Single RX queue kernel bypass in Netmap for high packet rate networking

What this post added

This post details Cloudflare's contribution to the Netmap project, introducing a 'single RX queue mode'. This feature allows user-space applications to bypass the Linux kernel for specific network flows, enabling high-speed packet processing and filtering of large packet floods. This is crucial for their network infrastructure, especially when dealing with attacks, and addresses limitations with certain NICs by providing a more flexible kernel bypass solution.