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
app-data
blue-green-deployment
cancellationtokensource
netrw
text-editor
vcpu
a4swift
archicad
docker-entrypoint
nexpose
jsonmodel
octobercms
failovercluster
hlist
gcr.io
circom
operationalerror
ui-testing
teensy
phpspreadsheet
antlrworks
listmodel
minishift
side-channel-attacks
wso2is
keycloak-javascript
forecasting
wpa2-psk
nest-api
mocha-phantomjs