[charcoalhobo]

Love deep dive troubleshooting like this. I haven't heard of systemtap before; looks nice. When I had to troubleshoot a kernel bug [1] I used perf [2] probes which are also really nice for this kind of debugging.

[1] https://www.spinics.net/lists/xdp-newbies/msg01231.html

[2] https://www.brendangregg.com/perf.html