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
persistent
echarts4r
spring-batch-stream
flipbookr
clrmd
aws-billing
android-assetmanager
cleartimeout
azure-stack
okular
fsync
telegram-webhook
slurm
aleph.js
airtable
dependency-graph
angular-universal
virtual-printer
htmltools
thinky
ankhsvn
fauxton
n-api
numeric-limits
mootools
kudu
column-sizing
string-concatenation
physics
arrayobject