Using eBPF to add arbitrary delay to kernel functions

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It used to be the case that eBPF programs were very limited in what they could do in the kernel; no loops, only a very limited number of instructions, etc. Over time, the capabilities of eBPF have expanded quite dramatically. And even though the verifier makes sure eBPF programs will eventually exit, “eventually” does not necessarily mean “in a timely manner”. This has been…

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