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

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Message-ID: <20140217214716.GD7941@thin>
Date:	Mon, 17 Feb 2014 13:47:16 -0800
From:	Josh Triplett <josh@...htriplett.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	niv@...ibm.com, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
	darren@...art.com, fweisbec@...il.com, oleg@...hat.com, sbw@....edu
Subject: Re: [PATCH tip/core/rcu 0/6] Documentation changes for 3.15

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@...htriplett.org>
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