Re: [PATCH 2/3] livepatch/rcu: Warn when system consistency is broken in RCU code

Paul E. McKenney
2017-05-08T21:30:57Z

On Mon, May 08, 2017 at 05:18:20PM -0400, Steven Rostedt wrote:
> On Mon, 8 May 2017 14:07:54 -0700
> "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote:
>
> > Except that, as Steven will quickly point out, this won't work at the
> > very edges of the NMI, when NMI_MASK won't be set in preempt_count().
>
> I believe those parts of the NMI has "notrace" because it can break
> other parts of ftrace too.

Should be good clean fun to validate that belief. ;-)

Thanx, Paul