netdev - Re: [rfc][patch 3/3] use SLAB_ALIGN

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Date:	Mon, 3 Mar 2008 11:09:51 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	Nick Piggin <npiggin@...e.de>, Eric Dumazet <dada1@...mosbay.com>,
	netdev@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	yanmin_zhang@...ux.intel.com, David Miller <davem@...emloft.net>
Subject: Re: [rfc][patch 3/3] use SLAB_ALIGN_SMP

On Mon, 3 Mar 2008, Pekka Enberg wrote:

> At least historically SLAB_HWCACHE_ALIGN has been just a hint,
> although slab tries very hard to satisfy it (see the comments in
> mm/slab.c). Why do we need stronger guarantees than that, btw?

Its a hint. Alignment is specified as a parameter to kmem_cache_create not 
as a flag. Maybe we could remove SLAB_HWCACHE_ALIGN because it is causing 
so much confusion?
 
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