Re: [PATCH tip/core/rcu 0/6] Documentation changes for 3.15

[Josh Triplett <josh@joshtriplett.org>]

On Mon, Feb 17, 2014 at 01:26:25PM -0800, Paul E. McKenney wrote:
> Hello!
> 
> This series provides a variety of documentation updates:
> 
> 1.	Update the documentation on actions to take to avoid frenetic
> 	call_rcu() invocations from exhausting memory, including a mention
> 	of internal-to-RCU avoidance measures.
> 
> 2.	Add a note to Documentation/memory-barriers.txt stating that
> 	ACCESS_ONCE() provides cache coherence for accesses to any
> 	single given variable.
> 
> 3.	Add an explicit statement that in control dependencies, the
> 	condition must include the load in question.
> 
> 4.	Add WQ_SYSFS workqueues as a work-offloading option in
> 	Documentation/kernel-per-CPU-kthreads.txt.
> 
> 5.	It turns out that some types of control dependencies require
> 	memory barriers, most notably when the exact same store is
> 	at the beginning of both the then-clause and the else-clause.
> 	Document this.
> 
> 6.	Fixups to RTFP.txt

I've replied to 1, 2, and 5 with comments.  For 3, 4, and 6:
Reviewed-by: Josh Triplett <josh@joshtriplett.org>