$ uname -a Linux millbarge 5.4.0-12-generic #15-Ubuntu SMP Tue Jan 21 15:12:29 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux $ grep FTRACE /boot/config-`uname -r` CONFIG_KPROBES_ON_FTRACE=y CONFIG_HAVE_KPROBES_ON_FTRACE=y CONFIG_STM_SOURCE_FTRACE=m # CONFIG_PSTORE_FTRACE is not set CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_FTRACE=y CONFIG_FTRACE_SYSCALLS=y CONFIG_DYNAMIC_FTRACE=y CONFIG_DYNAMIC_FTRACE_WITH_REGS=y CONFIG_FTRACE_MCOUNT_RECORD=y # CONFIG_FTRACE_STARTUP_TEST is not set
$ sudo ls -l /sys/kernel/debug/tracing/available_filter_functions ls: cannot access '/sys/kernel/debug/tracing/available_filter_functions': No such file or directory $ sudo kprobe-perf -s 'p:shrink_node' ERROR: func shrink_node not in /sys/kernel/debug/tracing/available_filter_functions. Either it doesn't exist, or, it might be unsafe to kprobe. Exiting. Use -F to override. Are you using secure boot? $ dmesg | grep -i secure [ 0.000000] secureboot: Secure boot enabled [ 0.000000] Kernel is locked down from EFI Secure Boot mode; see man kernel_lockdown.7 [ 0.019867] secureboot: Secure boot enabled [ 0.965284] integrity: Loaded X.509 cert 'millbarge Secure Boot Module Signature key: effb550c01bc71fba674d2a0b19930ccde197df8' [ 72.131681] Bluetooth: hci0: Secure boot is enabled Thanks -- 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
