From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Lameter <cl@linux.com>
Subject: Re: [PATCH] atomic: add atomic_inc_not_zero_hint()
Date: Mon, 15 Nov 2010 07:57:10 -0600 (CST)
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Cc: Eric Dumazet <eric.dumazet@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	David Miller <davem@davemloft.net>,
	netdev <netdev@vger.kernel.org>,
	Arnaldo Carvalho de Melo <acme@infradead.org>,
	Ingo Molnar <mingo@elte.hu>, Andi Kleen <andi@firstfloor.org>,
	Nick Piggin <npiggin@kernel.dk>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
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On Sat, 13 Nov 2010, Paul E. McKenney wrote:

> On Fri, Nov 12, 2010 at 01:14:12PM -0600, Christoph Lameter wrote:
> >
> > prefetchw() would be too much overhead?
>
> No idea.  Where do you believe that prefetchw() should be added?

It is another way to get an exclusive cache line
for situations like this. No need to give a hint.