I'm using ftrace to trace ip_local_out() in kernel 5.4.20. I'm sure ip_local_out() is available to trace: /sys/kernel/debug/tracing # cat available_filter_funct
struts-validation
ngb-typeahead
xamarin-entry
vgam
.net-framework-version
gnocchi
django-media
multiple-variable-return
t4
less-loader
dsolve
cellspacing
fyne
camunda-modeler
sequence-generators
fo-dicom
hp-uft
rule-of-three
asp.net-core-6.0
shelving
scrapinghub
sveltekit
maven-plugin-development
certificate-revocation
eclipse-pdt
vue-pdf
xinput
pod-priority
gradle-task
amazon-swf