Re: Experiencing freezes with kernel 4.16.3 on a desktop with E5500 CPU (bisect included)

From: Thomas Gleixner
Date: Tue Apr 24 2018 - 05:06:32 EST

On Mon, 23 Apr 2018, Peter Zijlstra wrote:

> On Mon, Apr 23, 2018 at 05:58:01PM +0200, Peter Zijlstra wrote:
> > Thomas, we could not find the de-rate stuff, but the above can be
> > simplified; what happens is:
> >
> > cs->flags |= UNSTABLE;
> > schedule_work(&watchdog_work)
> > kthread_run(clocksource_watchdog_kthread)
> Also, Thomas, do you remember why we spawn a short running kthread from
> a work ? Can't we simply run the whole thing from the worker thread?

No. I think we did it directly in the early days and then it was changed to
that worker/thread stuff for whatever reason. I need to do git archaeology.