linux-kernel - Re: [RFC] arch: Introduce new TSO memory barrier smp

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Message-ID: <20131106194244.GL16117@laptop.programming.kicks-ass.net>
Date:	Wed, 6 Nov 2013 20:42:44 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Victor Kaplansky <VICTORK@...ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Anton Blanchard <anton@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux PPC dev <linuxppc-dev@...abs.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Michael Ellerman <michael@...erman.id.au>,
	Michael Neuling <mikey@...ling.org>,
	Russell King <linux@....linux.org.uk>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Tony Luck <tony.luck@...el.com>
Subject: Re: [RFC] arch: Introduce new TSO memory barrier smp_tmb()

On Wed, Nov 06, 2013 at 10:48:48AM -0800, Paul E. McKenney wrote:
> A few nits on Documentation/memory-barriers.txt and some pointless
> comments elsewhere.  With the suggested Documentation/memory-barriers.txt
> fixes:
> 
> Reviewed-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

Thanks, I think I'll cut the thing into a number of smaller patches with
identical end result. Will (hopefully) post a full new series tomorrow
somewhere.

I was thinking like:
 1 - aggressively employ asm-generic/barrier.h
 2 - Reformulate _The_ document to ACQUIRE/RELEASE
 3 - add the new store/load thingies

That should hopefully be slightly easier to look at.
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