriptors non-cacheable, non-bufferable and the DMA
buffers fully cacheable and use cache maintenance instructions
before sending packets and after receiving them.

Greetings,

Indan