This explanation on eBPF program size limit was initially published in February 2021 by the Cilium community as part of the eBPF Updates #4 on ebpf.io. Do you know what the maximum size of an eBPF program is? You may have heard of programs limited to 4k instructions, but this has changed some time ago. One particularity of eBPF programs, enforced at load time by the kernel verifier, is that they must run and eventually terminate within a relatively short delay. Allowing for long runs would sl...
