Comment 3 for bug 1977827

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Thibf (thibf) wrote : Re: ftrace in ubuntu_kernel_selftests failed with "check if duplicate events are caught" on J-5.15 P9 / J-kvm / L-kvm

kprobe_events are not available (seems related to CONFIG_KALLSYMS disabled) and this test `tools/testing/selftests/ftrace/test.d/dynevent/` doesn't seems to works well in this case as it fails quickly:
+ echo e:egroup/eevent syscalls/sys_enter_openat file=+0($filename):ustring
./ftracetest: 18: echo: echo: I/O error