Re: [PATCH -mm] slub: fix cpu hotplug offline/online path

[Christoph Lameter]

On Wed, 10 Oct 2007, Akinobu Mita wrote:

> I couldn't use get_cpu_slab() for that check. But I reviced the patch to do
> what you said.

Why would get_cpu_slab not work?

> +	if (per_cpu(kmem_cache_cpu_free, cpu)) {
> +		/* Already initialized once */
> +		return;
> +	}
> +

kmem_cache_cpu_free is not only NULL if the cpu is not up yet but it is 
also NULL if the per cpu pool of kmem_cache_cpu structures was 
exhausted.
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