On Thu, 10 Oct 2019 10:50:35 +0200 Petr Mladek <pmladek@xxxxxxxx> wrote: > It will make the flag unusable for other ftrace users. But it > will be already be the case when it can't be disabled. Honestly, I hate that flag. Most people don't even know about it. It was added in the beginning of ftrace as a way to stop function tracing in the latency tracer. But that use case has been obsoleted by 328df4759c03e ("tracing: Add function-trace option to disable function tracing of latency tracers"). I may just remove the damn thing and only add it back if somebody complains about it. -- Steve