Re: [PATCH tip/core/rcu 0/20] Miscellaneous fixes for 4.11

Paul E. McKenney
2017-01-17T01:08:13Z

On Mon, Jan 16, 2017 at 12:09:20AM -0800, Josh Triplett wrote:
> On Sat, Jan 14, 2017 at 01:12:55AM -0800, Paul E. McKenney wrote:
> > Hello!
> >
> > This series provides miscellaneous fixes:
> >
> > 1. Make RCU_EXPEDITE_BOOT be the default in order to speed up
> > boot, courtesy of Sebastian Andrzej Siewior.
> >
> > 2. Make RCU suspicious-access lockdep splats use pr_err().
> >
> > 3. Disable sys_membarrier when nohz_full is enabled, courtesy
> > of Mathieu Desnoyers.
> >
> > 4. Only dump stalled-tasks stacks if there was a real stall, courtesy
> > of Byungchul Park.
> >
> > 5. Remove unneeded rcu_process_callbacks() declarations.
> >
> > 6. Remove unused but set "mask" variable, courtesy of Tobias Klauser.
> >
> > 7. Remove short-term CPU kicking.
> >
> > 8. Add long-term CPU kicking.
> >
> > 9. Once again use NMI-based stack traces in stall warnings.
> >
> > 10. Add functions to test for trivial grace periods.
> >
> > 11. Make cond_resched() provide RCU quiescent state, which will
> > hopefully lead to the removal of cond_resched_rcu_qs().
> >
> > 12. Re-enable TASKS_RCU for User Mode Linux.
> >
> > 13. Don't wake rcuc/X kthreads on NOCB CPUs.
> >
> > 14. Add comment headers to expedited-grace-period counter functions.
> >
> > 15. Make rcu_cpu_starting() use its "cpu" argument.
> >
> > 16. Enable RCU tracepoints by default to aid in debugging, courtesy
> > of Matt Fleming.
> >
> > 17. Fix comment in rcu_organize_nocb_kthreads(), which no longer
> > spawns kthreads.
> >
> > 18. Clarify comments about when llist locking is needed, courtesy
> > of Joel Fernandes.
> >
> > 19. Eliminate unused expedited_normal counter.
> >
> > 20. Add lockdep checks to synchronous expedited primitives.
>
> I replied to patches 2, 8, 10, and 11 with comments. For the rest:
> Reviewed-by: Josh Triplett <josh@joshtriplett.org>

Applied, thank you!

Thanx, Paul