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

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Date:	Mon, 3 Mar 2008 22:41:57 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Nick Piggin" <npiggin@...e.de>
Cc:	"Christoph Lameter" <clameter@....com>, 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, Mar 3, 2008 at 10:24 PM, Nick Piggin <npiggin@...e.de> wrote:
>  > Then align the objects at cacheline boundaries by providing a value for
>  > the align parameter to kmem_cache_create().
>
>  max(num_possible_cpus() > 1 ? cache_line_size() : 0, mandatory_alignment)?
>
>  Then suppose we want a CONFIG_TINY option to eliminate it?

Hmm... Can't we just fix SLAB_HWCACHE_ALIGN in SLUB to follow the
semantics of SLAB?
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