I'm having issues with a kworker process during system boot and I'd like to get such a nice call graph like Linus Torvalds posted here.
How would I do this?
He used Perf to create this but I can't tell you exactly how Linus created the graph (which parameters etc.).
It will create the cal graph in a file called perf.data.
and then use following commadn to view report.
See man page of perf-record and report for details.