linux-kernel - Re: [rfc][patch 3/3] x86: optimise barriers

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Message-ID: <20071012121043.GG1962@ff.dom.local>
Date:	Fri, 12 Oct 2007 14:10:43 +0200
From:	Jarek Poplawski <jarkao2@...pl>
To:	Nick Piggin <npiggin@...e.de>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andi Kleen <ak@...e.de>
Subject: Re: [rfc][patch 3/3] x86: optimise barriers

On Fri, Oct 12, 2007 at 01:55:10PM +0200, Jarek Poplawski wrote:
> On Fri, Oct 12, 2007 at 12:42:38PM +0200, Nick Piggin wrote:
...
> > [...] If you can actually come up with a test
> > case that triggers load/load or store/store reordering, I'm sure
> > Intel / AMD would like to see it ;)
> 
> It seems, after testing only (plus no official spec against this idea),

(...plus of course proper smp_rmb & smp_wmb vs. smp_mb interpretation
probably available from Paul McKenney or Davide Libenzi before this
Intel spec, as well...)

Jarek P.
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