pwru is an utility to trouble shoot network issue,
and to speed up pwru kprobe attachement, kernel needs
to have CONFIG_FPROBE.
running pwru also result in:
Opening kprobe-multi: invalid argument \
(missing kernel symbol or prog's AttachType not AttachTraceKprobeMulti?)
need following to avoid above invalid argument
echo -1 > /proc/sys/kernel/perf_event_paranoid
echo 0 > /proc/sys/kernel/kptr_restrict
see https://github.com/cilium/pwru/issues/460
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
1bfeb4b322