Re: v5.9-rc3-rt3 boot time networking lockdep splat

From: Sebastian Andrzej Siewior
Date: Tue Sep 08 2020 - 15:20:03 EST

On 2020-09-08 17:59:31 [+0200], Mike Galbraith wrote:
> > I have no idea how to debug this based on this report. Can you narrow
> > it down to something?
> I instrumented what I presume is still this problem once upon a time,
> structures containing locks are allocated/initialized/freed again and
> again with no cleanup until we increment into the wall.

Any idea what it is?

> > Is Lappy new, got a new something or has a new config switch? I'm just
> > curious if this something or something that was always there but
> > remained undetected.
> Nah, this is nothing new. Turn lockdep on in RT, it's just a matter of
> time before it turns itself off. It's usually just not _that_ quick.

Okay. So I have few boxes which run over the weekend without this splat.

> -Mike