linux-kernel - Re: [RFC/PATCH] slab: clean up allocation

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Date:	Fri, 29 Sep 2006 09:10:55 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Pekka J Enberg <penberg@...helsinki.fi>
cc:	manfred@...orfullife.com, christoph@...eter.com, pj@....com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC/PATCH] slab: clean up allocation

On Fri, 29 Sep 2006, Pekka J Enberg wrote:

> + * When allocating from current node.
> + */
> +#define SLAB_CURRENT_NODE (-1)
> +

If we want a constant here then we would better define a global one and 
use it throughout the kernel.

Something like

#define LOCAL_NODE (-1)

Maybe in include/*/topology.h ?


>  #endif
>  
> -static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
> +static inline void *cache_alloc_local(struct kmem_cache *cachep, gfp_t flags)
>  {
>  	void *objp;
>  	struct array_cache *ac;
> @@ -3059,35 +3064,6 @@ static inline void *____cache_alloc(stru
>  	return objp;
>  }

This is not really local in the sense of node local but its processor 
local. The speciality here is that we allocate from the per processor
list of objects. cache_alloc_cpu?

The rest looks fine on first glance.

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