Hey all; I'm trying to use `perf record` to get detailed information about user page faults, including the addresses at which the faults occurred. I've done this before with, e.g., `perf record -e exceptions:page_fault_user -p 12345 sleep 1`. However, on the system I'm examining now, I just get an "unknown tracepoint" error. I checked /sys/kernel/debug/tracing/events/exceptions, and sure enough, that path does not exist. Does anybody happen to know under what circumstances these tracepoints could be disabled or omitted? I've looked through the kconfigs and sysctls for anything that might seem relevant but have had no luck so far. I'm running Ubuntu 16.04 with kernel 4.13 on a dual Xeon Gold 6126 system. # uname -a Linux test 4.13.0-37-generic #42~16.04.1 SMP Sat May 12 06:21:13 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux My kernel config is here: https://pastebin.com/raw/A62FDFd6 Any help or pointers would be greatly appreciated!