Weird that kprobe-perf isn't working... I've just tried it on a fresh new installed 20.04 instance and:
ubuntu@ubuntu:~$ uname -a Linux ubuntu 5.4.0-12-generic #15-Ubuntu SMP Tue Jan 21 15:12:29 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux ubuntu@ubuntu:~$ sudo ls -l /sys/kernel/debug/tracing/available_filter_functions -r--r--r-- 1 root root 0 Feb 12 11:32 /sys/kernel/debug/tracing/available_filter_functions ubuntu@ubuntu:~$ sudo kprobe-perf -s 'p:shrink_node' Tracing kprobe shrink_node. Ctrl-C to end. ^C Ending tracing... ubuntu@ubuntu:~$ Are we using a different kernel? What are your kernel .config options about ftrace (grep FTRACE /boot/config-`uname -r`)? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861359 Title: swap storms kills interactive use To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861359/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
