linux-kernel - Re: [patch -mm] cpusets: add memory_slab

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Date:	Mon, 9 Mar 2009 14:50:06 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	David Rientjes <rientjes@...gle.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Matt Mackall <mpm@...enic.com>,
	Paul Menage <menage@...gle.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch -mm] cpusets: add memory_slab_hardwall flag

Again these are fastpath modifications.

Scanning the partial list for matching nodes is an expensive operation.

Adding RCU into the fast paths is also another big worry.

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