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Re: [PATCH tip/core/rcu 0/7] Miscellaneous fixes for 4.10

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On Mon, Nov 14, 2016 at 08:56:48AM -0800, Paul E. McKenney wrote:
> Hello!
> 
> This series contains miscellaneous fixes to RCU:
> 
> 1.	Tighten up __call_rcu's alignment check for the rcu_head structure
> 	now that no arch does two-byte alignment of pointers.
> 
> 2.	Remove obsolete comment about when rcu_check_callbacks() was invoked.
> 
> 3.	Remove obsolete comment about which function opportunistically
> 	notes grace periods beginnings and endings.
> 
> 4.	Update the RCU_TRACE Kconfig option's help text to note that
> 	it enables event tracing in addition to debugfs, courtesy of
> 	Nikolay Borisov.
> 
> 5.	Add event tracing for long read-side delays in rcutorture
> 	in order to better debug too-short grace periods.
> 
> 6.	Make expedited grace periods recheck dyntick-idle state to avoid
> 	sending needless IPIs.
> 
> 7.	Don't kick CPUs unless there is grace-period activity currently
> 	in progress.

I replied to patches 5 and 6 with comments.  For 1-4 and 7:
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

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[PATCH tip/core/rcu 0/7] Miscellaneous fixes for 4.10 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 18:00 +0100
  [PATCH tip/core/rcu 3/7] rcu: Remove obsolete comment from __call_rcu() "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 18:00 +0100
  [PATCH tip/core/rcu 2/7] rcu: Remove obsolete rcu_check_callbacks() header comment "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 18:00 +0100
  [PATCH tip/core/rcu 4/7] rcu: RCU_TRACE enables event tracing as well as debugfs "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 18:00 +0100
  [PATCH tip/core/rcu 7/7] rcu: Don't kick unless grace period or request "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 18:00 +0100
  [PATCH tip/core/rcu 1/7] rcu: Tighten up __call_rcu() rcu_head alignment check "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 18:00 +0100
  [PATCH tip/core/rcu 6/7] rcu: Make expedited grace periods recheck dyntick idle state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 18:00 +0100
    Re: [PATCH tip/core/rcu 6/7] rcu: Make expedited grace periods  recheck dyntick idle state Josh Triplett <josh@joshtriplett.org> - 2016-11-14 18:30 +0100
      Re: [PATCH tip/core/rcu 6/7] rcu: Make expedited grace periods  recheck dyntick idle state Peter Zijlstra <peterz@infradead.org> - 2016-11-14 18:40 +0100
        Re: [PATCH tip/core/rcu 6/7] rcu: Make expedited grace periods  recheck dyntick idle state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 19:20 +0100
          Re: [PATCH tip/core/rcu 6/7] rcu: Make expedited grace periods  recheck dyntick idle state Peter Zijlstra <peterz@infradead.org> - 2016-11-15 09:20 +0100
            Re: [PATCH tip/core/rcu 6/7] rcu: Make expedited grace periods  recheck dyntick idle state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-15 15:40 +0100
  [PATCH tip/core/rcu 5/7] torture: Trace long read-side delays "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 18:00 +0100
    Re: [PATCH tip/core/rcu 5/7] torture: Trace long read-side delays Josh Triplett <josh@joshtriplett.org> - 2016-11-14 18:30 +0100
      Re: [PATCH tip/core/rcu 5/7] torture: Trace long read-side delays "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-14 19:50 +0100
        Re: [PATCH tip/core/rcu 5/7] torture: Trace long read-side delays Josh Triplett <josh@joshtriplett.org> - 2016-11-14 20:00 +0100
  Re: [PATCH tip/core/rcu 0/7] Miscellaneous fixes for 4.10 Josh Triplett <josh@joshtriplett.org> - 2016-11-14 18:30 +0100

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