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Date: Fri, 03 Oct 2008 11:05:30 -0500
From: Christoph Lameter <cl@linux-foundation.org>
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To: Eric Dumazet <dada1@cosmosbay.com>
CC: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
       linux-mm@kvack.org, jeremy@goop.org, ebiederm@xmission.com,
       travis@sgi.com, herbert@gondor.apana.org.au, xemul@openvz.org,
       penberg@cs.helsinki.fi
Subject: Re: [patch 2/3] cpu alloc: Use in slub
References: <20081003152436.089811999@quilx.com> <20081003152500.102106878@quilx.com> <48E63E76.1010702@cosmosbay.com>
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Eric Dumazet wrote:
>
> Then maybe change MAX_NUMNODES to 0 or 1 to reflect
> node[] is dynamically sized ?

See kmem_cache_init(). It only allocates the used bytes. If you only have a
single nodes then only 1 pointer will be allocated.

#ifdef CONFIG_NUMA
        kmem_size = offsetof(struct kmem_cache, node) +
                                nr_node_ids * sizeof(struct kmem_cache_node *);
#else


That does not work for the statically allocated kmalloc array though.