linux-kernel - Re: The performance and behaviour of the anti-fragmentation related patches

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Date:	Fri, 2 Mar 2007 16:33:19 -0800
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rik van Riel <riel@...hat.com>, Bill Irwin <bill.irwin@...cle.com>,
	Christoph Lameter <clameter@...r.sgi.com>,
	Mel Gorman <mel@...net.ie>, npiggin@...e.de, mingo@...e.hu,
	jschopp@...tin.ibm.com, arjan@...radead.org,
	torvalds@...ux-foundation.org, mbligh@...igh.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: The performance and behaviour of the anti-fragmentation related patches

On Fri, Mar 02, 2007 at 02:22:56PM -0800, Andrew Morton wrote:
> Opterons seem to be particularly prone to lock starvation where a cacheline
> gets captured in a single package for ever.

AIUI that phenomenon is universal to NUMA. Maybe it's time we
reexamined our locking algorithms in the light of fairness
considerations.


-- wli
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