Re: [PATCH 2/2] sched/debug: add sched_update_nr_running tracepoint

From: Peter Zijlstra
Date: Wed Sep 04 2019 - 13:47:38 EST

On Wed, Sep 04, 2019 at 08:51:21AM -0700, Alexei Starovoitov wrote:
> Anything in tracing can be deleted.
> Tracing is about debugging and introspection.
> When underlying kernel code changes the introspection points change as well.

Right; except when it breaks widely used tools; like say powertop. Been
there, done that.