There's currently kernel-side bottleneck when attaching probe
to multiple functions, which makes several tools like bpftrace
or retsnoop suffer in such use cases - it takes forever to
attach single probe for multiple functions ;-)
After multiple discussions and many failed attempts it looks
like we are on track to have working solution, which consists
of multiple gradual changes in ftrace and bpf code.
In this presentation I'll show and explain why the current code is
slow and introduce the proposed solution to the problem and the
status of the implementation.
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