netdev - Re: [rfc][patch 2/3] slab: introduce SMP alignment

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Date:	Mon, 3 Mar 2008 11:06:55 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Nick Piggin <npiggin@...e.de>
cc:	netdev@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	yanmin_zhang@...ux.intel.com, David Miller <davem@...emloft.net>,
	Eric Dumazet <dada1@...mosbay.com>
Subject: Re: [rfc][patch 2/3] slab: introduce SMP alignment

On Mon, 3 Mar 2008, Nick Piggin wrote:

> Introduce SLAB_SMP_ALIGN, for allocations where false sharing must be
> minimised on SMP systems.

Mandatory alignment are specified as a parameter to kmem_cache_create not 
as flags. Ycan specify the alignment as a parameter. i.e. L1_CACHE_BYTES 
or cache_line_size().

Maybe we should drop SLAB_HWCACHE_ALIGN because of the confusion is 
creates because it seems that flags can be used to enforce alignments?

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