Re: [PATCH] proc: Disable /proc/$pid/wchan

[Peter Zijlstra]

On Thu, Sep 23, 2021 at 04:31:05PM -0700, Kees Cook wrote:

> This leaves kernel/sched/fair.c as the only user of get_wchan(). But
> again, since this was broken for 4 years, was this profiling logic
> actually doing anything useful?

Unlikely, I proposed removing the whole kernel/profile.c thing a while
back, but some people complained that it would make it 'hard' to profile
early boot.

IMO this not actually working right seems another argument for killing
that too :-)