How Linux BPF Iterators Transform Kernel Data Access

In episode 127 of The Linux Podcast, Lucas and Luna explore BPF iterators — a relatively recent addition to the eBPF ecosystem that lets you traverse kernel data structures efficiently without writing manual loops in C. They walk through a concrete example: using a BPF iterator to list all open TCP sockets with minimal overhead, comparing it to older methods like /proc and netlink. The hosts discuss how iterators reduce boilerplate, improve safety, and enable new observability use cases. They also cover the runtime cost difference and why projects like Cilium and Falco are adopting iterators. A focused, code-level conversation for anyone building or debugging Linux systems.

#Linux #eBPF #BPFIterators #Kernel #Observability #SystemsProgramming #Networking #TCP #Cilium #Falco #OpenSource #Technology #Performance #KernelDevelopment #LinuxKernel #FexingoBusiness #BusinessPodcast #Podcast

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